Water quality for ZIP code 02451
ZIP 02451 covers Waltham 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 |
|---|---|---|---|---|
| Lincoln Water Dept Lincoln |
5,593 | 1 | 3.4 mi | |
| Weston Water Dept. Weston |
11,391 | 0 | 3.5 mi | |
| Lexington Water Dept. (mwra) Lexington |
34,074 | 1 | 3.5 mi | |
| Belmont Water Dept. (mwra) Belmont |
27,442 | 1 | 4.0 mi | |
| Hanscom Family Housing (landings) Lincoln |
3,067 | 1 | 4.0 mi | |
| Watertown Department of Public Works Watertown |
35,985 | 0 | 4.4 mi | |
| Hanscom Afb Bedford |
11,789 | 0 | 4.4 mi | |
| Arlington Water Dept. (mwra) Arlington |
46,308 | 0 | 4.9 mi | |
| Newton Water Dept. (mwra) Newton |
88,931 | 1 | 5.2 mi | |
| Wayland Water Department Wayland |
14,096 | 1 | 5.8 mi | |
| Winchester Water Dept Winchester |
22,970 | 2 | 6.7 mi | |
| Bedford Water Dept. Bedford |
14,955 | 0 | 7.1 mi | |
| Bedford VA Hospital (rogers Mem. Hosp.) Bedford |
177 | 0 | 7.1 mi | |
| Cambridge Water Department Cambridge |
118,214 | 0 | 7.2 mi | |
| Concord Water Dept Concord |
18,788 | 1 | 7.2 mi | |
| Medford Water Dept. (mwra) Medford |
61,700 | 1 | 7.8 mi | |
| Burlington Water Dept Burlington |
25,864 | 1 | 7.8 mi | |
| Somerville Water Dept. (mwra) Somerville |
81,045 | 1 | 7.9 mi | |
| Woburn Water Dept. Woburn |
40,876 | 0 | 8.0 mi | |
| Sudbury Water District Sudbury |
18,416 | 3 | 8.7 mi | |
| Natick Water and Sewer Division Natick |
37,006 | 1 | 9.1 mi | |
| Stoneham Water Dept (mwra Supply) Stoneham |
23,244 | 0 | 9.7 mi | |
| Benfield Farms Carlisle |
50 | 0 | 10.1 mi | |
| Maynard Dpw, Water Division Maynard |
10,746 | 3 | 10.3 mi | |
| Pine Hill Condominium Acton |
95 | 0 | 10.3 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.