Rules, Laws, Policies and Guidance

The Division of Drinking and Ground Waters (DDAGW) rules were promulgated under U.S. EPA's Safe Drinking Water Act (SDWA). Rules for Ohio public drinking water systems are adopted under Ohio Revised Code (ORC) Section 6109, and rules for Underground Injection Control, under ORC 6111.043. Ohio Administrative Code (OAC) rules administered by DDAGW are located on this page. More information about DDAGW's rule-making process is available under the "DDAGW Rules Process" section below.

Electronic versions of policies and guidance may be viewed by clicking on the appropriate tab. Join a rules electronic mailing list to stay informed about current rule-making and opportunities to provide comment during the process.

Questions? Call (614) 644-2752 and ask to speak with a Rules Coordinator.

 

 

Announcements

DDAGW's effective rules are available on this webpage. To view the rules, click here.

  • Oct. 21, 2021: DDAGW seeks comments on a plan to file Underground Injection Control rules in chapter 3745-34 of the Ohio Administrative Code (OAC). Comments are due by 11/22/21. Click here for more information.
  • Oct. 5, 2021: The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to Primary Drinking Water Standards rules in chapter 3745-81 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • Oct. 4, 2021: DDAGW seeks comments on a plan to file Backflow Prevention and Cross Connection Control rules in chapter 3745-95 of the Ohio Administrative Code (OAC) as "Amend". Comments are due by November 4, 2021. Click here for more information.
  • Sept. 17, 2021: DDAGW seeks comments on a plan to file Contingency Plans rule in chapter 3745-85 of the Ohio Administrative Code (OAC) as "Amend". Comments are due by October 18, 2021. Click here for more information.
  • Sept. 15, 2021: DDAGW seeks comments on a plan to file Emergency Loans rules in chapter 3745-86 of the Ohio Administrative Code (OAC) as "Amend". Comments are due by October 15, 2021. Click here for more information.
  • Aug. 17, 2021: DDAGW seeks comments on a plan to file Ground Water rules in chapter 3745-81 of the Ohio Administrative Code (OAC). Comments are due by Sept. 17, 2021. Click here for more information.
  • August 6, 2021: DDAGW seeks comments on a plan to file Revised Total Coliform Rules in chapter 3745-81 of the Ohio Administrative Code (OAC) as "Amend". Comments are due by September 10, 2021. Click here for more information.
  • August 4, 2021: The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to Secondary Maximum Contaminant Levels rules in chapter 3745-82 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • July 16, 2021: DDAGW seeks comments on the interested party drafts of the Updating Outdated Modes rule package. Comments are due by August 13, 2021. Click here for more information.
  • June 1, 2021: DDAGW seeks comments on a plan to file Contingency Plan rule 3745-85-01 of the Ohio Administrative Code (OAC). Comments are due by July 1, 2021. Click here for more information.
  • May 12, 2021: DDAGW seeks comments on a plan to file Emergency Loan Rule 3745-86-01 of the Ohio Administrative Code (OAC). Comments are due by June 9, 2021. Click here for more information.
  • April 28, 2021: DDAGW seeks comments on a plan to amend Harmful Algal Bloom Rules in chapter 3745-90 of the Ohio Administrative Code (OAC). Comments are due by May 26, 2021. Click here for more information.
  • March 26, 2021: DDAGW seeks comments on a plan to file Secondary Maximum Contaminant Levels rules in chapter 3745-82 of the Ohio Administrative Code (OAC) as "No Change". Comments are due by April 26th, 2021. Click here for more information.
  • March 11, 2021: The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to Consumer Confidence Report rules in chapter 3745-96 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • Feb. 18, 2021: DDAGW seeks comments on a plan to amend several Financial Assurance Rules in chapter 3745-92 of the Ohio Administrative Code (OAC). Comments are due by March 18, 2020. Click here for more information.
  • Feb. 4, 2021: The Division of Drinking and Ground Waters (DDAGW)several rules in Chapter 3745-81-34 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR) on Feb. 4, 2021. The rules were reviewed as a result of the five-year rule review requirements of Section 106.03 of the Revised Code. Click here for more information.
  • December 18, 2020: DDAGW seeks comments on the Guidance Document, ENG-9119-GD-Guidelines for Determining when Source and Treatment Changes Trigger Optimal Corrosion Control Evaluation. Please submit comments to ddagw_ppg@epa.ohio.gov by January 29, 2021.
  • Nov. 17, 2020: DDAGW seeks comments on a plan to file Secondary Maximum Contaminant Level rules in chapter 3745-82 of the Ohio Administrative Code (OAC) as "No Change". Comments are due by December 15, 2020. Click here for more information.
  • Nov. 12, 2020: The Division of Drinking and Ground Waters (DDAGW) final filed Organic Chemical Monitoring Requirements (Rule 3745-81-24) of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR) on Nov. 12, 2020. The rules were reviewed as a result of the five-year rule review requirements of Section 106.03 of the Revised Code. Click here for more information.
  • Oct. 16, 2020: The Division of Drinking and Ground Waters (DDAGW) final filed Laboratory Certification Rules in Chapter 3745-89 and 3745-81 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR) on Oct. 16, 2020. The rules were reviewed as a result of the five-year rule review requirements of Section 106.03 of the Revised Code. Click here for more information.
  • Oct. 13, 2020: DDAGW seeks comments on a plan to amend several Revised Total Coliform Rules rules in chapter 3745-81 of the Ohio Administrative Code (OAC). Comments are due by November 10, 2020. Click here for more information.
  • Sept. 22, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to the consumer confidence report rules in chapter 3745-96 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • Sept. 21, 2020: DDAGW seeks comments on a plan to amend several Water Well Standard rules in chapter 3745-9 of the Ohio Administrative Code (OAC). Comments are due by October 21st, 2020. Click here for more information.
  • Sept. 15, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed minor amendments to rules 3745-34-09, 3745-34-21, and 3745-34-63 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). These rules establish requirements for construction, permitting, maintenance, operations and closure of underground injection wells. Click here for more information.
  • Sept. 1, 2020: The Division of Drinking and Ground Waters (DDAGW) final filed Disadvantaged Community Loan Rules in Chapter 3745-88 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR) on August 31, 2020. The rules were reviewed as a result of the five-year rule review requirements of Section 106.03 of the Revised Code. Click here for more information.
  • Aug. 3, 2020: DDAGW seeks comments on a plan to amend Operational Requirements rule 3745-83-01 of the Ohio Administrative Code (OAC). Comments are due by August 31st, 2020. Click here for more information.
  • July 28, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed several amendments to rule 3745-81-24 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). This rule establishes Organic Chemical Monitoring Requirements. Click here for more information.
