Onsite Sewage (Septic) Systems Program



The Marion County Public Health Department (MCPHD) works to prevent the spread of disease by ensuring proper design, construction, operation and closure of onsite wastewater systems – or as they’re more commonly known, septic systems. The program partners within Citizens Energy Group’s Septic Tank Elimination Program (STEP) that brings sewers into areas of Marion County currently serviced by septic systems.



Marion County Ordinance– The Code, Chapter 14

Residential Onsite Sewage Systems– 410IAC 6-8.3

Commercial Onsite Wastewater Disposal– 410IAC 6-10.1



A permit for new construction and repair of existing septic systems is required and must meet the standards in 410 IAC and Chapter 14 of the Code of the Health and Hospital Corporation of Marion County. Septic installers must be certified by the Indiana Onsite Wastewater Professional Association (IOWPA).

MCPHD Pre-Construction Checklist


IOWPA List of Certified Installers 


Septic Tank Elimination Program (STEP)

The Marion County Public Health Department conducts failure rate surveys for areas still served by onsite sewage disposal systems. These surveys play a role in prioritizing STEP projects. Once projects are completed sewer connections are mandatory under state and local ordinances.

Citizens Energy Group STEP


Additional Resources

New Homebuyer’s Guide to Septic Systems¬†

Septic Systems Do’s and Dont’s

EPA’s A Homeowner’s Guide to Septic Systems

Indiana Onsite Wastewater Professionals Association (IOWPA)

Indiana State Dept. of Health Page

Centers for Disease Control Page

Indiana Neighborhood Housing Partnership (INHP)

Marion County Soil &Water Conservation District


Questions and complaints can be directed to:

Department of Water Quality & hazardous Materials Management

3901 Meadows Dr., 2nd floor, Indianapolis, IN 46205

Phone: 317.221.2266