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GRANBY COMMONS

PWS ID: CT0565033 · NORWALK, Connecticut 06851

GRANBY COMMONS serves 43 people in NORWALK, Connecticut using Groundwater water sources. It has 60 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: GRANBY COMMONS

GRANBY COMMONS is a private-owned transient non-community water system that delivers drinking water to 43 residents in NORWALK, Connecticut (Hartford County) through 9 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 60 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 60 monitoring and reporting violations are on file. The most recent violation on record dates to 2013.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 9 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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. GRANBY COMMONS's 60 violations sit below the Connecticut average. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%). 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
43
Total Violations
60
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
9
County
Hartford
School/Daycare
No
MCL Violations
0
Monitoring Violations
60
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 9 2001
Lead and Copper Rule MR 9 2002
DICHLOROMETHANE MR 2 2009
o-Dichlorobenzene MR 2 2009
p-Dichlorobenzene MR 2 2009
Vinyl chloride MR 2 2009
1,2-Dichloroethane MR 2 2009
Carbon tetrachloride MR 2 2009
1,1,2-Trichloroethane MR 2 2009
Trichloroethylene MR 2 2009
CHLOROBENZENE MR 2 2009
Styrene MR 2 2009
Ethylbenzene MR 2 2009
Nitrate MR 2 2013
Benzene MR 2 2009
1,2-Dichloropropane MR 2 2009
1,1-Dichloroethylene MR 2 2009
trans-1,2-Dichloroethylene MR 2 2009
1,1,1-Trichloroethane MR 2 2009
Tetrachloroethylene MR 2 2009
Toluene MR 2 2009
cis-1,2-Dichloroethylene MR 2 2009
1,2,4-Trichlorobenzene MR 2 2009

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 GRANBY COMMONS.

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 CT0565033 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
2013 Nitrate MR 2 SDWIS / CT0565033 / 1040
2009 DICHLOROMETHANE MR 2 SDWIS / CT0565033 / 2964
2009 o-Dichlorobenzene MR 2 SDWIS / CT0565033 / 2968
2009 p-Dichlorobenzene MR 2 SDWIS / CT0565033 / 2969
2009 Vinyl chloride MR 2 SDWIS / CT0565033 / 2976
2009 1,2-Dichloroethane MR 2 SDWIS / CT0565033 / 2980
2009 Carbon tetrachloride MR 2 SDWIS / CT0565033 / 2982
2009 1,1,2-Trichloroethane MR 2 SDWIS / CT0565033 / 2985
2009 Trichloroethylene MR 2 SDWIS / CT0565033 / 2984
2009 CHLOROBENZENE MR 2 SDWIS / CT0565033 / 2989
2009 Styrene MR 2 SDWIS / CT0565033 / 2996
2009 Ethylbenzene MR 2 SDWIS / CT0565033 / 2992
2009 Benzene MR 2 SDWIS / CT0565033 / 2990
2009 1,2-Dichloropropane MR 2 SDWIS / CT0565033 / 2983
2009 1,1-Dichloroethylene MR 2 SDWIS / CT0565033 / 2977

How GRANBY COMMONS Compares

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

Metric GRANBY COMMONS Connecticut avg Federal benchmark
Total violations 60 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 43 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is GRANBY COMMONS water safe to drink? ▼
GRANBY COMMONS (PWS ID: CT0565033) has 60 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 43 people using Groundwater sources.
How many people does GRANBY COMMONS serve? ▼
GRANBY COMMONS serves 43 people in NORWALK, Connecticut. It is a Private-owned system using Groundwater water sources with 9 service connections.
What type of violations does GRANBY COMMONS have? ▼
GRANBY COMMONS has 60 total violations: 0 health-based violations (MCL exceedances or treatment failures), 60 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in GRANBY COMMONS water? ▼
No PFAS testing data is available for GRANBY COMMONS under the EPA's UCMR5 monitoring program.
What water source does GRANBY COMMONS use? ▼
GRANBY COMMONS uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

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