  • July 28, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed several amendments to the Laboratory Certification rules in Chapters 3745-89 and 3745-81 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • July 7, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to underground injection control rule 3745-34-62 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • June 17, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed revisions to the Disadvantaged Community Loan rules in Chapter 3745-88 of the Administrative Code to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • June 8, 2020: DDAGW seeks comments on a plan to amend several Harmful Algal Bloom rules in chapter 3745-90 of the Ohio Administrative Code (OAC). Comments are due by July 6th, 2020. Click here for more information.
  • May 29, 2020: DDAGW seeks comments on a plan to amend several Plan Approval rules in chapter 3745-91 of the Ohio Administrative Code (OAC). Comments are due by June 26th, 2020. Click here for more information.
  • March 16, 2020: Notice is hereby given that the Director of the Ohio Environmental Protection Agency (Ohio EPA) has final filed the following rules of the Ohio Administrative Code: 3745-81-32, 3745-81-72, 3745-81-73, 3745-81-75 & 3745-81-79. The Director's order of adoption was issued on March 13, 2020. This adopted rule will become effective on March 23, 2020. Click here for more information.
  • March 3, 2020: DDAGW seeks comments on a plan to file several Consumer Confidence Report rules in chapter 3745-96 of the Ohio Administrative Code (OAC) with no changes. Comments are due by March 31st, 2020. Click here for more information.
  • Feb. 27, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to several underground injection control rules in Chapter 3745-34 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • Feb. 26, 2020: The Division of Drinking and Ground Waters (DDAGW) has reviewed OAC rule 3745-34-62 to satisfy the five-year rule review requirements of Section 106.03 of the Ohio Revised Code (ORC). The division is seeking comments on the proposal to file this rule with "'no changes". Comments are due March 30, 2020. Click here for more information.
  • Feb. 26, 2020: The Division of Drinking and Ground Waters (DDAGW) has reviewed several primary drinking water standards rules in OAC Chapter 3745-81 to satisfy the five-year rule review requirement of Section 106.03 of the Ohio Revised Code (ORC). The division is seeking comments on the proposal to file these rules with "'no changes". Comments are due by March 30, 2020. Click here for more information.
  • Feb. 25, 2020: DDAGW seeks comments on a plan to amend several Backflow Prevention and Cross Connection Control rules in chapter 3745-95 of the Ohio Administrative Code (OAC). Comments are due by March 24th, 2020. Click here for more information.
  • Feb. 6, 2020: DDAGW seeks comments on proposed rulemaking governing Disadvantaged Community Loan rules. Comments are due by March 5, 2020. Click here for more information.
  • Jan. 22, 2020: The Division of Drinking and Ground Waters (DDAGW) has proposed revisions to several Primary Drinking Water Standard rules in Chapter 3745-81 of the Administrative Code to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • Dec. 30,2019: DDAGW has finalized the Policy: Guidelines for Obtaining Approval of Backflow Prevention Methods in Drinking Water Treatment Plants (ENG-9120-PO). This document was developed in consultation with Ohio Section AWWA – Technology Committee to provide technical guidance to the regulated community and consultants concerning backflow prevention requirements. Click here for more information.
  • Dec. 11, 2019: DDAGW seeks comments on proposed rulemaking governing Laboratory Certification rules. Comments are due by Jan 10, 2020. Click here for more information.
  • Oct. 21, 2019: DDAGW seeks comments on a plan to amend Underground Injection Control rules in chapter 3745-34 of the Ohio Administrative Code (OAC). Comments are due by November 4th, 2019. Click here for more information.
  • Oct. 9, 2019: The Division of Drinking and Ground Waters (DDAGW) seeks comments on proposed rule revisions to Primary Drinking Water Standards rule 3745-81-24 to satisfy the five-year rule review requirements of Section 106.03 of the Ohio Revised Code (ORC).  Comments are due by November 6, 2019.  Click here for more information.
  • Oct. 2, 2019: The Division of Drinking and Ground Waters (DDAGW) has proposed amendments to several surface water treatment rules in Chapter 3745-81 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Click here for more information.
  • Sept. 23, 2019: The Division of Drinking and Ground Waters (DDAGW) has reviewed several underground injection control rules in Chapter 3745-34 of the Ohio Administrative Code (OAC) to satisfy the five-year rule review requirements of Section 106.03 of the Ohio Revised Code (ORC). The division is seeking comments on the proposal to file these rules with "'no changes". Comments are due by October 25, 2019.  Click here for more information.
  • Sept. 12, 2019: The Division of Drinking and Ground Waters (DDAGW) seeks comments on proposed rule revisions to several underground injection control rules in Chapter 3745-34 to satisfy the five-year rule review requirements of Section 106.03 of the Ohio Revised Code (ORC).  Comments are due by October 15, 2019.  Click here for more information.
  • Aug. 15, 2019: DDAGW seeks comments on the draft policy document, ENG-20-001: Guidelines for Obtaining Approval of Backflow Prevention Methods in Drinking Water Treatment Plants. This document was developed in consultation with Ohio Section AWWA – Technology Committee to provide technical guidance to the regulated community and consultants concerning backflow prevention requirements. Please submit comments or questions to DDAGW_Rulecomments@epa.ohio.gov by September 5th, 2019.
  • April 19, 2019: DDAGW has finalized the guidance document Guidelines for Determining When Source or Treatment Changes Tigger Optimal Corrosion Control Evaluation (ENG-19-001) and addressed all comments in a formal Response to Comments. This document provides guidance on when a source or treatment change in a public water system requires the evaluation of optimal corrosion control treatment (OCCT). Click here to view the effective ENG-19-001 guidance.
  • March 26, 2019: DDAGW seeks comments on the draft guidance document, WQ-01-007: Guidance on Total Coliform Bacteria Monitoring for Small Public Water Systems (Population Less Than 3,301 Persons). This document was revised to incorporate the changes in total coliform bacteria monitoring covered by the Revised Total Coliform Rule (RTCR) as adopted by the U.S. EPA effective April 1, 2016. Please submit comments or questions to DDAGW_Rulecomments@epa.ohio.gov by April 19th, 2019.
  • Jan. 16, 2019: DDAGW has finalized the policy document, PWS-01-003: Clarification of Public Water Systems Definition and Exemption Criteria. This document was revised to provide additional information about Public Water System Exemption Guidance, and update citations. Click here to view all currently effective policy and guidance documents.
  • Jan. 8, 2019: DDAGW seeks comments on revised plan to amend Primary Drinking Water Standard rule 3745-81-24 of the Ohio Administrative Code (OAC). Comments are due by February 1, 2019. Click here for more information.

