Water quality for ZIP code 03740
ZIP 03740 covers Mountain Lakes in Grafton County, New Hampshire, one of 36 ZIP codes in the county. 269 active public water systems serve the county; 117 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Grafton County
73 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Woodsville Water and Light Haverhill |
1,950 | 1 | 4.0 mi | |
| Lisbon Water Dept Lisbon |
1,010 | 3 | 4.1 mi | |
| Mountain Lakes Water District Haverhill |
787 | 0 | 4.7 mi | |
| Monroe Water Dept Monroe |
300 | 0 | 6.1 mi | |
| French Pond Estates Haverhill |
27 | 1 | 7.1 mi | |
| NO Haverhill Water and Light Haverhill |
750 | 2 | 7.2 mi | |
| Precinct of Haverhill Corner Haverhill |
540 | 0 | 11.1 mi | |
| Franconia Village Water Franconia |
535 | 1 | 12.1 mi | |
| Littleton Water and Light Littleton |
6,500 | 1 | 13.1 mi | |
| Mittersill Water Dept Franconia |
475 | 2 | 13.2 mi | |
| Glencliff Home for the Elderly Benton |
230 | 1 | 13.6 mi | |
| Glencliff Improvement Warren |
30 | 3 | 14.3 mi | |
| Bethlehem Village Dist Bethlehem |
1,750 | 2 | 15.7 mi | |
| Lincoln Water Works Lincoln |
3,300 | 0 | 18.3 mi | |
| Woodstock Water Dept Woodstock |
2,950 | 0 | 18.6 mi | |
| South Main Street Water Dist Warren |
200 | 1 | 18.7 mi | |
| Orford Village Dist Orford |
128 | 0 | 20.9 mi | |
| Jack O Lantern Condos Woodstock |
98 | 0 | 21.9 mi | |
| Star Ridge Thornton |
96 | 0 | 22.7 mi | |
| Birch Bend Thornton |
28 | 2 | 23.9 mi | |
| Hawthorne Village Rumney |
55 | 2 | 24.2 mi | |
| Mill Brook Village Thornton |
113 | 0 | 24.6 mi | |
| Deer Run Campton |
150 | 1 | 25.1 mi | |
| Northpointe Water Thornton |
48 | 1 | 25.4 mi | |
| 175 Estates Thornton |
100 | 1 | 25.4 mi |
Non-community systems in Grafton County (195: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Grafton 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 New Hampshire 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.