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Community Water System · PWS PA4140120

Walker Twp Water Assoc

Mingoville, Pennsylvania 16856 - drinking water served from groundwater sources to 3,250 people, tracked in EPA SDWIS and UCMR5.

3,250
People served
393
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 393 drinking-water violations at Walker Twp Water Assoc, 1% of them health-based - above the Pennsylvania per-system average.

393
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
3,250
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Walker Twp Water Assoc

Walker Twp Water Assoc is a private-owned community water system that delivers drinking water to 3,250 residents in Mingoville, Pennsylvania (Centre County) through 1,573 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 393 total violations for this system , of which 4 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 348 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 Endrin, recorded in 14 violations (MR). 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. Statewide, 224 of 389 UCMR5-tested systems have reported PFAS detections (57.6%).

Walker Twp Water Assoc's 393 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
3,250
Total Violations
393
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1,573
County
Centre
School/Daycare
No
MCL Violations
0
Monitoring Violations
348
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Endrin MR 14 2023
BHC-GAMMA MR 13 2023
Methoxychlor MR 13 2023
Toxaphene MR 13 2023
Nitrate MR 12 2022
Heptachlor epoxide MR 10 2023
Heptachlor MR 10 2023
Chlordane MR 10 2023
2,4,5-TP MR 9 2011
2,4-D MR 9 2011
Diquat MR 6 2011
Dinoseb MR 6 2011
Pentachlorophenol MR 6 2011
Dalapon MR 6 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 6 2011
ETHYLENE DIBROMIDE MR 6 2011
LASSO MR 6 2023
HEXACHLOROBENZENE MR 6 2023
Glyphosate MR 6 2011
Hexachlorocyclopentadiene MR 6 2023
Picloram MR 6 2011
Groundwater Rule MR 5 2024
Di(2-ethylhexyl) adipate MR 4 2020
Simazine MR 4 2020
Atrazine MR 4 2020
Combined Uranium MR 4 2019
Radium-226 MR 4 2019
Nitrite MR 4 2022
cis-1,2-Dichloroethylene MR 4 1993
Xylenes, Total MR 4 1993

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 Walker Twp Water Assoc.

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 PA4140120 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 Walker Twp Water Assoc 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 5 SDWIS / PA4140120 / 0700
2023 Endrin MR 14 SDWIS / PA4140120 / 2005
2023 BHC-GAMMA MR 13 SDWIS / PA4140120 / 2010
2023 Methoxychlor MR 13 SDWIS / PA4140120 / 2015
2023 Toxaphene MR 13 SDWIS / PA4140120 / 2020
2023 Heptachlor epoxide MR 10 SDWIS / PA4140120 / 2067
2023 Heptachlor MR 10 SDWIS / PA4140120 / 2065
2023 Chlordane MR 10 SDWIS / PA4140120 / 2959
2023 LASSO MR 6 SDWIS / PA4140120 / 2051
2023 HEXACHLOROBENZENE MR 6 SDWIS / PA4140120 / 2274
2023 Hexachlorocyclopentadiene MR 6 SDWIS / PA4140120 / 2042
2023 Revised Total Coliform Rule MON 3 SDWIS / PA4140120 / 8000
2022 Nitrate MR 12 SDWIS / PA4140120 / 1040
2022 Nitrite MR 4 SDWIS / PA4140120 / 1041
2022 Lead and Copper Rule MR 4 SDWIS / PA4140120 / 5000

How Walker Twp Water Assoc Compares

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

Metric Walker Twp Water Assoc Pennsylvania avg Federal benchmark
Total violations 393 150.6 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 None 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,250 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 Walker Twp Water Assoc water safe to drink? ▼
Walker Twp Water Assoc (PWS ID: PA4140120) has 393 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,250 people using Groundwater sources.
How many people does Walker Twp Water Assoc serve? ▼
Walker Twp Water Assoc serves 3,250 people in Mingoville, Pennsylvania. It is a Private-owned system using Groundwater water sources with 1,573 service connections.
What type of violations does Walker Twp Water Assoc have? ▼
Walker Twp Water Assoc has 393 total violations: 4 health-based violations (MCL exceedances or treatment failures), 348 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Walker Twp Water Assoc water? ▼
No PFAS testing data is available for Walker Twp Water Assoc under the EPA's UCMR5 monitoring program.
What water source does Walker Twp Water Assoc use? ▼
Walker Twp Water Assoc 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. 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.