Policies and Guidance

Please see the Policies and Guidance tab for the most current versions of these documents.

Resources

DDAGW's Rule-making Process

The Division of Drinking and Ground Waters (DDAGW) rules were promulgated under U.S. EPA's Safe Drinking Water Act (SDWA). Rules for Ohio public drinking water systems are adopted under Ohio Revised Code (ORC) Section 6109, and rules for Underground Injection Control, under ORC 6111.043. Ohio Administrative Code (OAC) rules administered by DDAGW are located on this page. 

Proposing new rules and amendments to existing rules is a regular activity conducted by Ohio EPA in response to laws passed by the General Assembly and federal rule requirements. The Agency is also required by state law to review its rules at least once every five years to ensure their continued need and relevance. During the Ohio rule-making process, rules are in one of four phases: early stakeholder outreachdraftproposed; and effective. Electronic versions of rules in each of these various phases may be viewed by clicking on the appropriate tabs on this page. 

In addition to adopting rules and laws, DDAGW adopts both policies and guidance documents. The purpose of a policy is to clarify and explain specific aspects of regulations (OAC) and law (ORC) so Ohio EPA and external parties have a common understanding of how environmental regulations are carried out in Ohio. Policies promote consistency and provide savings of both technical and administrative staff resources when dealing with the application of rules. Guidance documents provide information, suggestions and recommendations on possible or acceptable methods that may be used to meet or to achieve compliance with rules.

Electronic versions of policies and guidance may be viewed by clicking on the appropriate tab. Join a rules electronic mailing list to stay informed about current rule-making and opportunities to provide comment during the process.

Early Stakeholder Outreach

As of Jan. 1, 2012, Ohio EPA will conduct early stakeholder outreach in response to requirements of Executive Order 2011-01K. This outreach ensures stakeholders are brought into the rule process as early as possible.

Oct. 21, 2021: DDAGW seeks comments on a plan to file Underground Injection Control rules in chapter 3745-34 of the Ohio Administrative Code (OAC). Comments are due by 11/22/21.

Aug. 17, 2021: DDAGW seeks comments on a plan to file Ground Water rules in chapter 3745-81 of the Ohio Administrative Code (OAC). Comments are due by Sept. 17, 2021.

June 1, 2021: DDAGW seeks comments on a plan to file Contingency Plan rule 3745-85-01 of the Ohio Administrative Code (OAC). Comments are due by July 1, 2021.

April 29, 2021: DDAGW seeks comments on a plan to file Operational Requirements rules 3745-83-01 and 3745-81-01 of the Ohio Administrative Code (OAC). Comments are due by May 29th, 2021.

Feb. 18, 2021: DDAGW seeks comments on a plan to amend several Financial Assurance Rules in chapter 3745-92 of the Ohio Administrative Code (OAC). Comments are due by March 18, 2020.

Oct. 13, 2020: DDAGW seeks comments on a plan to amend several Revised Total Coliform Rules rules in chapter 3745-81 of the Ohio Administrative Code (OAC). Comments are due by November 10, 2020.

Sept. 21, 2020: DDAGW seeks comments on a plan to amend several Water Well Standard rules in chapter 3745-9 of the Ohio Administrative Code (OAC). Comments are due by October 21st, 2020.

Aug. 3, 2020: DDAGW seeks comments on a plan to amend Operational Requirements rule 3745-83-01 of the Ohio Administrative Code (OAC). Comments are due by August 31st, 2020.

May 29, 2020: DDAGW seeks comments on a plan to amend several Plan Approval rules in chapter 3745-91 of the Ohio Administrative Code (OAC). Comments are due by June 26th, 2020​.

Feb. 25, 2020: DDAGW seeks comments on a plan to amend several Backflow Prevention and Cross Connection Control rules in chapter 3745-95 of the Ohio Administrative Code (OAC). Comments are due by March 24th, 2020​.

Oct. 21, 2019: DDAGW seeks comments on a plan to amend several Underground Injection Control rules in chapter 3745-34 of the Ohio Administrative Code (OAC). Comments are due by November 4th, 2019.

May 29, 2018: DDAGW seeks comments on plan to revise rule 3745-91-09 of the administrative code to establish treatment requirements related to manganese in public water systems and adopt a new rule for monitoring compliance with iron and manganese. Comments are due by July 2, 2018.

Interested Party Review

Ohio EPA distributes draft rules to interested parties for review and comment before they are filed with the Ohio General Assembly's Joint Committee on Agency Rule Review (JCARR). Ohio EPA considers comments received from this preliminary review and makes changes to the rules as appropriate.

The following draft rules have been distributed to interested parties for review and comment:


Proposed 'Amend' Rulemaking – Backflow Prevention and Cross Connection Control


Proposed 'Amend' Rulemaking Governing Contingency Plans Rule

Public Notice: DDAGW seeks comments on proposed rulemaking governing the Contingency Plans rule. Comments are due by October 18th, 2021.

Business Impact Analysis


Proposed 'Amend' Rulemaking – Emergency Loans

Public Notice: DDAGW seeks comments on proposed rulemaking governing the Emergency Loan rule. Comments are due by October 15th, 2021.

