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STANLEY WATERWORKS

PWS ID: WI6090462 · STANLEY, Wisconsin 54768-0155

STANLEY WATERWORKS serves 3,500 people in STANLEY, Wisconsin using Groundwater water sources. It has 106 recorded EPA violations, including 9 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: STANLEY WATERWORKS

STANLEY WATERWORKS is a local-owned community water system that delivers drinking water to 3,500 residents in STANLEY, Wisconsin (Chippewa County) through 882 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 106 total violations for this system , of which 9 (8%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 96 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 Coliform (TCR), recorded in 5 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. STANLEY WATERWORKS's 106 violations sit above the Wisconsin average. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%). 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
3,500
Total Violations
106
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
882
County
Chippewa
School/Daycare
No
MCL Violations
5
Monitoring Violations
96
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 5 1995
Toxaphene MR 4 2017
Glyphosate MR 4 2017
Simazine MR 4 2017
Atrazine MR 4 2017
Heptachlor epoxide MR 4 2017
2,4-D MR 4 2017
HEXACHLOROBENZENE MR 4 2017
Pentachlorophenol MR 4 2017
2,4,5-TP MR 4 2017
Picloram MR 4 2017
Groundwater Rule TT 4 2017
Diquat MR 4 2017
Carbofuran MR 4 2017
Dinoseb MR 4 2017
Dalapon MR 4 2017
Endrin MR 4 2017
BHC-GAMMA MR 4 2017
Endothall MR 4 2017
Methoxychlor MR 4 2017
Heptachlor MR 4 2017
Hexachlorocyclopentadiene MR 4 2017
Chlordane MR 4 2017
OXAMYL MR 4 2017
LASSO MR 4 2017
Revised Total Coliform Rule MON 3 2025
Consumer Confidence Rule Other 1 2002
Lead and Copper Rule MR 1 2012

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 180 samples detected PFAS.

Contaminant Date Result MRL Status
PFDoA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 8/21/2024 <0.007 µg/L 0.007 µg/L Not Detected
4:2 FTS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/21/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHpA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/21/2024 <9 µg/L 9 µg/L Not Detected
PFTA 8/21/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFNA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
8:2 FTS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/21/2024 <0.02 µg/L 0.02 µg/L Not Detected
9Cl-PF3ONS 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFMBA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/21/2024 <9 µg/L 9 µg/L Not Detected
PFHxS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/21/2024 <0.008 µg/L 0.008 µg/L Not Detected
11Cl-PF3OUdS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/21/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/21/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFPeS 8/21/2024 <0.004 µg/L 0.004 µg/L 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 STANLEY WATERWORKS.

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 WI6090462 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR — Drinking Water and Groundwater is the primacy agency that licenses and inspects STANLEY WATERWORKS under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR — Drinking Water and Groundwater

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 3 SDWIS / WI6090462 / 8000
2017 Toxaphene MR 4 SDWIS / WI6090462 / 2020
2017 Glyphosate MR 4 SDWIS / WI6090462 / 2034
2017 Simazine MR 4 SDWIS / WI6090462 / 2037
2017 Atrazine MR 4 SDWIS / WI6090462 / 2050
2017 Heptachlor epoxide MR 4 SDWIS / WI6090462 / 2067
2017 2,4-D MR 4 SDWIS / WI6090462 / 2105
2017 HEXACHLOROBENZENE MR 4 SDWIS / WI6090462 / 2274
2017 Pentachlorophenol MR 4 SDWIS / WI6090462 / 2326
2017 2,4,5-TP MR 4 SDWIS / WI6090462 / 2110
2017 Picloram MR 4 SDWIS / WI6090462 / 2040
2017 Groundwater Rule TT 4 SDWIS / WI6090462 / 0700
2017 Diquat MR 4 SDWIS / WI6090462 / 2032
2017 Carbofuran MR 4 SDWIS / WI6090462 / 2046
2017 Dinoseb MR 4 SDWIS / WI6090462 / 2041

How STANLEY WATERWORKS Compares

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

Metric STANLEY WATERWORKS Wisconsin avg Federal benchmark
Total violations 106 26 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 9 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,500 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

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 STANLEY WATERWORKS water safe to drink? ▼
STANLEY WATERWORKS (PWS ID: WI6090462) has 106 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,500 people using Groundwater sources.
How many people does STANLEY WATERWORKS serve? ▼
STANLEY WATERWORKS serves 3,500 people in STANLEY, Wisconsin. It is a Local-owned system using Groundwater water sources with 882 service connections.
What type of violations does STANLEY WATERWORKS have? ▼
STANLEY WATERWORKS has 106 total violations: 9 health-based violations (MCL exceedances or treatment failures), 96 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in STANLEY WATERWORKS water? ▼
No. STANLEY WATERWORKS was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does STANLEY WATERWORKS use? ▼
STANLEY WATERWORKS 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.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial