Community Water System · PWS MO5010828
Walker PWS
Operator location Walker, Missouri - 31% of 106 violations are health-based (upper-third health share (> 23%)); groundwater source; 283 served per SDWIS.
- 283
- People served (this PWS)
- 106
- EPA violations (this PWS)
- 33
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Walker PWS standing, high SDWIS violation third
31% of 106 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 31% is upper-third health share (> 23%).
The verdict
Walker PWS sits in the upper third of the sitemap cohort by violation count (106), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (283; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 31% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 106
- Total EPA violations on record
- 31%
- Health-based (MCL / treatment failure)
- 283
- 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
- Community
- Owner Type
- Local
- Connections
- 104
- County
- Vernon
- School/Daycare
- No
- MCL Violations
- 25
- Monitoring Violations
- 63
- Treatment Tech Violations
- 8
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 36 | 2013 |
| Groundwater Rule | MR | 24 | 2022 |
| Combined Radium (-226 and -228) | MCL | 13 | 1983 |
| Gross Alpha, Excl. Radon and U | MCL | 12 | 1982 |
| Groundwater Rule | TT | 8 | 2014 |
| Lead and Copper Rule | MR | 3 | 2011 |
| Groundwater Rule | Other | 3 | 2014 |
| Public Notice | Other | 1 | 2014 |
Violation Count vs. the National Corpus
Walker PWS has 106 recorded EPA violations, 74% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 25% carry more. 31% of this system's own violations are health-based (33 of 106), 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)
106 Around the middle fewer violations than 25% 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 Walker PWS
33 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MO5010828.
Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch
Nationwide peers
106 violations · 283 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.
What to do with Walker PWS
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Missouri compares on the same EPA violation measures. Missouri 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.