Business Impact Analysis


Proposed 'Amend' Rulemaking Governing Revised Total Coliform Rules

Public Notice: DDAGW seeks comments on proposed rulemaking governing several Revised Total Coliform rules. Comments are due by September 10th, 2021.

Business Impact Analysis

  • 3745-81-14 (Rescinded) Maximum contaminant levels for microbiological contaminants
  • 3745-81-21 (Rescinded) Coliform monitoring requirements
  • 3745-81-50 (Amend) General requirements
  • 3745-81-51 (Amend) Routine monitoring requirements
  • 3745-81-52 (Amend) Repeat monitoring and E. coli requirements
  • 3745-81-53 (No Change) Coliform treatment technique triggers and assessment requirements
  • 3745-81-54 (No Change) Violations
  • 3745-81-55 (Amend) Reporting and Recordkeeping

Draft for Interested Party – Updating Outdated Modes of Communication

The Division of Drinking and Ground Waters (DDAGW) has proposed changes to several rules in the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). Please see the Business Impact Analysis, proposed rule link, and fact sheet below.

Fact Sheet

Business Impact Analysis 3745-7-12

Business Impact Analysis 3745-34-40

Business Impact Analysis 3745-81-66

Business Impact Analysis 3745-89-08

Business Impact Analysis 3745-91

  • 3745-7-12 Suspension or revocation of certification
  • 3745-34-40 Seismic reflection survey requirements for class I wells
  • 3745-81-66 Source monitoring results and grandfathered data
  • 3745-89-08 Analysis and reporting/li>
  • 3745-91-02 Application for approval of plans
  • 3745-91-12 Certification by political subdivisions and investor-owned public utilities

Revisions to Harmful Algal Bloom Rules

DDAGW seeks comments on proposed rulemaking governing Harmful Algal Bloom rules. Comments are due by May 26, 2021. A draft of Ohio EPA Method 701.0 - Total (Extracellular and Intracellular) Microcystins - ADDA by ELISA Version 2.4 has also been provided below for reference.

Public Notice

Business Impact Analysis

Ohio EPA Method 701.0 - Total (Extracellular and Intracellular) Microcystins - ADDA by ELISA Version 2.4


Proposed 'No Changes' Rulemaking Governing Secondary Maximum Contaminant Levels Rules

Public Notice: DDAGW seeks comments on proposed rulemaking governing several Consumer Confidence Report rules. Comments are due by
July 2 ,2021.

Business Impact Analysis

Proposed Rules

Ohio EPA considers comments received during interested party review and makes changes to the rules as appropriate. These rules are then proposed and filed with the Ohio General Assembly's Joint Committee on Agency Rule Review (JCARR) and other agencies as required by Ohio Revised Code section 119.03. Another opportunity for public comment is offered. More information about proposed rules is on the Register of Ohio website.

The following proposed rules have been filed with JCARR:


Proposed 'No Change' Rulemaking – Primary Drinking Water Standards

The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to Primary Drinking Water Standards rules in chapter 3745-81 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). The rule was reviewed as a result of the five-year rule review requirements of Section 106.03 of the Revised Code. Please see the Business Impact Analysis and the proposed rule linked below.


Proposed 'No Change' Rulemaking – Secondary Maximum Contaminant Levels

The Division of Drinking and Ground Waters (DDAGW) has proposed "no changes" to Secondary Maximum Contaminant rules in chapter 3745-82 of the Ohio Administrative Code (OAC) to Joint Committee on Agency Rule Review (JCARR). The rule was reviewed as a result of the five-year rule review requirements of Section 106.03 of the Revised Code. Please see the Business Impact Analysis and the proposed rule inked below.

Public Notice

Business Impact Analysis

  • 3745-82-01 Definitions
  • 3745-82-03 Monitoring for Compliance with Secondary Maximum Contaminant Levels
  • 3745-82-04 Monitoring for Compliance with the Flouride Secondary Maximum Contaminant Levels

Proposal of Revised Rules- Primary Drinking Water Standards

The Division of Drinking and Ground Waters (DDAGW) has proposed revisions to several Primary Drinking Water Standard rules in Chapter 3745-81 of the Administrative Code to Joint Committee on Agency Rule Review (JCARR). The proposed amendments are a result of the five-year rule review requirements of Section 106.03 of the Ohio Revised Code (ORC).

Ohio EPA will be holding a public hearing on the revised rules on Feburay 26th, at 10.30 am at Ohio EPA Central office, Columbus, Ohio. Please see the public hearing notice, proposed rule language and the Business Impact Analysis (Linked below) for information on the changes and how to submit comments/attend the hearing.

Public Notice

Business Impact Analysis

  • 3745-81-23 Inorganic Chemical Monitoring Requirements (Amend)
  • 3745-81-31 Reporting Requirements for Public Water Systems (Amend)
  • 3745-81-33 Record Maintenance (Amend)
  • 3745-81-67 LT2 Bin Classification and Treatment Technique Requirements (Amend)
  • 3745-81-68 Microbial Toolbox Options for Meeting Cryptosporidium Treatment Requirements (Amend)

Effective Rules

Ohio Administrative Code (OAC) rules administered by the Division of Drinking and Ground Waters (DDAGW) are located on this page. These include rules for Ohio public drinking water systems adopted under Ohio Revised Code (ORC) chapter 6109, and rules for Underground Injection Control, adopted under ORC section 6111.043. 

Ohio EPA also issues policy and guidance documents related to the implementation of rules in the safe drinking water program. 

