Water quality for ZIP code 06401
ZIP 06401 covers Ansonia and Derby in New Haven County, Connecticut, one of 41 ZIP codes in the county. 212 active public water systems serve the county; 114 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 New Haven County
31 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Aquarion-East Derby Derby, Orange |
1,101 | 1 | 2.0 mi | |
| Aquarion-Valley Ansonia, Beacon Falls, Bethany and 3 more |
13,080 | 0 | 4.1 mi | |
| Aquarion-Hawkstone Oxford, Seymour |
120 | 0 | 4.4 mi | |
| Aquarion-Oxford Towne Center Oxford |
449 | 0 | 8.0 mi | |
| Bethany Mobile Home Park Bethany |
138 | 2 | 9.0 mi | |
| Aquarion-Lakeside Southbury |
455 | 0 | 10.3 mi | |
| Heritage Water Company Middlebury, Oxford, Southbury |
7,300 | 0 | 10.8 mi | |
| Harmony Acres Mobile Home Park Prospect |
465 | 1 | 10.9 mi | |
| Ctwc Naugatuck Region-Central System Beacon Falls, Naugatuck, Prospect and 1 more |
22,735 | 0 | 10.9 mi | |
| Idleview Mobile Home Park Naugatuck |
138 | 0 | 11.3 mi | |
| Oakdale Manor Water Association Southbury |
40 | 5 | 11.7 mi | |
| Middlebury Commons Middlebury |
76 | 1 | 13.3 mi | |
| Crestview Condominium Association Cheshire |
84 | 6 | 13.3 mi | |
| Aquarion-West Shore Middlebury |
100 | 0 | 13.6 mi | |
| Southbury Training School Southbury |
816 | 4 | 14.5 mi | |
| Waterbury Water Department Middlebury, Prospect, Waterbury and 2 more |
107,271 | 2 | 14.9 mi | |
| Wallingford Water Department North Haven, Wallingford |
37,267 | 2 | 15.4 mi | |
| Wolcott Water Department Waterbury, Wolcott |
2,550 | 0 | 16.6 mi | |
| Northford Glen Condominium Association North Branford |
84 | 5 | 16.9 mi | |
| Aquarion-Clearview Hills Wolcott |
215 | 0 | 17.2 mi | |
| Countryside Apartments Wolcott |
218 | 0 | 17.3 mi | |
| Aquarion-Woodrich Village Wolcott |
72 | 0 | 17.9 mi | |
| Arrowhead by the Lake Association, Inc. Wolcott |
288 | 0 | 17.9 mi | |
| Blue Trails Water Association Durham, North Branford |
224 | 4 | 18.2 mi | |
| Meriden Water Division Berlin, Cheshire, Meriden and 2 more |
58,441 | 4 | 19.2 mi |
Non-community systems in New Haven County (180: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to New Haven 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 Connecticut 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.