Water quality in Yarmouth, Massachusetts
Yarmouth is in Barnstable County. 124 active public water systems serve the county; 30 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Barnstable County
29 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Dennis Water District Dennis |
65,000 | 0 | 3.6 mi | |
| Barnstable Fire District Barnstable |
5,400 | 0 | 4.2 mi | |
| Hyannis Water System, Town of Barnstable Barnstable |
35,000 | 1 | 4.4 mi | |
| Harwich Water Department Harwich |
39,144 | 0 | 8.1 mi | |
| Centerville Osterville Marstons Mills WD Barnstable |
50,000 | 2 | 8.6 mi | |
| Brewster Water Department Brewster |
35,000 | 2 | 9.3 mi | |
| Cotuit Fire District Water Department Barnstable |
4,938 | 0 | 11.9 mi | |
| Chatham Water Department Chatham |
30,000 | 0 | 12.1 mi | |
| Beechwood Point Condos Mashpee |
112 | 1 | 12.4 mi | |
| Sea Oaks Condominiums Mashpee |
222 | 0 | 13.2 mi | |
| Sandwich Water District Sandwich |
23,000 | 1 | 13.6 mi | |
| Orleans Water Department Orleans |
17,460 | 1 | 14.2 mi | |
| Mashpee Water District Mashpee |
36,922 | 0 | 14.4 mi | |
| Upper Cape Regional Water Cooperative Sandwich |
56,250 | 0 | 15.3 mi | |
| Otis Air National Guard Base Falmouth |
6,000 | 2 | 15.9 mi | |
| Town of Eastham Eastham |
6,199 | 0 | 16.5 mi | |
| North Sagamore Water District Bourne |
4,668 | 0 | 18.0 mi | |
| Barnstable County Jail Bourne |
600 | 1 | 18.1 mi | |
| Massasoit Hills Trailer Park Wellfleet |
120 | 1 | 18.2 mi | |
| Schooner Pass Trustees Condominiums Bourne |
136 | 0 | 19.0 mi | |
| Pleasant Water Wellfleet |
200 | 1 | 19.6 mi | |
| Bourne Water District Bourne |
22,500 | 0 | 19.8 mi | |
| Harborside Village Wellfleet |
165 | 0 | 20.0 mi | |
| Falmouth Water Dept Falmouth |
97,551 | 0 | 20.3 mi | |
| Wellfleet Apartments Wellfleet |
48 | 1 | 20.4 mi |
Non-community systems in Barnstable County (94: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Barnstable County, nearest to Yarmouth first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision files or the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Massachusetts records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.