View effective rules by subject matter by clicking on an OAC Chapter below or click All DDAGW Rules for a complete copy of all effective drinking and ground water rules. (Last revised Nov. 27, 2018)

Chapter 3745-7: Operator Certification for Public Water Systems and Wastewater Treatment Works

  • 3745-7-01 (Aug. 15, 2018) Professional operator certification definitions
  • 3745-7-02 (Aug. 15, 2018) Certified professional operators of record
  • 3745-7-03 (Aug. 15, 2018) Public water system classification and staffing requirements
  • 3745-7-04 (Aug. 15, 2018) Treatment works and sewerage system classification and staffing requirements
  • 3745-7-05 (Aug. 15, 2018) Classification of professional operator certification
  • 3745-7-06 (Aug. 15, 2018) Certification of professional operators
  • 3745-7-07 (Aug. 15, 2018) Professional operator in training
  • 3745-7-09 (Aug. 15, 2018) Record-keeping requirements and responsibilities of owners, certified professional operators and certified professional operators of record
  • 3745-7-10 (Aug. 15, 2018) Professional operator certification advisory council
  • 3745-7-11 (Aug. 15, 2018) Duties of the council
  • 3745-7-12 (Aug. 15, 2018) Suspension or revocation of certification
  • 3745-7-13 (Aug. 15, 2018) Reciprocity
  • 3745-7-15 (Aug. 15, 2018) Expiration and renewal of professional operator certification
  • 3745-7-17 (Aug. 15, 2018) Professional operator certification fees.
  • 3745-7-18 (Aug. 15, 2018) Conduct during the application and examination process
  • 3745-7-19 (Aug. 15, 2018) Examination providers
  • 3745-7-20 (Aug. 15, 2018) Certification of Operators Who Pass an Examination From an Approved Examination Provider
  • 3745-7-21 (Aug. 15, 2018) Contract operations companies and contracted professional operators

Chapter 3745-9: Water Well Standards

  • 3745-9-01 (June 13, 2016) Well Standard Definitions
  • 3745-9-02 (June 13, 2016) Scope and Exemptions
  • 3745-9-03 (June 13, 2016) Monitoring Well  
  • 3745-9-04 (June 13, 2016) Well Siting  
  • 3745-9-05 (June 13, 2016) Well Construction
  • 3745-9-06 (June 13, 2016) Well Construction, Specific Geologic Conditions
  • 3745-9-07 (June 13, 2016) Well Grouting for Construction or Sealing
  • 3745-9-08 (June 13, 2016) Well Disinfection
  • 3745-9-09 (June 13, 2016) Well Development and Pumping Test
  • 3745-9-10 (June 13, 2016) Abandoned Well Sealing

Chapter 3745-34: Underground Injection Control

  • 3745-34-01 (Nov. 11, 2016) Definitions
  • 3745-34-02 (July 25, 1984) Considerations Under Federal Law
  • 3745-34-03 (Nov. 1, 2018) Confidentiality of Information
  • 3745-34-04 (Nov. 11, 2016) Classification of Wells
  • 3745-34-05 (July 25, 1984) Identification of Underground Sources of Drinking Water
  • 3745-34-06 (July 25, 1984) Prohibition of Unauthorized Injection
  • 3745-34-07 (April 23, 2009) Prohibition of Movement of Fluid Into Underground Injection
  • 3745-34-08 (Nov. 11, 2016) Prohibition of Class IV Wells
  • 3745-34-09 (Feb. 14, 2021) Requirements for Wells Injecting Hazardous Wastes
  • 3745-34-10 (Aug. 15, 2018) Waiver of Requirement by Director
  • 3745-34-11 (May 2, 2011) Class V Wells
  • 3745-34-12 (Nov. 11, 2016) Application by Permit; Authorization by Permit
  • 3745-34-13 (April 23, 2009) Class I Permit Application
  • 3745-34-14 (April 23, 2009) Class I Permit to Drill Applications
  • 3745-34-15 (April 23, 2009) Class I Permit to Operate Applications  
  • 3745-34-16 (April 23, 2009) Class V Permit Requirements
  • 3745-34-17 (April 23, 2009) Signatories to Permit Applications and Reports
  • 3745-34-18 (Jan. 20, 1995) Class V Injection Well Area Permits
  • 3745-34-19 (July 25, 1984) Emergency Permits
  • 3745-34-20 (Nov. 9, 1984) Effect of a Permit
  • 3745-34-21 (Feb. 14, 2021) Duration of Permits
  • 3745-34-22 (July 25, 1984) Transfer of Permits
  • 3745-34-23 (Nov. 11, 2016) Modification or Revocation and Re-issuance of Permits
  • 3745-34-24 (July 25, 1984) Termination of Permits
  • 3745-34-25 (July 25, 1984) Minor Modifications of Permits
  • 3745-34-26 (Jan. 20, 1995) Conditions Applicable to All Permits
  • 3745-34-27 (March 11, 2002) Establishing Drilling Permit and Injection Permit Conditions
  • 3745-34-28 (July 25, 1984) Schedule of Compliance
  • 3745-34-29 (July 25, 1984) Requirements for Recording and Reporting of Monitoring Results
  • 3745-34-30 (July 25, 1984) Plan of Corrective Action
  • 3745-34-32 (April 23, 2009) Area of Review
  • 3745-34-33 (July 25, 1984) Corrective Action
  • 3745-34-34 (Nov. 11, 2016) Mechanical Integrity
  • 3745-34-35 (April 23, 2009) Criteria for Establishing Permitting Priorities
  • 3745-34-36 (July 25, 1984) Plugging and Abandoning Class I Wells
  • 3745-34-37 (July 25, 1984) Construction Requirements for Class I Wells
  • 3745-34-38 (Dec. 16, 1991) Operating, Monitoring and Reporting Requirements for Class I Wells
  • 3745-34-39 (April 23, 2009) Information to be Considered by the Director in Authorizing Class I Wells
  • 3745-34-40 (Nov. 11, 2016) Seismic Reflection Survey Requirements for Class I Wells
  • 3745-34-50 (Dec. 16, 1991) Criteria and Standards for Class I Injection Wells
  • 3745-34-51 (Jan. 24, 2000) Minimum Criteria for Siting Class I Hazardous Waste Injection Wells
  • 3745-34-52 (Dec. 16, 1991) Area of Review
  • 3745-34-53 (Dec. 16, 1991) Corrective Action for Wells in the Area of Review
  • 3745-34-54 (April 23, 2009) Construction Requirements
  • 3745-34-55 (Dec. 16, 1991) Logging, Sampling and Testing Prior to New Well Operation
  • 3745-34-56 (Dec. 16, 1991) Operating Requirements
  • 3745-34-57 (Dec. 1, 1993) Testing and Monitoring Requirements
  • 3745-34-58 (Dec. 16, 1991) Reporting Requirements
  • 3745-34-59 (April 23, 2009) Information to be Evaluated by the Director
  • 3745-34-60 (Dec. 16, 1991) Closure
  • 3745-34-61 (Dec. 16, 1991) Post Closure
  • 3745-34-62 (Dec. 16, 1991) Financial Responsibility for Closure and Post Closure Care
  • 3745-34-63 (Feb. 14, 2021) Class I Annual Permit Fee; Fee Per Ton of Waste Injected

