SEWICKLEY BORO WATER AUTH

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 4, 2026

PWS ID: PA5020050 · SEWICKLEY, Pennsylvania 15143

SEWICKLEY BORO WATER AUTH serves 6,800 people in SEWICKLEY, Pennsylvania using Groundwater water sources. It has 214 recorded EPA violations, including 4 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (5 compounds found).

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 0.012 ppt. 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. SEWICKLEY BORO WATER AUTH's 214 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.

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

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 60 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
9Cl-PF3ONS	6/21/2023	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	6/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	6/21/2023	0.0066 µg/L	0.005 µg/L	Detected
6:2 FTS	6/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	6/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFMPA	6/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeA	6/21/2023	0.0120 µg/L	0.003 µg/L	Detected
PFPeS	6/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFEESA	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	6/21/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFBS	6/21/2023	0.0057 µg/L	0.003 µg/L	Detected
PFTA	6/21/2023	<0.008 µg/L	0.008 µg/L	Not Detected
11Cl-PF3OUdS	6/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFMBA	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	6/21/2023	0.0033 µg/L	0.003 µg/L	Detected
PFHpS	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	6/21/2023	<0.007 µg/L	0.007 µg/L	Not Detected
NMeFOSAA	6/21/2023	<0.006 µg/L	0.006 µg/L	Not Detected
lithium	6/21/2023	<9 µg/L	9 µg/L	Not Detected
NEtFOSAA	6/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFHpA	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	6/21/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFNA	6/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	6/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOA	6/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFDA	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	6/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	6/21/2023	0.0078 µg/L	0.003 µg/L	Detected
NEtFOSAA	12/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	12/13/2023	<0.007 µg/L	0.007 µg/L	Not Detected
NMeFOSAA	12/13/2023	<0.006 µg/L	0.006 µg/L	Not Detected
PFPeS	12/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
lithium	12/13/2023	<9 µg/L	9 µg/L	Not Detected
PFHpS	12/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	12/13/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	12/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	12/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	12/13/2023	0.0070 µg/L	0.003 µg/L	Detected
PFMPA	12/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	12/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	12/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	12/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	12/13/2023	0.0054 µg/L	0.005 µg/L	Detected
HFPO-DA	12/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFHpA	12/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	12/13/2023	<0.008 µg/L	0.008 µg/L	Not Detected
ADONA	12/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	12/13/2023	0.0045 µg/L	0.003 µg/L	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
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.

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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.

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