Sewage Systems

Please do no flush wipes! Click here to read a special PSA from Seneca County Sewer District. 

Important Information for Homeowners Regarding Changes to the Household Sewer Treatment System Operation and Maintenance Program (Updated 07/30/19)

There are over 5,000  household sewage treatment systems in Seneca County that if properly maintained, can be a safe and effective mean of wastewater disposal.  However, failed or improperly discharging sewage systems can cause sewage to contaminate our surface and ground water, the same water that we all swim in and drink. 


The mission of the Seneca County General Health District is to minimize the threat of surface water and ground water contamination from malfunctioned or improperly designed, installed or maintained household sewage treatment systems (HSTS) in order to prevent disease transmission and to protect the quality of surface and ground water.  Seneca County General Health District performs inspections, regulates contractors, educates homeowners, and enforces sewage regulations.

Home Sewage Treatment System Grant

Eligible county residents could get financial assistance through a grant program administered by Seneca Regional Planning Commission on behalf of the Seneca County General Health District. The Home Sewage Treatment System grant is to assist income eligible homeowners in repairing failing septic systems. A pool of $150,000 is available and funding is dependent on household income. For more information or to see if you are eligible, contact Brittany Bisher at the Regional Planning office, (419) 443-7936, ext. 1108

HSTS 2nd Half Reminder Notices

Household Sewage Treatment System (HSTS) 2nd half Reminder Notices have been mailed out. All services must be completed by December 31, 2020 and inspection forms must be returned or post marked to the SCGHD NO LATER than January 15, 2021.

Please watch for one of the following:

  1. Green Card (Home Owner Leach Field Inspection)

  2. Tan Card (Septic Tank Pumping)

  3. Blue Card (Registered Service Provider Inspection/Maintenance)


For Homeowners

For Installers/Service Providers

System Installation
Department Info

To begin the process of installing a septic system please read the Homeowners guide to installation (2021).  This document is an overview of the process of installing a septic system.  The specific sewage rules for the Seneca County General Health District are available here.

Review fees and permitting fees associated with septic systems

Operation and Maintenance Program

71 South Washington Street

Suite 1102

Tiffin, OH 44883

(419) 447-3691 ext. 6321


Environmental Health Division

Seneca County General health District

71 South Washington Street

Suite 1102

Tiffin, OH  44883

Hours of Operation

All new septic systems installed after Jan. 1, 2007 are required to maintain an Operational Permit. Lot splits and real estate inspection requests will also require an Operation and Maintenance Permit (O&M) regardless of the systems age. The SCGHD is continually expanding the O&M program (as required by law) and eventually every Home Sewage Treatment System (HSTS) in Seneca County will need to have an O&M permit. The Operational Permit outlines what specific inspections are required to ensure your septic system is operating properly.  Depending on the type of septic system installed, registered service providers may be required to perform these inspections.  Septic tanks are also required to be pumped on a regular basis as determined in the O&M permit.  A list of licensed pumpers can be found here. 

The Seneca County General Health District(SCGHD) is beginning the process of renewing the Operation and Maintenance permits that were purchased in 2015.  These permits have a 5 year effective time frame and are now requiring renewal, the renewal fee is $175 and the permit is good for an additional 5 years.  If renewal fee is not paid and permit returned inspections will continue to be required and appropriate penalties will be imposed.

Monday - Friday

8:00 AM - 4:30 PM

Sewage Nuisances

The discharge of untreated sewage to the ground surface or a ditch poses not only a pollution issue but a public health concern with disease transmission.  Our department receives dozens of calls and reports annually from private citizens and others about suspected sewage nuisances.  Anonymous complaints are accepted, and may be submitted here.

Real Estate Transactions

When homeowners sell their property, many lending institutions require that the sewage system be evaluated/inspected to assure the system is functioning properly for the new buyer.  Our Health Department staff conducts dozens of these evaluations annually.  Please contact our office for the information that needs to be completed and for the associated fee for this evaluation.  For more information, visit our Real Estate Program page.

© 2018 Seneca County General Health District 

71 South Washington St. Suite 1102 Tiffin, OH 44883

In the event of a public health emergency* the Seneca County General Health District can be contacted at anytime.

During regular business hours please call (419) 447-3691.

Regular business hours are Monday - Friday.

Nursing & Vital Statistics: 8:00 a.m. - 4:00 p.m.

Environmental: 8:00 a.m. - 4:30 p.m.

WIC: M-W 8:30 a.m. - 4:30 p.m., Thu. 8:30 a.m. - 7:00 p.m., Fri. 8:30 a.m. - 1:00 p.m.

After business hours, weekends, and holidays please contact the SCGHD Health Commissioner via the Seneca County Sheriff's Office at (419) 447-3456


*A public health emergency includes Class A reportable disease, foodborne illness, and bioterrorism event.  

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