PlainWater
Counties → Connecticut

New Haven County, Connecticut

Water Systems
212
Population Served
723,250
Total Violations
17,543
1,378 health-based
PFAS Detected
7
of 10 tested

Violation Analysis

94.3%
Systems with Violations
82.8
Avg Violations per System
7.9%
Health-Based Violations

Water Source Types

GW
39 systems (18%)
SW
11 systems (5%)

PFAS Contamination

10
Systems Tested
7
PFAS Detected
70.0%
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

New Haven Connecticut water systems by violation status, EPA SDWIS records.

No violations on record (3) One or more violations (47)

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
Regional Water Authority 418,900 62 Detected
Waterbury Water Department 107,271 35 Clean
Meriden Water Division 58,441 119 Detected
Wallingford Water Department 37,267 188 Detected
Ctwc - Shoreline Region-Guilford System 33,975 575 Detected
Ctwc - Naugatuck Region-Central System 22,735 15 Clean
Aquarion-Valley 13,080 26 Detected
Heritage Water Company 7,300 80 Detected
Wolcott Water Department 2,550 137 -
Ctwc - Legend Hill System 1,368 118 -
Aquarion-East Derby 1,101 32 -
Nonnewaug High School 887 52 -
Southbury Training School 816 370 -
Alcott School 638 108 -
Quonnipaug Hills - Main System 564 409 -
Bethany Community School 550 0 -
Calvary Fellowship Southbury 540 6 -
Melissa Jones School 484 79 -
Amity Regional Junior High School 475 164 -
Harmony Acres Mobile Home Park 465 232 -
Aquarion-Lakeside 455 165 -
Tyrrell Middle School 454 107 -
Aquarion-Oxford Towne Center 449 6 -
Frisbie Elementary School 446 17 -
Quassy Amusement Park 431 15 -
Middlebury Elementary School 412 90 -
Camp Laurelwood 400 67 -
125-131 Bradley Road - Woodbridge 385 1,147 -
The Country School (Main Building) 360 21 -
The Lake House 300 10 -
Arrowhead by the Lake Association, Inc. 288 117 -
Tranquility Vineyard and Winery 257 0 -
South Broad Street Service Area 250 9 -
Blue Trails Water Association 228 178 -
Church of Latter Day Saints, Woodbridge 220 22 -
Countryside Apartments 218 218 -
Aquarion-Clearview Hills 215 8 -
Laticrete International 200 347 -
171 Amity Road 180 246 -
YMCA - Camp Mountain Laurel 180 63 -
Church of Latter Day Saints, Madison 172 0 -
Kettletown S.p./Beach Well 167 34 -
Kettletown S.p./Campground Well 167 27 -
Christ the Savior Orthodox Church 150 116 -
Bethany Mobile Home Park 138 158 -
Idleview Mobile Home Park 138 4 -
Children's Village - Boundline 130 29 -
Great Expectations Day Care & Annex 125 44 -
New Life Church - South Ridge Complex 122 15 -
Church of Latter Day Saints, Southbury 121 7 -

Other Counties in Connecticut

Hartford County
219 systems · 836,032 served · 20,244 violations
Fairfield County
336 systems · 779,265 served · 42,084 violations
New London County
396 systems · 209,068 served · 34,737 violations
Litchfield County
345 systems · 117,396 served · 27,780 violations
Middlesex County
276 systems · 97,390 served · 25,593 violations
Windham County
255 systems · 63,884 served · 21,628 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in New Haven County? ▼
New Haven County has 17,543 total drinking water violations across 212 water systems, of which 1,378 are health-based violations. 94.3% of systems have at least one violation.
How many people get water from New Haven County systems? ▼
Water systems in New Haven County serve approximately 723,250 people through 212 public water systems.
Has PFAS been detected in New Haven County water? ▼
Of 10 water systems tested for PFAS in New Haven County, 7 had PFAS detected (70.0% detection rate).
What types of water sources supply New Haven County? ▼
Water systems in New Haven County use GW (39 systems), SW (11 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. 7.9% of New Haven 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.