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Community Water System · PWS IA8055014

Mount Ayr Water Treatment Plant

Mount Ayr, Iowa 50854 - drinking water served from surface water sources to 1,683 people, tracked in EPA SDWIS and UCMR5.

1,683
People served
611
EPA violations
50
Health-based
Untested
UCMR5 result

The verdict

EPA records 611 drinking-water violations at Mount Ayr Water Treatment Plant, 8% of them health-based - above the Iowa per-system average.

611
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
1,683
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mount Ayr Water Treatment Plant

Mount Ayr Water Treatment Plant is a local-owned community water system that delivers drinking water to 1,683 residents in Mount Ayr, Iowa (Ringgold County) through 900 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 611 total violations for this system , of which 50 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 376 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is TTHM, recorded in 50 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 Iowa, EPA tracks 1,795 public water systems serving 3,114,444 people, with 138,271 cumulative violations and 27,946 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 77 violations. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%).

Mount Ayr Water Treatment Plant's 611 violations sit above the Iowa 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
1,683
Total Violations
611
Health-Based Violations
50
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
900
County
Ringgold
School/Daycare
No
MCL Violations
50
Monitoring Violations
376
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 50 2002
Benzene MR 23 1991
1,2-Dichloropropane MR 22 1991
cis-1,2-Dichloroethylene MR 22 1991
1,1-Dichloroethylene MR 22 1991
Tetrachloroethylene MR 22 1991
1,2-Dichloroethane MR 22 1991
CHLOROBENZENE MR 22 1991
Toluene MR 22 1991
Styrene MR 22 1991
DICHLOROMETHANE MR 20 1991
Trichloroethylene MR 19 1991
p-Dichlorobenzene MR 16 1991
trans-1,2-Dichloroethylene MR 16 1991
Ethylbenzene MR 16 1991
1,1,2-Trichloroethane MR 15 1991
o-Dichlorobenzene MR 13 1991
Carbon tetrachloride MR 11 1991
1,1,1-Trichloroethane MR 10 1991
Xylenes, Total MR 10 1991
Revised Total Coliform Rule MON 7 2022
Coliform (TCR) MR 4 2011
Chlorine MR 4 2011
Total Haloacetic Acids (HAA5) MR 4 2011
TTHM MR 4 2011
Barium MR 1 1982
Nitrate MR 1 1982
Selenium MR 1 1982
Arsenic MR 1 1982
Mercury MR 1 1982

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 Mount Ayr Water Treatment Plant.

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 IA8055014 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Iowa Drinking Water Authority

Iowa's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find IA regulator via EPA SDWIS

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
2022 Revised Total Coliform Rule MON 7 SDWIS / IA8055014 / 8000
2011 Coliform (TCR) MR 4 SDWIS / IA8055014 / 3100
2011 Chlorine MR 4 SDWIS / IA8055014 / 0999
2011 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IA8055014 / 2456
2011 TTHM MR 4 SDWIS / IA8055014 / 2950
2002 TTHM MCL 50 SDWIS / IA8055014 / 2950
1991 Benzene MR 23 SDWIS / IA8055014 / 2990
1991 1,2-Dichloropropane MR 22 SDWIS / IA8055014 / 2983
1991 cis-1,2-Dichloroethylene MR 22 SDWIS / IA8055014 / 2380
1991 1,1-Dichloroethylene MR 22 SDWIS / IA8055014 / 2977
1991 Tetrachloroethylene MR 22 SDWIS / IA8055014 / 2987
1991 1,2-Dichloroethane MR 22 SDWIS / IA8055014 / 2980
1991 CHLOROBENZENE MR 22 SDWIS / IA8055014 / 2989
1991 Toluene MR 22 SDWIS / IA8055014 / 2991
1991 Styrene MR 22 SDWIS / IA8055014 / 2996

How Mount Ayr Water Treatment Plant Compares

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

Metric Mount Ayr Water Treatment Plant Iowa avg Federal benchmark
Total violations 611 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 50 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 83.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,683 1,735 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,795 regulated public water systems in Iowa.

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 Mount Ayr Water Treatment Plant water safe to drink? ▼
Mount Ayr Water Treatment Plant (PWS ID: IA8055014) has 611 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,683 people using Surface Water sources.
How many people does Mount Ayr Water Treatment Plant serve? ▼
Mount Ayr Water Treatment Plant serves 1,683 people in Mount Ayr, Iowa. It is a Local-owned system using Surface Water water sources with 900 service connections.
What type of violations does Mount Ayr Water Treatment Plant have? ▼
Mount Ayr Water Treatment Plant has 611 total violations: 50 health-based violations (MCL exceedances or treatment failures), 376 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mount Ayr Water Treatment Plant water? ▼
No PFAS testing data is available for Mount Ayr Water Treatment Plant under the EPA's UCMR5 monitoring program.
What water source does Mount Ayr Water Treatment Plant use? ▼
Mount Ayr Water Treatment Plant uses Surface Water 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.