Falmouth MA Septic: Title 5 and Nitrogen Rules
What the nitrogen rules and the town's own wastewater plans mean for a septic system in Falmouth, plus pumping, inspections and repairs.
Nitrogen rules and sewer plans in Falmouth
The obligation sits with owners here
Falmouth sits inside the designated area, and with no town sewer programme to fall back on, the obligation here rests with individual property owners.
For Falmouth the designation date is July 7, 2023. The requirement to install Best Available Nitrogen Removal Technology (BANRT) began on July 8, 2025, and the upgrade window runs to July 7, 2028.
The designated systems in Falmouth
MassDEP designates by estuary system, not by town line. 10 systems are in Falmouth are on the list, and a property counts as inside a designated area based on which watershed it drains into.
| Estuary system | Nitrogen TMDL | Designated |
|---|---|---|
| Falmouth Inner Harbor Estuarine System | TMDL Completed, 2020 | July 7, 2023 |
| Fiddlers Cove & Rands Harbor Embayment Systems | TMDL Completed, 2018 | July 7, 2023 |
| Great, Green, and Bournes Pond Embayment Systems | TMDL Completed, 2007 | July 7, 2023 |
| Little Pond System | TMDL Completed, 2008 | July 7, 2023 |
| Megansett-Squeteague Harbor Estuarine System | TMDL Completed, 2020 | July 7, 2023 |
| Oyster Pond System | TMDL Completed, 2008 | July 7, 2023 |
| Quissett Harbor Embayment System | TMDL Completed, 2018 | July 7, 2023 |
| Waquoit Bay & Eel Pond Embayment System | TMDL Completed, 2020 | July 7, 2023 |
| West Falmouth Harbor | TMDL Completed, 2008 | July 7, 2023 |
| Wild Harbor Embayment System | TMDL Completed, 2018 | July 7, 2023 |
- Fiddlers Cove & Rands Harbor Embayment Systems — Fiddlers Cove and Rands Harbor Embayment Systems TMDL for Nitrogen (Total)
- Megansett-Squeteague Harbor Estuarine System — Nitrogen TMDL Report for Megansett-Squeteague Harbor Estuarine System
- Wild Harbor Embayment System — Wild Harbor Embayment System TMDLs for Nitrogen (Total)
- West Falmouth Harbor — Nitrogen TMDL for West Falmouth Harbor
- Quissett Harbor Embayment System — Quissett Harbor Embayment System Total Maximum Daily Loads for Nitrogen (Total)
- Oyster Pond System — Nitrogen TMDL for Oyster Pond
Whether a specific address falls inside a designated area is a question with a definite answer. MassDEP publishes a Natural Resource Nitrogen Sensitive Area map you can check parcel by parcel, and the town is the authority on its own permit status.
MassDEP Nitrogen Sensitive Area map · then confirm the permit position with the Falmouth Board of Health.
Local status as of 2026-09-20. Town programmes and permit positions change; the town is the authority on its own.