PlainWater
Counties → New Hampshire

Rockingham County, New Hampshire

Water Systems
559
Population Served
273,232
Total Violations
32,389
7,307 health-based
PFAS Detected
11
of 12 tested

Violation Analysis

88.0%
Systems with Violations
57.9
Avg Violations per System
22.6%
Health-Based Violations

Water Source Types

GW
41 systems (7%)
SW
9 systems (2%)

PFAS Contamination

12
Systems Tested
11
PFAS Detected
91.7%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Rockingham New Hampshire water systems by violation status, EPA SDWIS records.

No violations on record (2) One or more violations (48)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Aquarion Water/NH 34,000 19 Detected
Portsmouth Water Works 33,000 43 Detected
Salem Water Dept 21,000 33 Detected
Derry Water Dept 17,210 12 Detected
Seabrook Water Dept 14,000 1,029 Detected
Exeter Water Dept 12,236 268 Detected
Pease Trade Port 9,900 7 Detected
Hampstead Area Water 6,953 174 Detected
Londonderry 5,380 8 Detected
Newmarket Water Works 5,030 251 Clean
Rye Water Dist 4,300 20 Detected
Raymond Water Dept 3,300 28 Detected
Exeter High Sch 1,605 8 -
Epping Water and Sewer Dept 1,600 32 -
Drew Woods 1,408 8 -
Rockingham County Complex 1,387 15 -
Golden Brook Sch 1,314 20 -
Timberlane Regional Hs 1,137 50 -
Windham High Sch 1,110 18 -
Candia First Stoppe 999 12 -
Wakeda Campground 999 0 -
Pawtuckaway St Pk/Admn Complex 999 30 -
Pawtuckaway St Pk/Horse Island 999 37 -
Pawtuckaway St Pk/Day Use Area 999 32 -
Exeter River Mobile Home Park 980 76 -
Great Bay Camping/Store/Deli 925 20 -
New Castle Water Works 910 115 -
Dunkin Donuts 900 14 -
Plaistow Petro King 900 21 -
Timberlane Middle Sch 897 18 -
Sanborn Regional Middle/High 875 8 -
Brook Park Ests 875 7 -
Century Village Condos 875 101 -
Auburn Dunkin Donuts 800 8 -
Nouria 1167 800 18 -
Tuxbury Pond RV Resort 800 26 -
Dunkin Donuts /Pc 346676 800 8 -
Coe Brown Academy 765 190 -
Coe Brown Smith Hall 765 8 -
YMCA Camp Lincoln/Pavilion 750 95 -
YMCA Camp Lincoln/Lakeside 750 43 -
Coe Brown Athletic Field 750 34 -
Auburn Village Sch 732 99 -
Dunkin Donuts 700 4 -
Vlg of Northwood Rdg Wtr Dist 688 88 -
Deerfield Community Sch 650 92 -
Stratham Memorial Sch 625 10 -
Green Hills Ests 620 7 -
Mobil on the Run 615 23 -
Chester Academy 607 0 -

Other Counties in New Hampshire

Hillsborough County
280 systems · 336,342 served · 17,880 violations
Merrimack County
247 systems · 124,101 served · 14,635 violations
Strafford County
132 systems · 107,387 served · 8,921 violations
Grafton County
269 systems · 101,638 served · 20,540 violations
Carroll County
363 systems · 80,560 served · 21,120 violations
Belknap County
255 systems · 74,926 served · 16,111 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Rockingham County? ▼
Rockingham County has 32,389 total drinking water violations across 559 water systems, of which 7,307 are health-based violations. 88.0% of systems have at least one violation.
How many people get water from Rockingham County systems? ▼
Water systems in Rockingham County serve approximately 273,232 people through 559 public water systems.
Has PFAS been detected in Rockingham County water? ▼
Of 12 water systems tested for PFAS in Rockingham County, 11 had PFAS detected (91.7% detection rate).
What types of water sources supply Rockingham County? ▼
Water systems in Rockingham County use GW (41 systems), SW (9 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 22.6% of Rockingham County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.