Water quality in Chatham, Massachusetts
Chatham 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 |
|---|---|---|---|---|
| Harwich Water Department Harwich |
39,144 | 0 | 4.0 mi | |
| Orleans Water Department Orleans |
17,460 | 1 | 5.4 mi | |
| Brewster Water Department Brewster |
35,000 | 2 | 5.5 mi | |
| Dennis Water District Dennis |
65,000 | 0 | 9.1 mi | |
| Town of Eastham Eastham |
6,199 | 0 | 9.7 mi | |
| Yarmouth Water Department Yarmouth |
38,900 | 1 | 12.1 mi | |
| Massasoit Hills Trailer Park Wellfleet |
120 | 1 | 12.4 mi | |
| Pleasant Water Wellfleet |
200 | 1 | 14.7 mi | |
| Wellfleet Apartments Wellfleet |
48 | 1 | 15.7 mi | |
| Barnstable Fire District Barnstable |
5,400 | 0 | 16.0 mi | |
| Harborside Village Wellfleet |
165 | 0 | 16.3 mi | |
| Hyannis Water System, Town of Barnstable Barnstable |
35,000 | 1 | 16.3 mi | |
| Wellfleet Municipal Water System Wellfleet |
750 | 1 | 16.9 mi | |
| Centerville Osterville Marstons Mills WD Barnstable |
50,000 | 2 | 20.7 mi | |
| Stones Throw Condos Truro |
80 | 0 | 22.1 mi | |
| Cotuit Fire District Water Department Barnstable |
4,938 | 0 | 23.9 mi | |
| Beechwood Point Condos Mashpee |
112 | 1 | 24.5 mi | |
| Sea Oaks Condominiums Mashpee |
222 | 0 | 25.3 mi | |
| Sandwich Water District Sandwich |
23,000 | 1 | 25.3 mi | |
| Provincetown Water Department Provincetown |
22,250 | 0 | 25.5 mi | |
| Mashpee Water District Mashpee |
36,922 | 0 | 26.4 mi | |
| Upper Cape Regional Water Cooperative Sandwich |
56,250 | 0 | 26.6 mi | |
| Otis Air National Guard Base Falmouth |
6,000 | 2 | 27.8 mi | |
| North Sagamore Water District Bourne |
4,668 | 0 | 29.0 mi | |
| Barnstable County Jail Bourne |
600 | 1 | 30.2 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 Chatham 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.