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Community Water System · PWS CT0780051

Knollwood Apartments

Storrs, Connecticut 06268 - drinking water served from groundwater sources to 312 people, tracked in EPA SDWIS and UCMR5.

312
People served
108
EPA violations
9
Health-based
Untested
UCMR5 result

The verdict

EPA records 108 drinking-water violations at Knollwood Apartments, 8% of them health-based - above the Connecticut per-system average.

108
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
312
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Knollwood Apartments

Knollwood Apartments is a private-owned community water system that delivers drinking water to 312 residents in Storrs, Connecticut (Tolland County) through 136 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 108 total violations for this system , of which 9 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 65 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 24 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. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%).

Knollwood Apartments's 108 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
312
Total Violations
108
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
136
County
Tolland
School/Daycare
No
MCL Violations
4
Monitoring Violations
65
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 24 2016
Lead and Copper Rule MR 20 2022
Consumer Confidence Rule Other 14 2022
Public Notice Other 6 2019
Nitrate MR 5 2017
Nitrite MR 5 2017
Coliform (TCR) MCL 4 2015
E. COLI MR 4 2017
Lead and Copper Rule TT 4 2020
Revised Total Coliform Rule MON 4 2022
Asbestos MR 3 2014
Lead and Copper Rule Other 2 1994
LEAD AND COPPER RULE REVISIONS RPT 1 2024
LEAD AND COPPER RULE REVISIONS TT 1 2024

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 Knollwood Apartments.

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 CT0780051 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
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / CT0780051 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / CT0780051 / 5200
2022 Lead and Copper Rule MR 20 SDWIS / CT0780051 / 5000
2022 Consumer Confidence Rule Other 14 SDWIS / CT0780051 / 7000
2022 Revised Total Coliform Rule MON 4 SDWIS / CT0780051 / 8000
2020 Lead and Copper Rule TT 4 SDWIS / CT0780051 / 5000
2019 Public Notice Other 6 SDWIS / CT0780051 / 7500
2017 Nitrate MR 5 SDWIS / CT0780051 / 1040
2017 Nitrite MR 5 SDWIS / CT0780051 / 1041
2017 E. COLI MR 4 SDWIS / CT0780051 / 3014
2016 Coliform (TCR) MR 24 SDWIS / CT0780051 / 3100
2015 Coliform (TCR) MCL 4 SDWIS / CT0780051 / 3100
2014 Asbestos MR 3 SDWIS / CT0780051 / 1094
1994 Lead and Copper Rule Other 2 SDWIS / CT0780051 / 5000

How Knollwood Apartments Compares

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

Metric Knollwood Apartments Connecticut avg Federal benchmark
Total violations 108 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 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 312 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 Knollwood Apartments water safe to drink? ▼
Knollwood Apartments (PWS ID: CT0780051) has 108 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 312 people using Groundwater sources.
How many people does Knollwood Apartments serve? ▼
Knollwood Apartments serves 312 people in Storrs, Connecticut. It is a Private-owned system using Groundwater water sources with 136 service connections.
What type of violations does Knollwood Apartments have? ▼
Knollwood Apartments has 108 total violations: 9 health-based violations (MCL exceedances or treatment failures), 65 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Knollwood Apartments water? ▼
No PFAS testing data is available for Knollwood Apartments under the EPA's UCMR5 monitoring program.
What water source does Knollwood Apartments use? ▼
Knollwood Apartments 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.