Community Water System · PWS WI4050456
Ashwaubenon Waterworks
Operator location Ashwaubenon, Wisconsin - 99% of 117 violations are health-based (upper-third health share (> 23%)); surface water source; 17,730 served per SDWIS.
- 17,730
- People served (this PWS)
- 117
- EPA violations (this PWS)
- 116
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Ashwaubenon Waterworks standing, high SDWIS violation third
99% of 117 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 99% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #3,009 of 29,740 among systems serving 500+.
The verdict
Ashwaubenon Waterworks sits in the upper third of the sitemap cohort by violation count (117), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (17,730; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 99% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #3,009 of 29,740
- Population · /systems
- #44 of 744
- Population · WI
- 117
- Total EPA violations on record
- 99%
- 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
- 6,566
- County
- Brown
- School/Daycare
- No
- MCL Violations
- 116
- Monitoring Violations
- 1
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 60 | 2001 |
| Gross Alpha, Excl. Radon and U | MCL | 55 | 2001 |
| Revised Total Coliform Rule | MON | 1 | 2025 |
| Fluoride | MCL | 1 | 1978 |
Violation Count vs. the National Corpus
Ashwaubenon Waterworks has 117 recorded EPA violations, 76% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 24% carry more. 99% of this system's own violations are health-based (116 of 117), and it ranks #3,009 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)
117 Higher than most more violations than 76% 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 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NFDHA | 8/7/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| 6:2 FTS | 8/7/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 8/7/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 8/7/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 8/7/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 8/7/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 8/7/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 8/7/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 8/7/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 8/7/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NMeFOSAA | 8/7/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFHpA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 8/7/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| ADONA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/7/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 8/7/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/7/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/7/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFNA | 8/7/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 8/7/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 5/8/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 5/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 5/8/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 5/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 5/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 5/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 5/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 5/8/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeA | 5/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 5/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 5/8/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 5/8/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 5/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 5/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 5/8/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 5/8/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 5/8/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| NEtFOSAA | 5/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 5/8/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| 6:2 FTS | 5/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 5/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Ashwaubenon Waterworks
116 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI4050456.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
117 violations · 17,730 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Ashwaubenon 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.