Water quality for ZIP code 02646
ZIP 02646 covers Harwich Port, Northwest Harwich, and Harwich Center 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 |
|---|---|---|---|---|
| Chatham Water Department Chatham |
30,000 | 0 | 4.6 mi | |
| Dennis Water District Dennis |
65,000 | 0 | 5.5 mi | |
| Brewster Water Department Brewster |
35,000 | 2 | 5.6 mi | |
| Yarmouth Water Department Yarmouth |
38,900 | 1 | 7.7 mi | |
| Orleans Water Department Orleans |
17,460 | 1 | 8.7 mi | |
| Hyannis Water System, Town of Barnstable Barnstable |
35,000 | 1 | 11.8 mi | |
| Barnstable Fire District Barnstable |
5,400 | 0 | 11.9 mi | |
| Town of Eastham Eastham |
6,199 | 0 | 12.5 mi | |
| Massasoit Hills Trailer Park Wellfleet |
120 | 1 | 14.9 mi | |
| Centerville Osterville Marstons Mills WD Barnstable |
50,000 | 2 | 16.2 mi | |
| Pleasant Water Wellfleet |
200 | 1 | 17.0 mi | |
| Wellfleet Apartments Wellfleet |
48 | 1 | 18.0 mi | |
| Harborside Village Wellfleet |
165 | 0 | 18.2 mi | |
| Wellfleet Municipal Water System Wellfleet |
750 | 1 | 18.8 mi | |
| Cotuit Fire District Water Department Barnstable |
4,938 | 0 | 19.3 mi | |
| Beechwood Point Condos Mashpee |
112 | 1 | 20.1 mi | |
| Sea Oaks Condominiums Mashpee |
222 | 0 | 20.7 mi | |
| Sandwich Water District Sandwich |
23,000 | 1 | 21.2 mi | |
| Mashpee Water District Mashpee |
36,922 | 0 | 21.8 mi | |
| Upper Cape Regional Water Cooperative Sandwich |
56,250 | 0 | 22.8 mi | |
| Otis Air National Guard Base Falmouth |
6,000 | 2 | 23.6 mi | |
| Stones Throw Condos Truro |
80 | 0 | 23.7 mi | |
| North Sagamore Water District Bourne |
4,668 | 0 | 25.4 mi | |
| Barnstable County Jail Bourne |
600 | 1 | 25.8 mi | |
| Provincetown Water Department Provincetown |
22,250 | 0 | 26.4 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, 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.