Onsite Sewage Treatment & Dispersal Systems 

General Information

Onsite sewage treatment & dispersal systems are installed in areas where sanitary sewers are not available. The goal of these systems is the treatment of wastewater via mechanical and/or natural processes to the point where the treated wastewater can be safely released into the environment without causing harm to the surrounding environment and human health.

In addition to the specific onsite sewage treatment & dispersal system requirements listed here, applicant must provide all material included in How to Obtain a PTI.

Interim Onsite Sewage Treatment System Guidance Document  

Listing of SFOSTS (as of 10/17/07)

On January 1, 2007, Ohio Department of Health's rules for Small Flow Onsite Sewage Treatment Systems went into effect. Please visit the link below for a list of counties that have or will take on the SFOSTS:

http://www.odh.ohio.gov/odhPrograms/eh/sewage/sfosts1.aspx.

You can also view the following map.

For additional information on SFOSTS, please visit:

http://www.odh.ohio.gov/odhPrograms/eh/sewage/sewrules.aspx.

Forms

Forms associated with onsite system projects.
(Download the appropriate forms from the PTI Forms page).

• Form A: Applicant information
• Form B2: Onsite Sewage Treatment & Dispersal Systems
• Form B8: Holding Tanks
• Antidegradation Addendum

Additional Onsite System Information

Pipe Specifications

Click HERE for a List of Pipe Specifications.

Soils Consideration

A soils evaluation must be submitted by a certified soil scientist or other qualified professionals. They must:

• Determine the depth to limiting condition and what it is
• Identify soils classification
• Identify soil horizons
• Estimate soil permeability rates in each horizon

Links to certified soil scientist & other qualified professionals

Click the following link to view the Professional Soil Scientists - Consultants List provided by The Association of Ohio Pedologists.

For other related topics: OAC 3745-42

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