Water quality for ZIP code 02638
ZIP 02638 covers Dennis and East Dennis in Barnstable County, Massachusetts, one of 47 ZIP codes in the 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 |
|---|---|---|---|---|
| Yarmouth Water Department Yarmouth |
38,900 | 1 | 3.8 mi | |
| Barnstable Fire District Barnstable |
5,400 | 0 | 5.8 mi | |
| Brewster Water Department Brewster |
35,000 | 2 | 6.7 mi | |
| Harwich Water Department Harwich |
39,144 | 0 | 7.3 mi | |
| Hyannis Water System, Town of Barnstable Barnstable |
35,000 | 1 | 7.4 mi | |
| Centerville Osterville Marstons Mills WD Barnstable |
50,000 | 2 | 11.0 mi | |
| Chatham Water Department Chatham |
30,000 | 0 | 11.3 mi | |
| Orleans Water Department Orleans |
17,460 | 1 | 11.7 mi | |
| Town of Eastham Eastham |
6,199 | 0 | 13.3 mi | |
| Beechwood Point Condos Mashpee |
112 | 1 | 14.4 mi | |
| Cotuit Fire District Water Department Barnstable |
4,938 | 0 | 14.4 mi | |
| Sandwich Water District Sandwich |
23,000 | 1 | 14.5 mi | |
| Massasoit Hills Trailer Park Wellfleet |
120 | 1 | 14.7 mi | |
| Sea Oaks Condominiums Mashpee |
222 | 0 | 15.6 mi | |
| Upper Cape Regional Water Cooperative Sandwich |
56,250 | 0 | 15.6 mi | |
| Pleasant Water Wellfleet |
200 | 1 | 16.0 mi | |
| Harborside Village Wellfleet |
165 | 0 | 16.2 mi | |
| Wellfleet Apartments Wellfleet |
48 | 1 | 16.7 mi | |
| Wellfleet Municipal Water System Wellfleet |
750 | 1 | 16.9 mi | |
| Mashpee Water District Mashpee |
36,922 | 0 | 16.9 mi | |
| Otis Air National Guard Base Falmouth |
6,000 | 2 | 17.1 mi | |
| North Sagamore Water District Bourne |
4,668 | 0 | 18.0 mi | |
| Schooner Pass Trustees Condominiums Bourne |
136 | 0 | 19.6 mi | |
| Barnstable County Jail Bourne |
600 | 1 | 19.7 mi | |
| Stones Throw Condos Truro |
80 | 0 | 20.7 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, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.