Community Water System · PWS WI8020378
Mellen Water Utility
Operator location Mellen, Wisconsin - 26% of 19 violations are health-based (upper-third health share (> 23%)); groundwater source; 731 served per SDWIS.
- 731
- People served (this PWS)
- 19
- EPA violations (this PWS)
- 5
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Mellen Water Utility standing, low SDWIS violation third
26% of 19 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%). Population rank #23,770 of 29,740 among systems serving 500+.
The verdict
Mellen Water Utility is in the lower third by violation count (19; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is smaller (731; 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.
- #23,770 of 29,740
- Population · /systems
- #523 of 744
- Population · WI
- 19
- Total EPA violations on record
- 26%
- 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
- 397
- County
- Ashland
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 12
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 5 | 2014 |
| TTHM | MR | 4 | 2022 |
| Coliform (TCR) | MR | 4 | 1993 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2022 |
Violation Count vs. the National Corpus
Mellen Water Utility has 19 recorded EPA violations, 30% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 69% carry more. 26% of this system's own violations are health-based (5 of 19), and it ranks #23,770 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)
19 Lower than most fewer violations than 69% 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 Mellen Water Utility
5 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI8020378.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
19 violations · 731 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
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 Mellen Water Utility
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.