Water quality for ZIP code 02421
ZIP 02421 covers Lexington in Middlesex County, Massachusetts, one of 81 ZIP codes in the county. 206 active public water systems serve the county; 85 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 Middlesex County
97 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Hanscom Family Housing (landings) Lincoln |
3,067 | 1 | 2.3 mi | |
| Hanscom Afb Bedford |
11,789 | 0 | 2.4 mi | |
| Waltham Water Department Waltham |
65,218 | 1 | 3.5 mi | |
| Lincoln Water Dept Lincoln |
5,593 | 1 | 3.7 mi | |
| Arlington Water Dept. (mwra) Arlington |
46,308 | 0 | 4.1 mi | |
| Belmont Water Dept. (mwra) Belmont |
27,442 | 1 | 4.4 mi | |
| Bedford Water Dept. Bedford |
14,955 | 0 | 4.5 mi | |
| Bedford VA Hospital (rogers Mem. Hosp.) Bedford |
177 | 0 | 4.7 mi | |
| Winchester Water Dept Winchester |
22,970 | 2 | 4.8 mi | |
| Burlington Water Dept Burlington |
25,864 | 1 | 4.9 mi | |
| Woburn Water Dept. Woburn |
40,876 | 0 | 5.5 mi | |
| Watertown Department of Public Works Watertown |
35,985 | 0 | 5.7 mi | |
| Weston Water Dept. Weston |
11,391 | 0 | 6.4 mi | |
| Concord Water Dept Concord |
18,788 | 1 | 6.8 mi | |
| Medford Water Dept. (mwra) Medford |
61,700 | 1 | 6.8 mi | |
| Cambridge Water Department Cambridge |
118,214 | 0 | 7.5 mi | |
| Newton Water Dept. (mwra) Newton |
88,931 | 1 | 7.6 mi | |
| Stoneham Water Dept (mwra Supply) Stoneham |
23,244 | 0 | 7.7 mi | |
| Somerville Water Dept. (mwra) Somerville |
81,045 | 1 | 7.8 mi | |
| Wayland Water Department Wayland |
14,096 | 1 | 8.1 mi | |
| Billerica Water Works Billerica |
42,119 | 0 | 8.4 mi | |
| Benfield Farms Carlisle |
50 | 0 | 8.7 mi | |
| Wilmington Water Dept Wilmington |
21,654 | 1 | 9.1 mi | |
| Woodward Village Carlisle |
54 | 0 | 9.2 mi | |
| Garrison Place Condominium Trust Carlisle |
32 | 0 | 9.2 mi |
Non-community systems in Middlesex County (108: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Middlesex 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.