Is Dennis, MA tap water safe?
The short answer
Dennis Water District serves Dennis. In EPA’s and Massachusetts’s records it has nothing above a health goal, and no health-based violation since 2016.
That data covers what its report lists, not everything.
Some homes in a town are on private wells or a small system of their own. The name on your water bill tells you which is yours.
Water testing near Dennis
The 3 labs Massachusetts certifies closest to Dennis, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Barnstable County Health & Env Dept
Barnstable, MA · about 6 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
Envirotech Laboratories Inc.
Sandwich, MA · about 14 miles
Certified for bacteria, nitrate, minerals and other inorganics
Eurofins Providence (AB)
Middleborough, MA · about 36 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
ZIP codes in Dennis
Which ZIP codes are in Dennis: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: MassDEP Online Searchable Laboratory Certification Listing, potable water; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Dennis
Other towns in Barnstable County with a page of their own.
What to do next
- Read Dennis Water District’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water