County · New Hampshire
Rockingham County, New Hampshire: drinking water records
This overview covers 36 ZIP codes and 187 community water systems in Rockingham County. It also stands in for 13 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Exeter Water Dept NH0801010 | 12,236 | 180 | 7 | 13 | 0 ppb |
| Hampstead Area Water NH1031010 | 7,153 | 720 | 5 | 3 | 2 ppb |
| Rye Water Dist NH2041010 | 4,300 | 60 | 4 | 1 | 0 ppb |
| Raymond Water Dept NH1971010 | 3,300 | 180 | 1 | 1 | 1 ppb |
| Portsmouth Water Works NH1951010 | 33,000 | 540 | 8 | 0 | 0 ppb |
| Salem Water Dept NH2051010 | 21,000 | 240 | 3 | 0 | 2 ppb |
| Derry Water Dept NH0611010 | 17,370 | 120 | 1 | 0 | 0 ppb |
| Seabrook Water Dept NH2111010 | 14,000 | 240 | 3 | 0 | 3 ppb |
| Pease Trade Port NH1951020 | 9,900 | 60 | 1 | 0 | 0 ppb |
| Londonderry NH1391010 | 6,255 | 120 | 1 | 0 | 0 ppb |
| Newmarket Water Works NH1731010 | 5,030 | 120 | 0 | 0 | 2 ppb |
| New Castle Water Works NH1661010 | 910 | 0 | 0 | 8 | 17 ppb |
| Cotton Farms MHP NH0583030 | 390 | 0 | 0 | 1 | 44 ppb |
| Oakridge Condos NH1392010 | 250 | 0 | 0 | 2 | 38 ppb |
| Riverview Manor Condos NH1972020 | 110 | 0 | 0 | 1 | 510 ppb |
| Windham Terrace NH2544020 | 110 | 0 | 0 | 1 | 37 ppb |
| Rolling Meadows Condos I NH1392200 | 88 | 0 | 0 | 1 | 21 ppb |
| Anns Landing NH1272020 | 63 | 0 | 0 | 1 | 26 ppb |
| Shadow Lake Mobile Home Park NH2053030 | 58 | 0 | 0 | 1 | 16 ppb |
| Exeter Highlands NH0802020 | 50 | 0 | 0 | 1 | 52 ppb |
| Pawtuckaway Farms NH1972050 | 38 | 0 | 0 | 1 | 25 ppb |
| Lamington Hill NH2232170 | 35 | 0 | 0 | 9 | 18 ppb |
| Camelot III NH2542190 | 33 | 0 | 0 | 4 | 66 ppb |
| Dearborn Ridge NH0112090 | 27 | 0 | 0 | 1 | 16 ppb |
| Pickpocket Woods NH0802010 | 26 | 0 | 0 | 1 | 19 ppb |
ZIP reports in Rockingham County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 03036, 03037, 03042, 03044, 03087, 03261, 03291, 03819, 03844, 03848, 03858, 03873, 03885.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.