Community Water System · PWS MO5010032
Ash Grove PWS
Operator location Ash Grove, Missouri - upper-third violation load (> 74 violations) with 203 EPA violations; groundwater source; 1,472 served (PWS-level, not municipal population).
- 1,472
- People served (this PWS) Middle third of systems
- 203
- EPA violations (this PWS) Upper third of systems
- 29
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Ash Grove PWS standing, high SDWIS violation third
203 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). Population rank #16,178 of 29,740 among systems serving 500+.
The verdict
Ash Grove PWS sits in the upper third of the sitemap cohort by violation count (203), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,472 (mid served population (≤ 3,309)). Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #16,178 of 29,740
- Population · /systems
- #398 of 738
- Population · MO
- 203
- Total EPA violations on record
- 14%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 683
- County
- Greene
- School/Daycare
- No
- MCL Violations
- 29
- Monitoring Violations
- 173
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 29 | 2015 |
| Revised Total Coliform Rule | MON | 12 | 2025 |
| Lead and Copper Rule | MR | 11 | 2018 |
| Coliform (TCR) | MR | 10 | 2015 |
| Radium-226 | MR | 4 | 2014 |
| Radium-228 | MR | 4 | 2014 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2017 |
| cis-1,2-Dichloroethylene | MR | 4 | 2017 |
| 1,1-Dichloroethylene | MR | 4 | 2017 |
| trans-1,2-Dichloroethylene | MR | 4 | 2017 |
| 1,2-Dichloroethane | MR | 4 | 2017 |
| 1,1,1-Trichloroethane | MR | 4 | 2017 |
| Carbon tetrachloride | MR | 4 | 2017 |
| 1,2-Dichloropropane | MR | 4 | 2017 |
| Tetrachloroethylene | MR | 4 | 2017 |
| CHLOROBENZENE | MR | 4 | 2017 |
| Ethylbenzene | MR | 4 | 2017 |
| Styrene | MR | 4 | 2017 |
| Arsenic | MR | 4 | 2017 |
| Chromium | MR | 4 | 2017 |
| Fluoride | MR | 4 | 2017 |
| Antimony, Total | MR | 4 | 2017 |
| Selenium | MR | 4 | 2017 |
| Cadmium | MR | 4 | 2017 |
| Toluene | MR | 4 | 2017 |
| Beryllium, Total | MR | 4 | 2017 |
| Nitrate-Nitrite | MR | 4 | 2019 |
| o-Dichlorobenzene | MR | 4 | 2017 |
| Barium | MR | 4 | 2017 |
| CYANIDE | MR | 4 | 2017 |
Violation Count vs. the National Corpus
Ash Grove PWS has 203 recorded EPA violations, 86% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 14% carry more. 14% of this system's own violations are health-based (29 of 203), and it ranks #16,178 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)
203 Higher than most more violations than 86% 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
How many violations vs. how serious, among peer systems
Ash Grove PWS plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
SDWIS compliance record for Ash Grove PWS
203 violations on record for MO5010032; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch
Nationwide peers
203 violations · 1,472 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.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Ash Grove 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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.