State Requirements
Maryland Septic Tank Requirements
Complete guide to septic system requirements in Maryland (MD). Use our calculator for personalized recommendations.
Regulatory Agency
Maryland Department of the Environment
Permit Required
YesProfessional Install
RequiredMinimum Tank Size
1,000 gal
Tank Size Requirements
| Bedrooms | Min Tank Size | With Garbage Disposal |
|---|---|---|
| 3 | 1,250 gal | 1,875 gal |
| 4 | 1,500 gal | 2,250 gal |
| 1-2 | 1,000 gal | 1,500 gal |
| 5-6 | 2,000 gal | 3,000 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
325
sq ft minimum
Maryland Specific Notes
- Bay Restoration Fund fee applies
- Nitrogen-reducing systems may be required
- Critical Area regulations near Chesapeake Bay
Regulatory Contact
Maryland Department of the Environment
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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