Chapter 3745-81: Primary Drinking Water Standards

  • 3745-81-01 (May 1, 2018) Primary Drinking Water Standards Definitions
  • 3745-81-02 (Nov. 8, 2018) Coverage
  • 3745-81-03 (Dec. 27, 1978) Siting Requirements
  • 3745-81-04 (May 1, 2018) Administrative Penalties  
  • 3745-81-10 (Jan. 1, 2010) Maximum Residual Disinfectant Levels
  • 3745-81-11 (Feb. 22, 2010) Maximum Contaminant Levels and Best Available Technologies for Inorganic Contaminants
  • 3745-81-12 (April 1, 2016) Maximum Contaminant Levels and Best Available Technologies for Organic Contaminants
  • 3745-81-14 (April 1, 2016) Maximum Contaminant Levels for Microbiological Contaminants
  • 3745-81-15 (Feb. 23, 2015) Maximum Contaminant Levels and Best Available Technologies for Radionuclide Contaminants
  • 3745-81-17 (Sept. 13, 1993) Treatment Techniques
  • 3745-81-19 (Feb. 22, 2010) Use of Non-centralized Treatment Devices
  • 3745-81-21 (April 1, 2016) Coliform Monitoring Requirements
  • 3745-81-23 (Jan. 1, 2010) Inorganic Chemical Monitoring Requirements
  • 3745-81-24 (Jan. 1, 2021) Organic Chemical Monitoring Requirements   
  • 3745-81-26 (Feb. 23, 2015) Radionuclide Monitoring Requirements
  • 3745-81-27 (Oct. 26, 2020) Analytical Techniques
  • 3745-81-28 (Oct. 26, 2020) Acceptability of Analytical Results
  • 3745-81-29 (Dec. 27, 1978) Monitoring of Consecutive Public Water Systems
  • 3745-81-31 (Jan. 1, 2010) Reporting Requirements for Public Water Systems
  • 3745-81-32 (April 1, 2016) Public Notification
  • 3745-81-33 (Feb. 23, 2015) Record Maintenance
  • 3745-81-41 (April 1, 2016) Ground Water Rule - General Requirements and Applicability
  • 3745-81-42 (April 1, 2016) Ground Water Rule - Ground Water Source Microbial Monitoring and Analytical Methods
  • 3745-81-43 (April 1, 2016) Ground Water Rule - Treatment Technique Requirements for Ground Water Systems
  • 3745-81-44 (April 1, 2016) Ground Water Rule - Treatment Technique Violations for Ground Water Systems
  • 3745-81-45 (April 1, 2016) Ground Water Rule - Reporting and Recordkeeping for Ground Water Systems
  • 3745-81-50 (April 1, 2016) Revised Total Coliform Rule - General Monitoring Requirements
  • 3745-81-51 (April 1, 2016) Revised Total Coliform Rule - Routine Monitoring Requirements
  • 3745-81-52 (April 1, 2016) Revised Total Coliform Rule - Repeat Monitoring and E. coli Requirements
  • 3745-81-53 (April 1, 2016) Revised Total coliform Rule - Coliform Treatment Technique Triggers and Assessment Requirements
  • 3745-81-54 (April 1, 2016) Revised Total Coliform Rule - Violations
  • 3745-81-55 (April 1, 2016) Revised Total Coliform Rule - Reporting and Recordkeeping
  • 3745-81-60 (April 1, 2016) Inspections and response requirements.
  • 3745-81-61 (April 1, 2016) Treatment Technique Requirements for Significant Deficiencies
  • 3745-81-64 (Jan. 8, 2010) General Requirements of the "Long Term 2 Enhanced Surface Water Treatment (LT2) Rule"
  • 3745-81-65  (Oct. 5, 2013) Source Monitoring Requirements
  • 3745-81-66  (Oct. 5, 2013) Source Monitoring Results and Grandfathered Data
  • 3745-81-67 (Jan. 8,  2010) LT2 Bin Classification and Treatment Technique Requirements
  • 3745-81-68 (Jan. 8, 2010) Microbial Toolbox Options for Meeting Cryptosporidium Treatment Requirements
  • 3745-81-69 (Jan. 8, 2010) Reporting and Record-keeping Requirements for LT2 Only
  • 3745-81-70 (April 1, 2016) Monitoring Requirements for Disinfectant Residuals
  • 3745-81-71 (Oct. 5, 2013) General Requirements for Filtration and Disinfection of Surface Water Sources
  • 3745-81-72 (Oct. 5, 2013) Disinfection of Water from Surface Water Sources
  • 3745-81-73 (Oct. 5, 2013) Filtration of Water From Surface Water Sources
  • 3745-81-74 (May 12, 2016) Turbidity and Disinfection Monitoring Requirements for Surface Water Systems
  • 3745-81-75 (Oct. 5, 2013) Reporting and Record-keeping Requirements
  • 3745-81-76 (Aug. 1, 2014) Water Source Designation
  • 3745-81-77 (Jan. 1, 2010) Treatment Techniques for Control of Disinfection Byproduct (DBP) Precursors
  • 3745-81-79 (Oct. 5, 2013) Filter Backwash Recycling
  • 3745-81-80 (May 1, 2018) Control of Lead and Copper - General Requirements
  • 3745-81-81 (May 1, 2018) Control of Lead and Copper; Applicability of Corrosion Control Treatment Steps to Small, Medium-size and Large Water Systems.
  • 3745-81-82 (July 24, 2009) Control of Lead and Copper; Description of Corrosion Control Treatment Requirements  
  • 3745-81-83 (July 24, 2009) Control of Lead and Copper; Source Water Treatment Requirements
  • 3745-81-84 (May 1, 2018) Control of Lead and Copper - Lead Service Line Replacement Requirements
  • 3745-81-85 (May 1, 2018) Control of Lead and Copper - Public Education, Supplemental Monitoring Requirements and Consumer Notification of Results
  • 3745-81-86 (May 1, 2018) Control of Lead and Copper - Monitoring Requirements for Lead and Copper in Tap Water
  • 3745-81-87 (May 1, 2018) Control of Lead and Copper - Monitoring Requirements for Water Quality Parameters
  • 3745-81-88 (July 24, 2009) Control of Lead and Copper - Monitoring Requirements for Lead and Copper in Water Entering the Distribution System
  • 3745-81-89 (May 1, 2018) Analytical Methods
  • 3745-81-90 (May 1, 2018) Control of Lead and Copper - Reporting and Record-keeping Requirements

