Bolthole Index county-legal census · checked 2026-08-08
Septic permitting in Massachusetts is state-run, administered by state agencies across all 14 counties.Every entry below names the approving authority for that county, cited to the authority’s own page.
Septic rules change and some cities run their own programs — treat this as a verified starting point, not legal advice. All states → Full Massachusetts profile →
14 counties · state agency · permit status scouted for 2
Local Board of Health under MassDEP Title 5 (310 CMR 15.000)
Mass.gov - 310 CMR 15.000: Septic Systems (Title 5) ↗Local Board of Health under MassDEP (Title 5 / 310 CMR 15.000)
MassDEP Title 5 (310 CMR 15.000) ↗Massachusetts DEP - Title 5 (310 CMR 15.000), enforced locally by each municipal Board of Health
Mass.gov - Massachusetts law about Title 5 and septic systems ↗MassDEP Title 5 (310 CMR 15.000), enforced by the local Board of Health
Mass.gov - Septic Systems & Title 5 (MassDEP) ↗MassDEP Title 5 (310 CMR 15) enforced by the local Board of Health
Mass.gov - Massachusetts law about Title 5 and septic systems ↗MassDEP Title 5 (310 CMR 15.000), administered locally by each town's Board of Health
MassDEP - 310 CMR 15.000 Septic Systems (Title 5) ↗Local Board of Health under MassDEP Title 5 (310 CMR 15.000)
Mass.gov - 310 CMR 15.000: Septic Systems (Title 5) ↗Northampton Board of Health under Massachusetts Title 5 (310 CMR 15.000), MassDEP
Northampton Septic and Well Permits & Fees ↗Local Board of Health under MassDEP Title 5 (310 CMR 15.000)
Mass.gov - Title 5 and Septic Systems ↗Nantucket Board of Health (Title 5 / 310 CMR 15, MassDEP State Environmental Code)
Town of Nantucket Regulations - Septic Systems ↗MassDEP Title 5 (310 CMR 15.000), administered by the local Board of Health
MassDEP - 310 CMR 15.000 Septic Systems (Title 5) ↗Town Board of Health under MassDEP Title 5 (310 CMR 15.000)
Mass.gov — 310 CMR 15.000 Septic Systems (Title 5) ↗MassDEP Title 5 (310 CMR 15) enforced by the local Board of Health
Mass.gov - Massachusetts law about Title 5 and septic systems ↗Local Board of Health under Title 5 (310 CMR 15.00), MassDEP
MassDEP - Septic Systems (Title 5) ↗Every county here has a full profile — its index score, water, land prices, and the rest of its building rules. See the Massachusetts state page for all counties ranked, or the national septic guide.
General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
