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Community Water System · PWS PA5650049

Derry Boro Muni Auth

Derry, Pennsylvania 15627 - drinking water served from surface water sources to 6,500 people, tracked in EPA SDWIS and UCMR5.

6,500
People served
330
EPA violations
1
Health-based
1 PFAS
UCMR5 result

The verdict

EPA records 330 drinking-water violations at Derry Boro Muni Auth - above the Pennsylvania per-system average, and UCMR5 testing detected 1 PFAS compound.

330
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
6,500
People served by this system
1
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Derry Boro Muni Auth

Derry Boro Muni Auth is a local-owned community water system that delivers drinking water to 6,500 residents in Derry, Pennsylvania (Westmoreland County) through 2,538 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 330 total violations for this system , of which 1 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 300 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 CARBON, TOTAL, recorded in 40 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 15 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%).

Derry Boro Muni Auth's 330 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

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

Population Served
6,500
Total Violations
330
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,538
County
Westmoreland
School/Daycare
No
MCL Violations
1
Monitoring Violations
300
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
CARBON, TOTAL MR 40 2024
Surface Water Treatment Rule MR 39 2019
Interim Enhanced Surface Water Treatment Rule MR 22 2022
Public Notice Other 18 2017
Chlorine MR 10 2019
TTHM MR 7 2024
Arsenic MR 7 2020
cis-1,2-Dichloroethylene MR 6 2011
o-Dichlorobenzene MR 6 2011
1,2-Dichloropropane MR 6 2011
CHLOROBENZENE MR 6 2011
Toluene MR 6 2011
Mercury MR 6 1986
DICHLOROMETHANE MR 6 2011
trans-1,2-Dichloroethylene MR 6 2011
1,1,2-Trichloroethane MR 6 2011
Ethylbenzene MR 6 2011
Styrene MR 6 2011
Nitrate MR 6 2018
Tetrachloroethylene MR 6 2011
1,2,4-Trichlorobenzene MR 6 2011
p-Dichlorobenzene MR 5 2011
Benzene MR 5 2011
Revised Total Coliform Rule MON 5 2025
Carbon tetrachloride MR 5 2011
Trichloroethylene MR 5 2011
1,1-Dichloroethylene MR 5 2011
Asbestos MR 5 2020
1,2-Dichloroethane MR 5 2011
1,1,1-Trichloroethane MR 5 2011

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFOA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
ADONA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFOS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 8/22/2023 <8.00 ppt 8.00 ppt Not Detected
PFPeA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 8/22/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/22/2023 10.20 ppt 3.00 ppt Detected
PFBA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 8/22/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 8/22/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 5/16/2023 <5.00 ppt 5.00 ppt Not Detected
PFEESA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 5/16/2023 5.70 ppt 3.00 ppt Detected
PFHxS 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 5/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 5/16/2023 <8.00 ppt 8.00 ppt Not Detected
PFOA 5/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFTrDA 5/16/2023 <7.00 ppt 7.00 ppt Not Detected
PFDoA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 5/16/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 5/16/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 5/16/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 5/16/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 5/16/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/16/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 5/16/2023 <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 Derry Boro Muni 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 PA5650049 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 Derry Boro Muni 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 Revised Total Coliform Rule MON 5 SDWIS / PA5650049 / 8000
2024 CARBON, TOTAL MR 40 SDWIS / PA5650049 / 2920
2024 TTHM MR 7 SDWIS / PA5650049 / 2950
2022 Interim Enhanced Surface Water Treatment Rule MR 22 SDWIS / PA5650049 / 0300
2022 CYANIDE MR 3 SDWIS / PA5650049 / 1024
2020 Arsenic MR 7 SDWIS / PA5650049 / 1005
2020 Asbestos MR 5 SDWIS / PA5650049 / 1094
2019 Surface Water Treatment Rule MR 39 SDWIS / PA5650049 / 0200
2019 Chlorine MR 10 SDWIS / PA5650049 / 0999
2019 Antimony, Total MR 4 SDWIS / PA5650049 / 1074
2018 Nitrate MR 6 SDWIS / PA5650049 / 1040
2018 Nitrite MR 3 SDWIS / PA5650049 / 1041
2017 Public Notice Other 18 SDWIS / PA5650049 / 7500
2017 Total Haloacetic Acids (HAA5) MR 5 SDWIS / PA5650049 / 2456
2017 Revised Total Coliform Rule RPT 5 SDWIS / PA5650049 / 8000

How Derry Boro Muni Auth Compares

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

Metric Derry Boro Muni Auth Pennsylvania avg Federal benchmark
Total violations 330 150.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 1 8.9 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 6,500 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 Derry Boro Muni Auth water safe to drink? ▼
Derry Boro Muni Auth (PWS ID: PA5650049) has 330 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 6,500 people using Surface Water sources.
How many people does Derry Boro Muni Auth serve? ▼
Derry Boro Muni Auth serves 6,500 people in Derry, Pennsylvania. It is a Local-owned system using Surface Water water sources with 2,538 service connections.
What type of violations does Derry Boro Muni Auth have? ▼
Derry Boro Muni Auth has 330 total violations: 1 health-based violations (MCL exceedances or treatment failures), 300 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Derry Boro Muni Auth water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in Derry Boro Muni Auth's water supply: PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Derry Boro Muni Auth use? ▼
Derry Boro Muni 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.