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Community Water System · PWS CT1669011

Arrowhead by the Lake Association, Inc.

Seymour, Connecticut 06483 - drinking water served from groundwater sources to 288 people, tracked in EPA SDWIS and UCMR5.

288
People served
117
EPA violations
33
Health-based
Untested
UCMR5 result

The verdict

EPA records 117 drinking-water violations at Arrowhead by the Lake Association, Inc., 28% of them health-based - above the Connecticut per-system average.

117
Total EPA violations on record
28%
Health-based (MCL / treatment failure)
288
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Arrowhead by the Lake Association, Inc.

Arrowhead by the Lake Association, Inc. is a private-owned community water system that delivers drinking water to 288 residents in Seymour, Connecticut (New Haven County) through 72 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 117 total violations for this system , of which 33 (28%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 48 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Antimony, Total, recorded in 19 violations (MCL, health-based). 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. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%).

Arrowhead by the Lake Association, Inc.'s 117 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
288
Total Violations
117
Health-Based Violations
33
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
72
County
New Haven
School/Daycare
No
MCL Violations
25
Monitoring Violations
48
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Antimony, Total MCL 19 2016
Antimony, Total MR 17 2016
Consumer Confidence Rule Other 16 2011
Lead and Copper Rule MR 14 2015
Coliform (TCR) MR 13 2013
Revised Total Coliform Rule RPT 11 2016
Lead and Copper Rule TT 8 2015
Coliform (TCR) MCL 6 2015
Public Notice Other 4 2017
E. COLI MR 4 2015

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 Arrowhead by the Lake Association, Inc..

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 CT1669011 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
2017 Public Notice Other 4 SDWIS / CT1669011 / 7500
2016 Antimony, Total MCL 19 SDWIS / CT1669011 / 1074
2016 Antimony, Total MR 17 SDWIS / CT1669011 / 1074
2016 Revised Total Coliform Rule RPT 11 SDWIS / CT1669011 / 8000
2015 Lead and Copper Rule MR 14 SDWIS / CT1669011 / 5000
2015 Lead and Copper Rule TT 8 SDWIS / CT1669011 / 5000
2015 Coliform (TCR) MCL 6 SDWIS / CT1669011 / 3100
2015 E. COLI MR 4 SDWIS / CT1669011 / 3014
2013 Coliform (TCR) MR 13 SDWIS / CT1669011 / 3100
2011 Consumer Confidence Rule Other 16 SDWIS / CT1669011 / 7000

How Arrowhead by the Lake Association, Inc. Compares

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

Metric Arrowhead by the Lake Association, Inc. Connecticut avg Federal benchmark
Total violations 117 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 33 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 288 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 Arrowhead by the Lake Association, Inc. water safe to drink? ▼
Arrowhead by the Lake Association, Inc. (PWS ID: CT1669011) has 117 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 288 people using Groundwater sources.
How many people does Arrowhead by the Lake Association, Inc. serve? ▼
Arrowhead by the Lake Association, Inc. serves 288 people in Seymour, Connecticut. It is a Private-owned system using Groundwater water sources with 72 service connections.
What type of violations does Arrowhead by the Lake Association, Inc. have? ▼
Arrowhead by the Lake Association, Inc. has 117 total violations: 33 health-based violations (MCL exceedances or treatment failures), 48 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Arrowhead by the Lake Association, Inc. water? ▼
No PFAS testing data is available for Arrowhead by the Lake Association, Inc. under the EPA's UCMR5 monitoring program.
What water source does Arrowhead by the Lake Association, Inc. use? ▼
Arrowhead by the Lake Association, Inc. uses Groundwater 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. 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.