State Requirements
Ohio Septic Tank Requirements
Complete guide to septic system requirements in Ohio (OH). Use our calculator for personalized recommendations.
Regulatory Agency
Ohio Department of Health
Permit Required
YesProfessional Install
RequiredMinimum Tank Size
750 gal
Tank Size Requirements
| Bedrooms | Min Tank Size | With Garbage Disposal |
|---|---|---|
| 3 | 1,000 gal | 1,500 gal |
| 4 | 1,250 gal | 1,875 gal |
| 1-2 | 750 gal | 1,125 gal |
| 5-6 | 1,500 gal | 2,250 gal |
Drainfield Sizing by Soil Type
Minimum square feet of absorption area based on soil percolation rate:
Gravel/Sandy
125
sq ft minimum
Sandy
175
sq ft minimum
Loam
225
sq ft minimum
Clay
350
sq ft minimum
Ohio Specific Notes
- County health departments issue permits
- Clay soils common throughout state
- Operation and maintenance requirements
Regulatory Contact
Ohio Department of Health
Important Disclaimer
This information is provided for reference only. Local county or city requirements may be stricter than state minimums. Always verify requirements with your local health department before installation.
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