Water quality for ZIP code 02639
ZIP 02639 covers Dennis Port, West Dennis, and Northwest Harwich 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 |
|---|---|---|---|---|
| Harwich Water Department Harwich |
39,144 | 0 | 4.1 mi | |
| Yarmouth Water Department Yarmouth |
38,900 | 1 | 4.4 mi | |
| Brewster Water Department Brewster |
35,000 | 2 | 6.7 mi | |
| Chatham Water Department Chatham |
30,000 | 0 | 7.9 mi | |
| Hyannis Water System, Town of Barnstable Barnstable |
35,000 | 1 | 8.4 mi | |
| Barnstable Fire District Barnstable |
5,400 | 0 | 8.6 mi | |
| Orleans Water Department Orleans |
17,460 | 1 | 11.1 mi | |
| Centerville Osterville Marstons Mills WD Barnstable |
50,000 | 2 | 12.8 mi | |
| Town of Eastham Eastham |
6,199 | 0 | 14.2 mi | |
| Cotuit Fire District Water Department Barnstable |
4,938 | 0 | 15.9 mi | |
| Massasoit Hills Trailer Park Wellfleet |
120 | 1 | 16.3 mi | |
| Beechwood Point Condos Mashpee |
112 | 1 | 16.7 mi | |
| Sea Oaks Condominiums Mashpee |
222 | 0 | 17.3 mi | |
| Sandwich Water District Sandwich |
23,000 | 1 | 17.9 mi | |
| Pleasant Water Wellfleet |
200 | 1 | 18.1 mi | |
| Mashpee Water District Mashpee |
36,922 | 0 | 18.4 mi | |
| Harborside Village Wellfleet |
165 | 0 | 19.0 mi | |
| Wellfleet Apartments Wellfleet |
48 | 1 | 19.0 mi | |
| Upper Cape Regional Water Cooperative Sandwich |
56,250 | 0 | 19.6 mi | |
| Wellfleet Municipal Water System Wellfleet |
750 | 1 | 19.6 mi | |
| Otis Air National Guard Base Falmouth |
6,000 | 2 | 20.2 mi | |
| North Sagamore Water District Bourne |
4,668 | 0 | 22.2 mi | |
| Barnstable County Jail Bourne |
600 | 1 | 22.5 mi | |
| Schooner Pass Trustees Condominiums Bourne |
136 | 0 | 23.3 mi | |
| Bourne Water District Bourne |
22,500 | 0 | 24.1 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.