Chapter 3745-82: Secondary Contaminant Standards

  • 3745-82-01 (Oct. 1, 2006) Definitions
  • 3745-82-02 (Sept. 13, 1993) Secondary Maximum Contaminant Levels
  • 3745-82-03 (Aug. 5, 2016) Monitoring for Compliance with Secondary Maximum Contaminant Levels
  • 3745-82-04 (Aug 5, 2016) Monitoring for Compliance with the Fluoride Secondary Maximum Contaminant Level

Chapter 3745-83: Operational Requirements

  • 3745-83-01 (March 4, 2016) Operational Requirements
  • 3745-83-02 (Nov. 1, 2018) Water distribution system disruption of service.  

Chapter 3745-84: Public Water System Licenses

  • 3745-84-01 (July 1, 2014) Definitions
  • 3745-84-02 (July 1, 2014) Application for a License to Operate or Maintain a Public Water System
  • 3745-84-03 (July 1, 2014) Expiration and Renewal of License to Operate or Maintain a Public Water System
  • 3745-84-04 (July 1, 2014) Format and Display of License to Operate or Maintain a Public Water System
  • 3745-84-05 (July 1, 2014) Fees for Operating or Maintaining a Public Water System
  • 3745-84-06 (July 1, 2014) Conditioning, Denial, Suspension or Revocation of a License to Operate or Maintain a Public Water System  

Chapter 3745-85: Contingency Plans

Chapter 3745-86: Emergency Loans

Chapter 3745-87: Asset Management Program

  • 3745-87-01 (Nov. 8, 2018) Asset Management Definitions
  • 3745-87-02 (Nov. 8, 2018) Applicability and general requirements
  • 3745-87-03 (Nov. 8, 2018) Contents of an asset management program
  • 3745-87-04 (Nov. 8, 2018) Evaluation criteria
  • 3745-87-05 (Nov. 8, 2018) Long-term implementation

Chapter 3745-88: Disadvantaged Community Loans

Chapter 3745-89: Laboratory Certification

  • 3745-89-01 (Oct. 26, 2020) Laboratory Certification Definitions  
  • 3745-89-02 (Oct. 26, 2020) Analyses Requiring Laboratory Certificate of Approval
  • 3745-89-03 (Oct. 26, 2020) Procedure for Laboratory Certification
  • 3745-89-04 (Oct. 26, 2020) Renewal of Laboratory Certification
  • 3745-89-05 (Oct. 26, 2020) Maintenance of a Laboratory Certification
  • 3745-89-06 (Oct. 26, 2020) Director's Actions for Laboratory Certification  
  • 3745-89-07 (Oct. 26, 2020) Laboratory Certificate Property of State; Display
  • 3745-89-08 (Oct. 26, 2020) Reporting of Analytical Results
  • 3745-89-09 (Oct. 26, 2020) Interim Authorization for Plant Control Tests or MMO-MUG (SM 9223) Tests
  • 3745-89-10 (Oct. 26, 2020) Interim Authorization for New Contaminants and New Methods
  • 3745-89-11 (Oct. 26, 2020) Certified Laboratories for the "Long Term 2 Enhanced Surface Water Treatment Rule"
  • 3745-89-12 (Oct. 26, 2020) Alternate acceptance of laboratory certification. to the laboratory certification chapter

Chapter 3745-90: Harmful Algal Blooms

  • 3745-90-01 (June 1, 2016) Harmful Algal Blooms - Definitions
  • 3745-90-02 (June 1, 2016) Harmful Algal Blooms - Applicability and Action Levels
  • 3745-90-03 (June 1, 2016) Harmful Algal Blooms - Monitoring
  • 3745-90-04 (June 1, 2016) Harmful Algal Blooms - Analytical Methods and Reporting
  • 3745-90-05 (June 1, 2016) Harmful Algal Blooms - Treatment Techniques
  • 3745-90-06 (June 1, 2016) Harmful Algal Blooms - Tier 1 Public Notification and Consumer Confidence Reports
  • 3745-90-07 (June 1, 2016) Harmful Algal Blooms - Recordkeeping

Chapter 3745-91: Plan Approval

  • 3745-91-01 (Dec. 31, 2006) Definitions
  • 3745-91-02 (June 13, 2016) Application for Approval of Plans
  • 3745-91-03 (June 13, 2016) Requirements for Plan Drawings
  • 3745-91-04 (Nov. 26, 1980) Requirements for Specifications
  • 3745-91-05 (Jan. 1, 2002) Requirements for Data Sheet
  • 3745-91-06 (April 19, 2012) Requirements for Supporting Information
  • 3745-91-07 (Jan. 1, 2002) Requirements for Submittal Letter
  • 3745-91-08 (June 13, 2016) Procedure for Approval; Changes
  • 3745-91-09 (Oct. 14, 2016) Iron and Manganese Treatment
  • 3745-91-10 (Sept. 1, 2009) Drinking Water Source Protection Plan
  • 3745-91-12 (Oct. 26, 2015) Certification by Political Subdivisions and Investor-owned Utilities

