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Community Water System · PWS WI6090462

Stanley Waterworks

Operator location Stanley, Wisconsin - larger served population (> 3,309) at 3,500 people served; 106 SDWIS violations on record from groundwater sources.

3,500
People served (this PWS)
106
EPA violations (this PWS)
9
Health-based (this PWS)
No PFAS
UCMR5 (this PWS)
Follow published updates (RSS)

Stanley Waterworks standing, high SDWIS violation third

3,500 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 8% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #9,658 of 29,740 among systems serving 500+.

The verdict

Stanley Waterworks sits in the upper third of the sitemap cohort by violation count (106), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (3,500; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 8% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.

#9,658 of 29,740
Population · /systems
#183 of 744
Population · WI
106
Total EPA violations on record
8%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

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

Violation Count vs. the National Corpus

Stanley Waterworks has 106 recorded EPA violations, 74% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 25% carry more. 8% of this system's own violations are health-based (9 of 106), and it ranks #9,658 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

106 Around the middle fewer violations than 25% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 174 samples detected PFAS.

Contaminant Date Result MRL Status
PFDoA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
PFBS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/21/2024 <7.00 ppt 7.00 ppt Not Detected
4:2 FTS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 8/21/2024 <6.00 ppt 6.00 ppt Not Detected
PFHpA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
PFDA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFTA 8/21/2024 <8.00 ppt 8.00 ppt Not Detected
PFNA 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFUnA 8/21/2024 <2.00 ppt 2.00 ppt Not Detected
8:2 FTS 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
PFPeA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/21/2024 <20.00 ppt 20.00 ppt Not Detected
9Cl-PF3ONS 8/21/2024 <2.00 ppt 2.00 ppt Not Detected
PFMBA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/21/2024 <2.00 ppt 2.00 ppt Not Detected
PFHxA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/21/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
PFTA 8/21/2024 <8.00 ppt 8.00 ppt Not Detected
11Cl-PF3OUdS 8/21/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpS 8/21/2024 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 8/21/2024 <6.00 ppt 6.00 ppt Not Detected
PFTrDA 8/21/2024 <7.00 ppt 7.00 ppt Not Detected
PFPeS 8/21/2024 <4.00 ppt 4.00 ppt Not Detected
NFDHA 8/21/2024 <20.00 ppt 20.00 ppt Not Detected
PFEESA 8/21/2024 <3.00 ppt 3.00 ppt Not Detected

Population served record for Stanley Waterworks

EPA SDWIS lists 3,500 people served and 882 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.

Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater

Nationwide peers

106 violations · 3,500 served: nearest cross-state SDWIS matches.

What to do with Stanley Waterworks

Use this system's EPA-reported record as a starting filter, not a final verdict.

  • See how every tracked system in Wisconsin compares on the same EPA violation measures. Wisconsin systems
  • Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
  • Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater