Community Water System · PWS WI6490339
Milltown Waterworks
Operator location Milltown, Wisconsin - 64% of 47 violations are health-based (upper-third health share (> 23%)); groundwater source; 915 served per SDWIS.
- 915
- People served (this PWS)
- 47
- EPA violations (this PWS)
- 30
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Milltown Waterworks standing, mid SDWIS violation third
64% of 47 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 #20,797 of 29,740 among systems serving 500+.
The verdict
Milltown Waterworks lands in the middle third by violation volume (47), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (915; 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.
- #20,797 of 29,740
- Population · /systems
- #440 of 744
- Population · WI
- 47
- 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
- 338
- County
- Polk
- School/Daycare
- No
- MCL Violations
- 30
- Monitoring Violations
- 11
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 30 | 2015 |
| Lead and Copper Rule | MR | 5 | 2012 |
| Coliform (TCR) | MR | 4 | 2000 |
| Consumer Confidence Rule | Other | 4 | 2002 |
| Atrazine | MR | 2 | 1994 |
Violation Count vs. the National Corpus
Milltown Waterworks has 47 recorded EPA violations, 55% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 45% carry more. 64% of this system's own violations are health-based (30 of 47), and it ranks #20,797 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)
47 Around the middle fewer violations than 45% 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 Milltown Waterworks
30 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI6490339.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
47 violations · 915 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 Milltown 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.