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Community Water System · PWS MO5010032

Ash Grove PWS

Ash Grove, Missouri 65604-0000 - drinking water served from groundwater sources to 1,472 people, tracked in EPA SDWIS and UCMR5.

1,472
People served
203
EPA violations
29
Health-based
Untested
UCMR5 result

The verdict

EPA records 203 drinking-water violations at Ash Grove PWS, 14% of them health-based - above the Missouri per-system average.

203
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
1,472
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ash Grove PWS

Ash Grove PWS is a local-owned community water system that delivers drinking water to 1,472 residents in Ash Grove, Missouri (Greene County) through 683 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 203 total violations for this system , of which 29 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 173 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 29 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Missouri, EPA tracks 2,823 public water systems serving 5,855,885 people, with 201,695 cumulative violations and 54,821 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 71.4 violations. Statewide, 162 of 230 UCMR5-tested systems have reported PFAS detections (70.4%).

Ash Grove PWS's 203 violations sit above the Missouri average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,472
Total Violations
203
Health-Based Violations
29
Water Source
Groundwater

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

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Ash Grove PWS.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MO5010032 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Missouri Drinking Water Authority

Missouri DNR, Public Drinking Water Branch is the primacy agency that licenses and inspects Ash Grove PWS under EPA-delegated authority.

Open MO regulator portal

Source: Missouri DNR, Public Drinking Water Branch

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Revised Total Coliform Rule MON 12 SDWIS / MO5010032 / 8000
2019 Nitrate-Nitrite MR 4 SDWIS / MO5010032 / 1038
2018 Lead and Copper Rule MR 11 SDWIS / MO5010032 / 5000
2017 1,2,4-Trichlorobenzene MR 4 SDWIS / MO5010032 / 2378
2017 cis-1,2-Dichloroethylene MR 4 SDWIS / MO5010032 / 2380
2017 1,1-Dichloroethylene MR 4 SDWIS / MO5010032 / 2977
2017 trans-1,2-Dichloroethylene MR 4 SDWIS / MO5010032 / 2979
2017 1,2-Dichloroethane MR 4 SDWIS / MO5010032 / 2980
2017 1,1,1-Trichloroethane MR 4 SDWIS / MO5010032 / 2981
2017 Carbon tetrachloride MR 4 SDWIS / MO5010032 / 2982
2017 1,2-Dichloropropane MR 4 SDWIS / MO5010032 / 2983
2017 Tetrachloroethylene MR 4 SDWIS / MO5010032 / 2987
2017 CHLOROBENZENE MR 4 SDWIS / MO5010032 / 2989
2017 Ethylbenzene MR 4 SDWIS / MO5010032 / 2992
2017 Styrene MR 4 SDWIS / MO5010032 / 2996

How Ash Grove PWS Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Ash Grove PWS Missouri avg Federal benchmark
Total violations 203 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 29 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 70.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,472 2,074 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,823 regulated public water systems in Missouri.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Ash Grove PWS water safe to drink? ▼
Ash Grove PWS (PWS ID: MO5010032) has 203 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,472 people using Groundwater sources.
How many people does Ash Grove PWS serve? ▼
Ash Grove PWS serves 1,472 people in Ash Grove, Missouri. It is a Local-owned system using Groundwater water sources with 683 service connections.
What type of violations does Ash Grove PWS have? ▼
Ash Grove PWS has 203 total violations: 29 health-based violations (MCL exceedances or treatment failures), 173 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ash Grove PWS water? ▼
No PFAS testing data is available for Ash Grove PWS under the EPA's UCMR5 monitoring program.
What water source does Ash Grove PWS use? ▼
Ash Grove PWS uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.