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Community Water System · PWS PA5020050

Sewickley Boro Water Auth

Sewickley, Pennsylvania 15143 - drinking water served from groundwater sources to 6,800 people, tracked in EPA SDWIS and UCMR5.

6,800
People served
214
EPA violations
4
Health-based
5 PFAS
UCMR5 result

The verdict

EPA records 214 drinking-water violations at Sewickley Boro Water Auth, 2% of them health-based - above the Pennsylvania per-system average, and UCMR5 testing detected 5 PFAS compounds.

214
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
6,800
People served by this system
5
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sewickley Boro Water Auth

Sewickley Boro Water Auth is a local-owned community water system that delivers drinking water to 6,800 residents in Sewickley, Pennsylvania (Allegheny County) through 2,183 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 214 total violations for this system , of which 4 (2%) 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 2024.

The most frequently cited contaminant at this system is Groundwater Rule, recorded in 11 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 5 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 12 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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%).

Sewickley Boro Water Auth's 214 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.

PFAS Detected

5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
6,800
Total Violations
214
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,183
County
Allegheny
School/Daycare
No
MCL Violations
0
Monitoring Violations
206
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule MR 11 2024
Di(2-ethylhexyl) phthalate MR 11 1995
Hexachlorocyclopentadiene MR 11 1995
Pentachlorophenol MR 11 1995
Di(2-ethylhexyl) adipate MR 11 1995
Benzo(a)pyrene MR 11 1995
Aldicarb sulfoxide MR 11 1995
Aldicarb sulfone MR 11 1995
Chlorine MR 7 2021
Xylenes, Total MR 5 2014
DICHLOROMETHANE MR 4 2004
o-Dichlorobenzene MR 4 2004
p-Dichlorobenzene MR 4 2004
1,1-Dichloroethylene MR 4 2004
1,1,1-Trichloroethane MR 4 2004
Carbon tetrachloride MR 4 2004
Trichloroethylene MR 4 2004
1,1,2-Trichloroethane MR 4 2004
Benzene MR 4 2004
Toluene MR 4 2004
Styrene MR 4 2004
E. COLI MR 4 2011
Combined Uranium MR 4 2011
Radium-226 MR 4 2011
Total Haloacetic Acids (HAA5) MR 4 2019
TTHM MR 4 2019
Lead and Copper Rule MR 4 2019
Radium-228 MR 4 2011
cis-1,2-Dichloroethylene MR 4 2004
1,2-Dichloroethane MR 4 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 10 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/21/2023 6.60 ppt 5.00 ppt Detected
6:2 FTS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/21/2023 12.00 ppt 3.00 ppt Detected
PFPeS 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/21/2023 <20.00 ppt 20.00 ppt Not Detected
PFBS 6/21/2023 5.70 ppt 3.00 ppt Detected
PFTA 6/21/2023 <8.00 ppt 8.00 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
PFHxS 6/21/2023 3.30 ppt 3.00 ppt Detected
PFHpS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/21/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 6/21/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
PFNA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/21/2023 7.80 ppt 3.00 ppt Detected
NEtFOSAA 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 12/13/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 12/13/2023 <6.00 ppt 6.00 ppt Not Detected
PFPeS 12/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 12/13/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 12/13/2023 7.00 ppt 3.00 ppt Detected
PFMPA 12/13/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 12/13/2023 5.40 ppt 5.00 ppt Detected
HFPO-DA 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 12/13/2023 <8.00 ppt 8.00 ppt Not Detected
ADONA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 12/13/2023 4.50 ppt 3.00 ppt Detected
PFHxS 12/13/2023 3.20 ppt 3.00 ppt Detected
PFNA 12/13/2023 <4.00 ppt 4.00 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 Sewickley Boro 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 PA5020050 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 Sewickley Boro 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
2024 Groundwater Rule MR 11 SDWIS / PA5020050 / 0700
2024 Revised Total Coliform Rule TT 3 SDWIS / PA5020050 / 8000
2024 Revised Total Coliform Rule RPT 2 SDWIS / PA5020050 / 8000
2024 Public Notice Other 2 SDWIS / PA5020050 / 7500
2021 Chlorine MR 7 SDWIS / PA5020050 / 0999
2019 Total Haloacetic Acids (HAA5) MR 4 SDWIS / PA5020050 / 2456
2019 TTHM MR 4 SDWIS / PA5020050 / 2950
2019 Lead and Copper Rule MR 4 SDWIS / PA5020050 / 5000
2014 Xylenes, Total MR 5 SDWIS / PA5020050 / 2955
2012 Coliform (TCR) MR 1 SDWIS / PA5020050 / 3100
2011 E. COLI MR 4 SDWIS / PA5020050 / 3014
2011 Combined Uranium MR 4 SDWIS / PA5020050 / 4006
2011 Radium-226 MR 4 SDWIS / PA5020050 / 4020
2011 Radium-228 MR 4 SDWIS / PA5020050 / 4030
2011 Groundwater Rule TT 1 SDWIS / PA5020050 / 0700

How Sewickley Boro Water Auth Compares

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

Metric Sewickley Boro Water Auth Pennsylvania avg Federal benchmark
Total violations 214 150.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 8.9 Indicates a contaminant exceeded a federal MCL
PFAS detection 5 compounds 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 6,800 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 Sewickley Boro Water Auth water safe to drink? ▼
Sewickley Boro Water Auth (PWS ID: PA5020050) has 214 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 5 PFAS compounds found. This system serves 6,800 people using Groundwater sources.
How many people does Sewickley Boro Water Auth serve? ▼
Sewickley Boro Water Auth serves 6,800 people in Sewickley, Pennsylvania. It is a Local-owned system using Groundwater water sources with 2,183 service connections.
What type of violations does Sewickley Boro Water Auth have? ▼
Sewickley Boro Water Auth has 214 total violations: 4 health-based violations (MCL exceedances or treatment failures), 206 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sewickley Boro Water Auth water? ▼
Yes. UCMR5 testing detected 5 PFAS compounds in Sewickley Boro Water Auth's water supply: PFBA, PFPeA, PFBS, PFHxS, PFHxA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Sewickley Boro Water Auth use? ▼
Sewickley Boro Water Auth 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. 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.