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Community Water System · PWS PA5040008

Ambridge Water Auth

Ambridge, Pennsylvania 15003 - drinking water served from surface water sources to 19,500 people, tracked in EPA SDWIS and UCMR5.

19,500
People served
269
EPA violations
41
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 269 drinking-water violations at Ambridge Water Auth, 15% of them health-based - above the Pennsylvania per-system average.

269
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
19,500
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ambridge Water Auth

Ambridge Water Auth is a local-owned community water system that delivers drinking water to 19,500 residents in Ambridge, Pennsylvania (Beaver County) through 7,578 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 269 total violations for this system , of which 41 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 208 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 Interim Enhanced Surface Water Treatment Rule, recorded in 61 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. Statewide, 224 of 389 UCMR5-tested systems have reported PFAS detections (57.6%).

Ambridge Water Auth's 269 violations sit above the Pennsylvania 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
19,500
Total Violations
269
Health-Based Violations
41
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
7,578
County
Beaver
School/Daycare
No
MCL Violations
0
Monitoring Violations
208
Treatment Tech Violations
41

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Interim Enhanced Surface Water Treatment Rule MR 61 2004
Surface Water Treatment Rule MR 47 2025
CARBON, TOTAL TT 28 2016
CARBON, TOTAL MR 18 2025
Chlorine MR 17 2025
Total Haloacetic Acids (HAA5) MR 15 2024
TTHM MR 15 2024
Public Notice Other 13 2016
Surface Water Treatment Rule TT 8 1991
Coliform (TCR) MR 7 2002
Consumer Confidence Rule Other 4 2017
Di(2-ethylhexyl) phthalate MR 4 2018
Fluoride MR 4 2023
Groundwater Rule TT 3 2023
Interim Enhanced Surface Water Treatment Rule TT 2 2006
Di(2-ethylhexyl) adipate MR 2 2011
Endrin MR 2 1982
BHC-GAMMA MR 2 1982
Methoxychlor MR 2 1982
Toxaphene MR 2 1982
2,4,5-TP MR 2 1982
2,4-D MR 2 1982
Benzo(a)pyrene MR 2 2011
Gross Alpha, Excl. Radon and U MR 2 1988
Endothall MR 2 2011

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
8:2 FTS 9/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/6/2023 <20.00 ppt 20.00 ppt Not Detected
PFOS 9/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/6/2023 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 9/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 9/6/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/6/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/6/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/6/2023 <6.00 ppt 6.00 ppt Not Detected
PFDoA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 9/6/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/6/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 9/6/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 9/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFMBA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/21/2023 <20.00 ppt 20.00 ppt Not Detected
8:2 FTS 6/21/2023 <5.00 ppt 5.00 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 Ambridge Water Auth.

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 PA5040008 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 Ambridge Water Auth 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 Surface Water Treatment Rule MR 47 SDWIS / PA5040008 / 0200
2025 CARBON, TOTAL MR 18 SDWIS / PA5040008 / 2920
2025 Chlorine MR 17 SDWIS / PA5040008 / 0999
2024 Total Haloacetic Acids (HAA5) MR 15 SDWIS / PA5040008 / 2456
2024 TTHM MR 15 SDWIS / PA5040008 / 2950
2023 Fluoride MR 4 SDWIS / PA5040008 / 1025
2023 Groundwater Rule TT 3 SDWIS / PA5040008 / 0700
2018 Di(2-ethylhexyl) phthalate MR 4 SDWIS / PA5040008 / 2039
2017 Consumer Confidence Rule Other 4 SDWIS / PA5040008 / 7000
2016 CARBON, TOTAL TT 28 SDWIS / PA5040008 / 2920
2016 Public Notice Other 13 SDWIS / PA5040008 / 7500
2011 Di(2-ethylhexyl) adipate MR 2 SDWIS / PA5040008 / 2035
2011 Benzo(a)pyrene MR 2 SDWIS / PA5040008 / 2306
2011 Endothall MR 2 SDWIS / PA5040008 / 2033
2006 Interim Enhanced Surface Water Treatment Rule TT 2 SDWIS / PA5040008 / 0300

How Ambridge Water Auth Compares

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

Metric Ambridge Water Auth Pennsylvania avg Federal benchmark
Total violations 269 150.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 41 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 19,500 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 (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 Ambridge Water Auth water safe to drink? ▼
Ambridge Water Auth (PWS ID: PA5040008) has 269 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 19,500 people using Surface Water sources.
How many people does Ambridge Water Auth serve? ▼
Ambridge Water Auth serves 19,500 people in Ambridge, Pennsylvania. It is a Local-owned system using Surface Water water sources with 7,578 service connections.
What type of violations does Ambridge Water Auth have? ▼
Ambridge Water Auth has 269 total violations: 41 health-based violations (MCL exceedances or treatment failures), 208 monitoring/reporting violations, and 41 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ambridge Water Auth water? ▼
No. Ambridge Water Auth was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Ambridge Water Auth use? ▼
Ambridge Water Auth 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.