PlainWater
Counties → New Hampshire

Coos County, New Hampshire

Water Systems
113
Population Served
41,156
Total Violations
7,377
939 health-based
PFAS Detected
0
of 1 tested

Violation Analysis

91.2%
Systems with Violations
65.3
Avg Violations per System
12.7%
Health-Based Violations

Water Source Types

GW
47 systems (42%)
SW
3 systems (3%)

PFAS Contamination

1
Systems Tested
0
PFAS Detected
0.0%
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

Coos 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
Berlin Water Works 9,575 11 Clean
Groveton Water Sys 2,650 79 -
Gorham Water and Sewer Dept 2,630 85 -
Lancaster Water Dept 2,450 217 -
Whitefield Water 1,640 50 -
Colebrook Water Works 1,300 173 -
Rogers Campground 1,250 51 -
Mt Washington State Park 1,200 16 -
Rosebrook Water 1,050 172 -
Santas Village 999 6 -
Mt Washington Cog Rw/Peppersas 999 16 -
Wildcat Mountain Ski Area 900 8 -
Carroll Water Works 875 14 -
Santas Village Snack Bar 700 8 -
Dolly Copp Campground 600 41 -
Auto Road Lodge 500 9 -
White Birches Campground South 480 21 -
White Mtn Regional Hs 453 59 -
Beech Hill Campground 448 47 -
W Stewartstown Water Pct 428 81 -
Town and Country Inn/Resort 383 4 -
Buck Rub Pizza Pub and Lodge 359 48 -
Israel River Campground 300 13 -
Santas Village/Elfs Lodge 300 0 -
Mountain Lake Campground 300 25 -
North Stratford Water Dept 300 197 -
Lantern Resort 260 54 -
Jericho Mountain State Park 250 8 -
Jefferson Campground 250 60 -
Timberland Cmpgrnd and RV Prk 250 8 -
Pittsburg Water Dept 233 34 -
Colebrook Rest Area 200 14 -
Log Haven Campground 200 76 -
Hermit Lake Shelter Site 200 17 -
Mountainview Grand Resort 200 0 -
Cabot Inn and Suites 190 23 -
Tall Timber Lodge and Cabins 190 63 -
Errol Water Works/West 183 973 -
Water Wheel Breakfast/Gift Hse 180 45 -
Glen House Hotel 165 3 -
Sugarloaf I/II Cpg 158 30 -
Milan Village Sch 151 83 -
Burns Lake Campground 150 18 -
Sugarloaf II Cpg/Site 24 141 13 -
Amc Highland Center 138 16 -
Pittsburgs Hidden Acres 130 10 -
Old Corner Store 125 14 -
Spruce Cone Park 125 78 -
Lodge at Bretton Woods 121 8 -
Umbagog Lake Stp Cmpgrnd 120 55 -

Other Counties in New Hampshire

Hillsborough County
280 systems · 336,342 served · 17,880 violations
Rockingham County
559 systems · 273,232 served · 32,389 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

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Coos County? ▼
Coos County has 7,377 total drinking water violations across 113 water systems, of which 939 are health-based violations. 91.2% of systems have at least one violation.
How many people get water from Coos County systems? ▼
Water systems in Coos County serve approximately 41,156 people through 113 public water systems.
Has PFAS been detected in Coos County water? ▼
Of 1 water systems tested for PFAS in Coos County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Coos County? ▼
Water systems in Coos County use GW (47 systems), SW (3 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. 12.7% of Coos 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.