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Community Water System · PWS IA1570032

Wiota Water Works

Wiota, Iowa 50274 - drinking water served from groundwater sources to 95 people, tracked in EPA SDWIS and UCMR5.

95
People served
176
EPA violations
92
Health-based
Untested
UCMR5 result

The verdict

EPA records 176 drinking-water violations at Wiota Water Works, 52% of them health-based - above the Iowa per-system average.

176
Total EPA violations on record
52%
Health-based (MCL / treatment failure)
95
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wiota Water Works

Wiota Water Works is a local-owned community water system that delivers drinking water to 95 residents in Wiota, Iowa (Cass County) through 70 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 176 total violations for this system , of which 92 (52%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 47 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 Nitrate, recorded in 64 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, 32 of 152 UCMR5-tested systems have reported PFAS detections (21.1%).

Wiota Water Works's 176 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
95
Total Violations
176
Health-Based Violations
92
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
70
County
Cass
School/Daycare
No
MCL Violations
92
Monitoring Violations
47
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MCL 64 1994
Coliform (TCR) MCL 28 2007
1,1,1-Trichloroethane MR 20 1993
Nitrate MR 11 1994
Consumer Confidence Rule Other 7 2023
Total Haloacetic Acids (HAA5) MR 5 2025
Nitrate Other 5 1986
TTHM MR 5 2025
Lead and Copper Rule MR 3 2011
Combined Radium (-226 and -228) MR 3 2019

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 Wiota Water Works.

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 IA1570032 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
2025 Total Haloacetic Acids (HAA5) MR 5 SDWIS / IA1570032 / 2456
2025 TTHM MR 5 SDWIS / IA1570032 / 2950
2023 Consumer Confidence Rule Other 7 SDWIS / IA1570032 / 7000
2019 Combined Radium (-226 and -228) MR 3 SDWIS / IA1570032 / 4010
2011 Lead and Copper Rule MR 3 SDWIS / IA1570032 / 5000
2007 Coliform (TCR) MCL 28 SDWIS / IA1570032 / 3100
1994 Nitrate MCL 64 SDWIS / IA1570032 / 1040
1994 Nitrate MR 11 SDWIS / IA1570032 / 1040
1993 1,1,1-Trichloroethane MR 20 SDWIS / IA1570032 / 2981
1986 Nitrate Other 5 SDWIS / IA1570032 / 1040

How Wiota Water Works Compares

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

Metric Wiota Water Works Iowa avg Federal benchmark
Total violations 176 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 92 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 21.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 95 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 Wiota Water Works water safe to drink? ▼
Wiota Water Works (PWS ID: IA1570032) has 176 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 95 people using Groundwater sources.
How many people does Wiota Water Works serve? ▼
Wiota Water Works serves 95 people in Wiota, Iowa. It is a Local-owned system using Groundwater water sources with 70 service connections.
What type of violations does Wiota Water Works have? ▼
Wiota Water Works has 176 total violations: 92 health-based violations (MCL exceedances or treatment failures), 47 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wiota Water Works water? ▼
No PFAS testing data is available for Wiota Water Works under the EPA's UCMR5 monitoring program.
What water source does Wiota Water Works use? ▼
Wiota Water Works 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.