Community Water System · PWS WI6470141
Pepin Waterworks
Operator location Pepin, Wisconsin - 64% of 70 violations are health-based (upper-third health share (> 23%)); groundwater source; 816 served per SDWIS.
- 816
- People served (this PWS)
- 70
- EPA violations (this PWS)
- 45
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Pepin Waterworks standing, mid SDWIS violation third
64% of 70 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 64% is upper-third health share (> 23%). Population rank #22,202 of 29,740 among systems serving 500+.
The verdict
Pepin Waterworks lands in the middle third by violation volume (70), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (816; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 64% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #22,202 of 29,740
- Population · /systems
- #476 of 744
- Population · WI
- 70
- Total EPA violations on record
- 64%
- 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
- 514
- County
- Pepin
- School/Daycare
- No
- MCL Violations
- 24
- Monitoring Violations
- 9
- Treatment Tech Violations
- 21
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 24 | 1995 |
| Consumer Confidence Rule | Other | 9 | 2021 |
| Lead and Copper Rule | TT | 8 | 2023 |
| Lead and Copper Rule | MR | 6 | 2021 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 6 | 2025 |
| Groundwater Rule | TT | 6 | 2014 |
| Public Notice | Other | 4 | 2024 |
| Revised Total Coliform Rule | MON | 3 | 2025 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Violation Count vs. the National Corpus
Pepin Waterworks has 70 recorded EPA violations, 65% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 35% carry more. 64% of this system's own violations are health-based (45 of 70), and it ranks #22,202 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)
70 Around the middle fewer violations than 35% 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 Pepin Waterworks
45 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI6470141.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
70 violations · 816 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Pepin 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.