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WARWICK WATER WORKS

PWS ID: PA1150157 · KING OF PRUSSIA, Pennsylvania 19406

WARWICK WATER WORKS serves 98 people in KING OF PRUSSIA, Pennsylvania using Groundwater water sources. It has 287 recorded EPA violations, including 27 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: WARWICK WATER WORKS

WARWICK WATER WORKS is a private-owned community water system that delivers drinking water to 98 residents in KING OF PRUSSIA, Pennsylvania (Chester County) through 46 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 287 total violations for this system , of which 27 (9%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 206 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 19 violations (Other). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Pennsylvania, EPA tracks 7,701 public water systems serving 12,630,061 people, with 1,159,868 cumulative violations and 68,517 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 150.6 violations. WARWICK WATER WORKS's 287 violations sit above the Pennsylvania average. Statewide, 224 of 389 UCMR5-tested systems have reported PFAS detections (57.6%). 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
98
Total Violations
287
Health-Based Violations
27
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
46
County
Chester
School/Daycare
No
MCL Violations
5
Monitoring Violations
206
Treatment Tech Violations
22

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 19 2020
Public Notice Other 17 2019
Groundwater Rule MR 16 2025
Chlorine MR 13 2011
Lead and Copper Rule MR 12 2011
Revised Total Coliform Rule TT 12 2019
Groundwater Rule TT 8 2019
Coliform (TCR) MR 7 2011
1,1,1-Trichloroethane MR 6 2010
Carbon tetrachloride MR 6 2010
Trichloroethylene MR 6 2010
p-Dichlorobenzene MR 6 2010
1,2-Dichloroethane MR 6 2010
1,1-Dichloroethylene MR 6 2010
Revised Total Coliform Rule RPT 6 2019
Benzene MR 6 2010
Selenium MR 5 1988
Arsenic MR 5 1988
Cadmium MR 5 1988
Mercury MR 5 1988
Chromium MR 5 1988
Fluoride MR 5 1988
Barium MR 5 1988
1,2,4-Trichlorobenzene MR 4 2010
cis-1,2-Dichloroethylene MR 4 2010
o-Dichlorobenzene MR 4 2010
1,2-Dichloropropane MR 4 2010
CHLOROBENZENE MR 4 2010
Toluene MR 4 2010
Ethylbenzene MR 4 2010

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 WARWICK WATER WORKS.

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 PA1150157 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Pennsylvania Drinking Water Authority

Pennsylvania DEP — Bureau of Safe Drinking Water is the primacy agency that licenses and inspects WARWICK WATER WORKS under EPA-delegated authority.

Open PA regulator portal

Source: Pennsylvania DEP — Bureau of Safe Drinking Water

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 Groundwater Rule MR 16 SDWIS / PA1150157 / 0700
2024 Nickel MR 2 SDWIS / PA1150157 / 1036
2020 Consumer Confidence Rule Other 19 SDWIS / PA1150157 / 7000
2019 Public Notice Other 17 SDWIS / PA1150157 / 7500
2019 Revised Total Coliform Rule TT 12 SDWIS / PA1150157 / 8000
2019 Groundwater Rule TT 8 SDWIS / PA1150157 / 0700
2019 Revised Total Coliform Rule RPT 6 SDWIS / PA1150157 / 8000
2011 Chlorine MR 13 SDWIS / PA1150157 / 0999
2011 Lead and Copper Rule MR 12 SDWIS / PA1150157 / 5000
2011 Coliform (TCR) MR 7 SDWIS / PA1150157 / 3100
2010 1,1,1-Trichloroethane MR 6 SDWIS / PA1150157 / 2981
2010 Carbon tetrachloride MR 6 SDWIS / PA1150157 / 2982
2010 Trichloroethylene MR 6 SDWIS / PA1150157 / 2984
2010 p-Dichlorobenzene MR 6 SDWIS / PA1150157 / 2969
2010 1,2-Dichloroethane MR 6 SDWIS / PA1150157 / 2980

How WARWICK WATER WORKS Compares

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

Metric WARWICK WATER WORKS Pennsylvania avg Federal benchmark
Total violations 287 150.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 27 8.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 98 1,640 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,701 regulated public water systems in Pennsylvania.

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 WARWICK WATER WORKS water safe to drink? ▼
WARWICK WATER WORKS (PWS ID: PA1150157) has 287 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 98 people using Groundwater sources.
How many people does WARWICK WATER WORKS serve? ▼
WARWICK WATER WORKS serves 98 people in KING OF PRUSSIA, Pennsylvania. It is a Private-owned system using Groundwater water sources with 46 service connections.
What type of violations does WARWICK WATER WORKS have? ▼
WARWICK WATER WORKS has 287 total violations: 27 health-based violations (MCL exceedances or treatment failures), 206 monitoring/reporting violations, and 22 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WARWICK WATER WORKS water? ▼
No PFAS testing data is available for WARWICK WATER WORKS under the EPA's UCMR5 monitoring program.
What water source does WARWICK WATER WORKS use? ▼
WARWICK WATER WORKS 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.

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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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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial