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Community Water System · PWS CT0950011

New London Dept. of Public Utilities

Waterford, Connecticut 05385 - drinking water served from surface water sources to 27,620 people, tracked in EPA SDWIS and UCMR5.

27,620
People served
203
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 203 drinking-water violations at New London Dept. of Public Utilities - above the Connecticut per-system average.

203
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
27,620
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: New London Dept. of Public Utilities

New London Dept. of Public Utilities is a local-owned community water system that delivers drinking water to 27,620 residents in Waterford, Connecticut (New London County) through 7,027 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 203 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 165 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 24 violations (Other). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Connecticut, EPA tracks 2,332 public water systems serving 2,886,005 people, with 206,662 cumulative violations and 21,779 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 88.6 violations. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%).

New London Dept. of Public Utilities's 203 violations sit above the Connecticut average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
27,620
Total Violations
203
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
7,027
County
New London
School/Daycare
No
MCL Violations
0
Monitoring Violations
165
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 24 2025
Coliform (TCR) MR 21 2015
Total Haloacetic Acids (HAA5) MR 18 2005
TTHM MR 16 2005
Surface Water Treatment Rule MR 12 2007
E. COLI MR 8 2017
Turbidity MR 8 2017
Chlorine MR 7 2007
Filter Backwash Rule MR 4 2003
Barium MR 2 2004
Arsenic MR 2 2004
Cadmium MR 2 2004
Chromium MR 2 2004
CYANIDE MR 2 2004
Fluoride MR 2 2004
Nickel MR 2 2004
Selenium MR 2 2004
Nitrate MR 2 2004
1,2,4-Trichlorobenzene MR 2 2004
cis-1,2-Dichloroethylene MR 2 2004
p-Dichlorobenzene MR 2 2004
Vinyl chloride MR 2 2004
1,1-Dichloroethylene MR 2 2004
trans-1,2-Dichloroethylene MR 2 2004
Tetrachloroethylene MR 2 2004
CHLOROBENZENE MR 2 2004
Benzene MR 2 2004
Cryptosporidium MR 2 2017
1,1,2-Trichloroethane MR 2 2004
1,2-Dichloroethane MR 2 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 9/11/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/11/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/11/2023 <6.00 ppt 6.00 ppt Not Detected
PFHpS 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/13/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 6/13/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 6/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 6/13/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 6/13/2023 <8.00 ppt 8.00 ppt Not Detected
PFHxA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 6/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/13/2023 <2.00 ppt 2.00 ppt Not Detected
PFBS 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/13/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeS 6/13/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 6/13/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/13/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 6/13/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/13/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 6/13/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 3/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 3/14/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 3/14/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 3/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 3/14/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 3/14/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 3/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFOS 3/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 3/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 3/14/2023 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for New London Dept. of Public Utilities.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CT0950011 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Connecticut Drinking Water Authority

Connecticut's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find CT regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Consumer Confidence Rule Other 24 SDWIS / CT0950011 / 7000
2020 Lead and Copper Rule MR 1 SDWIS / CT0950011 / 5000
2017 E. COLI MR 8 SDWIS / CT0950011 / 3014
2017 Turbidity MR 8 SDWIS / CT0950011 / 0100
2017 Cryptosporidium MR 2 SDWIS / CT0950011 / 3015
2015 Coliform (TCR) MR 21 SDWIS / CT0950011 / 3100
2007 Surface Water Treatment Rule MR 12 SDWIS / CT0950011 / 0200
2007 Chlorine MR 7 SDWIS / CT0950011 / 0999
2005 Total Haloacetic Acids (HAA5) MR 18 SDWIS / CT0950011 / 2456
2005 TTHM MR 16 SDWIS / CT0950011 / 2950
2004 Barium MR 2 SDWIS / CT0950011 / 1010
2004 Arsenic MR 2 SDWIS / CT0950011 / 1005
2004 Cadmium MR 2 SDWIS / CT0950011 / 1015
2004 Chromium MR 2 SDWIS / CT0950011 / 1020
2004 CYANIDE MR 2 SDWIS / CT0950011 / 1024

How New London Dept. of Public Utilities Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric New London Dept. of Public Utilities Connecticut avg Federal benchmark
Total violations 203 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 9.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 63.5% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 27,620 1,238 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,332 regulated public water systems in Connecticut.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is New London Dept. of Public Utilities water safe to drink? ▼
New London Dept. of Public Utilities (PWS ID: CT0950011) has 203 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 27,620 people using Surface Water sources.
How many people does New London Dept. of Public Utilities serve? ▼
New London Dept. of Public Utilities serves 27,620 people in Waterford, Connecticut. It is a Local-owned system using Surface Water water sources with 7,027 service connections.
What type of violations does New London Dept. of Public Utilities have? ▼
New London Dept. of Public Utilities has 203 total violations: 0 health-based violations (MCL exceedances or treatment failures), 165 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in New London Dept. of Public Utilities water? ▼
No. New London Dept. of Public Utilities was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does New London Dept. of Public Utilities use? ▼
New London Dept. of Public Utilities uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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 system's figures are rendered directly from 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.