Chapter 3745-92: Escrow Requirements

  • 3745-92-01 (Nov. 26, 1980) Definitions
  • 3745-92-02 (Nov. 8, 2018) Financial assurance required
  • 3745-92-03 (Nov. 8, 2018) Amount of financial assurance
  • 3745-92-04 (Nov. 26, 1980) Release of Escrow
  • 3745-92-05 (Nov. 8, 2018) Orders of the director, notice to owner
  • 3745-92-06 (Nov. 26, 1980) Fee for Escrow Deposit  

Chapter 3745-95: Backflow Prevention and Cross-Connection Control

  • 3745-95-01 (Oct. 26, 2015) Backflow Prevention and Cross-Connection Control Definitions
  • 3745-95-02 (Oct. 26, 2015) Cross-connections
  • 3745-95-03 (Oct. 26, 2015) Surveys and Investigations
  • 3745-95-04 (Aug. 15, 2018) Where Protection is Required
  • 3745-95-05 (Oct. 26, 2015) Type of Protection Required
  • 3745-95-06 (Oct. 26, 2015) Backflow Prevention Devices
  • 3745-95-07 (Aug. 15, 2018) Booster Pumps
  • 3745-95-08 (Aug. 15, 2018) Violations
  • 3745-95-09 (April 19, 2012) Requirements for Yard Hydrants

Chapter 3745-96: Consumer Confidence Reports

  • 3745-96-01 (Oct. 26, 2015) Consumer Confidence Report Applicability and Definitions
  • 3745-96-02 (May 1, 2018 ) Required Report Content
  • 3745-96-03 (Oct. 31, 2010) Required Additional Health Information
  • 3745-96-04 (Oct. 26, 2015) Report Delivery and Record-keeping

Policies and Guidance

Currently effective policy and guidance documents related to the safe drinking water program are listed below by general topic.

Engineering

  • ENG-01-003: Guidelines for Clarifier and Granular Media Filter Ratings at Surface Water Treatment Plants
  • ENG-02-001: Guidelines for Treatment Process Ratings at Precipitative (e.g., Lime) Softening Ground Water Plants
  • ENG-03-002: Detail Plan Submission Guidance for Non-community Public Water Systems
  • ENG-05-001: Guidelines for Obtaining Approval of Membranes to Meet Particulate and Microbiological Removal Requirements for Surface Water
  • ENG-06-001: Guideline for Evaluation and Implementation of Chloramination
  • ENG-07-001: Guidelines for Obtaining Approval of Membranes to Meet Treatment Requirements for Ground Water Treatment
  • ENG-08-002: Policy for Determining the Acceptability of ASTM Pipe in Lieu of AWWA Pipe for Public Water Systems
  • ENG-09-001: Guidelines for Evaluating Granular Activated Carbon (GAC) for Disinfection By-product (DBP) Precursor Removal
  • ENG-10-001: Guidance for Installation of Automatic Flush Hydrants in Distribution Systems
  • ENG-12-001: Guidelines for Demonstration of On-site Sodium Hypochlorite Generators to Meet Inactivation/Disinfection Requirements of Drinking Water
  • ENG-13-001: Guidelines for Obtaining Secondary Filtration Credit for Compliance with the LT2 Rule
  • ENG-16-001: Guidelines for Agreements for Self-Certification of Distribution System Plans by Public Water Systems
  • ENG-18-001: Guidance for High Rate Filtration for Iron and Manganese Removal at Groundwater Treatment Plants
  • ENG-9119-GD: Guidelines for Determining when Source and Treatment Changes Trigger Optimal Corrosion Control Evaluation
  • ENG-9120-PO: Guidelines for Obtaining Approval of Backflow Prevention Methods in Drinking Water Treatment Plants (Ver.08/15/2019)

Ground Water

In addition to providing the guidance documents listed below, the Division of Drinking and Ground Waters offers support to other Ohio EPA divisions on ground water issues. Click here to learn more.

Ground Water Wells

Agency-wide

Division of Materials and Waste Management (DMWM) Guidance Documents issued by DDAGW

Division of Surface Water (DSW) Guidance Documents issued by DDAGW

Laboratory Certification

  • LAB-01-002: Fluoride Proficiency Test for Drinking Water Laboratories

Operations

  • OPR-02-001: Chlorine Monitoring and Compliance Tracking for Ground Water Systems
  • OPR-03-001: Guidance for Flood Event Monitoring by Public Water Systems with Ground Water Sources
  • OPR-05-002: Disinfection of Finished Water Storage Facilities & Water Mains
  • OPR-07-001: Asset Management Program - General Template Guidance
  • OPR-08-001: Asset Management Program - Small Community Guidance

Public Water Systems

  • PWS-01-003: Clarification of Public Water Systems Definition and Exemption Criteria
  • PWS-02-003​: Alternative to the Installation of an Approved Backflow Preventer on Service Connections Where There is an Auxiliary Water System
  • PWS-04-001: Guidelines for Lead Mapping in Distribution Systems
  • PWS-05-001: Guidelines for Mapping Lead Plumbing and Fixtures for Individual Buildings
  • PWS-06-001: Guidelines for Water Line Repairs and Replacements in Areas with Lead Service Lines

Water Quality

  • WQ-01-006: Guidance of Total Coliform Bacteria Monitoring for Small Public Water Systems (Population Less Than 3,301 Persons)  (Under Revision)
  • WQ-06-002: Limited Distribution of Public Notice
  • WQ-07-002: Tier 1 Public Notice Requirements 
  • WQ-13-002: Designation of Community Public Water Systems Vulnerable to Contamination from Beta Particle and Photon Radioactivity
  • WQ-14-001: Guidance for Compliance with Total Organic Carbon (TOC) Monitoring and Removal Requirements for Non-conventional Filtration Treatment at Surface Water Treatment Plants
  • WQ-17-001: Guidance for Ground Water Rule Triggered Source Water Monitoring (TSWM) Plans and Options for Reducing Samples
  • WQ-21-001: Guidance for Hydrogeologic Sensitivity Assessment
  • WQ-22-001: Guidance for Assessment Source Water Monitoring
    • Guidance for Hydrogeologic Sensitivity Assessment and Assessment Source Water Monitoring; Hydrogeologic Sensitivity Assessment and Assessment Source Water Monitoring Pilot Report 

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