Non-Transient Non-Community Water System · PWS WI2682168
St Joan of Arc School
Operator location Nashotah, Wisconsin - 26% of 38 violations are health-based (upper-third health share (> 23%)); groundwater source; 190 served per SDWIS.
- 190
- People served (this PWS)
- 38
- EPA violations (this PWS)
- 10
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
St Joan of Arc School standing, mid SDWIS violation third
26% of 38 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 26% is upper-third health share (> 23%).
The verdict
St Joan of Arc School lands in the middle third by violation volume (38), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (190; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 26% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 38
- Total EPA violations on record
- 26%
- Health-based (MCL / treatment failure)
- 190
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Waukesha
- School/Daycare
- Yes
- MCL Violations
- 10
- Monitoring Violations
- 28
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 10 | 2003 |
| Revised Total Coliform Rule | MON | 4 | 2021 |
| Lead and Copper Rule | MR | 2 | 2014 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2002 |
| cis-1,2-Dichloroethylene | MR | 1 | 2002 |
| Xylenes, Total | MR | 1 | 2002 |
| Vinyl chloride | MR | 1 | 2002 |
| 1,1-Dichloroethylene | MR | 1 | 2002 |
| Nitrate | MR | 1 | 2002 |
| trans-1,2-Dichloroethylene | MR | 1 | 2002 |
| 1,2-Dichloroethane | MR | 1 | 2002 |
| Carbon tetrachloride | MR | 1 | 2002 |
| 1,2-Dichloropropane | MR | 1 | 2002 |
| Trichloroethylene | MR | 1 | 2002 |
| 1,1,2-Trichloroethane | MR | 1 | 2002 |
| Tetrachloroethylene | MR | 1 | 2002 |
| Toluene | MR | 1 | 2002 |
| Styrene | MR | 1 | 2002 |
| 1,1,1-Trichloroethane | MR | 1 | 2002 |
| o-Dichlorobenzene | MR | 1 | 2002 |
| DICHLOROMETHANE | MR | 1 | 2002 |
| CHLOROBENZENE | MR | 1 | 2002 |
| Benzene | MR | 1 | 2002 |
| p-Dichlorobenzene | MR | 1 | 2002 |
| Ethylbenzene | MR | 1 | 2002 |
Violation Count vs. the National Corpus
St Joan of Arc School has 38 recorded EPA violations, 49% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 50% carry more. 26% of this system's own violations are health-based (10 of 38), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
38 Lower than most fewer violations than 50% 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
Health-based violations on St Joan of Arc School
10 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI2682168.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
38 violations · 190 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with St Joan of Arc School
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.