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Community Water System · PWS IA1773097

Rockwell Water Supply

Rockwell, Iowa 50469 - drinking water served from groundwater sources to 1,071 people, tracked in EPA SDWIS and UCMR5.

1,071
People served
40
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 40 drinking-water violations at Rockwell Water Supply, 10% of them health-based - below the Iowa per-system average.

40
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
1,071
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rockwell Water Supply

Rockwell Water Supply is a local-owned community water system that delivers drinking water to 1,071 residents in Rockwell, Iowa (Cerro Gordo County) through 433 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 40 total violations for this system , of which 4 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 21 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Nitrite, recorded in 4 violations (MR). 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%).

Rockwell Water Supply's 40 violations sit below 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
1,071
Total Violations
40
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
433
County
Cerro Gordo
School/Daycare
No
MCL Violations
4
Monitoring Violations
21
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrite MR 4 2023
TTHM MR 4 2017
Fluoride MCL 4 1984
Coliform (TCR) MR 4 1991
Total Haloacetic Acids (HAA5) MR 4 2017
Lead and Copper Rule MR 3 2000
Combined Radium (-226 and -228) MR 1 2009
Gross Alpha, Excl. Radon and U MR 1 2009

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 Rockwell Water Supply.

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 IA1773097 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
2023 Nitrite MR 4 SDWIS / IA1773097 / 1041
2017 TTHM MR 4 SDWIS / IA1773097 / 2950
2017 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IA1773097 / 2456
2009 Combined Radium (-226 and -228) MR 1 SDWIS / IA1773097 / 4010
2009 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IA1773097 / 4000
2000 Lead and Copper Rule MR 3 SDWIS / IA1773097 / 5000
1991 Coliform (TCR) MR 4 SDWIS / IA1773097 / 3100
1984 Fluoride MCL 4 SDWIS / IA1773097 / 1025

How Rockwell Water Supply Compares

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

Metric Rockwell Water Supply Iowa avg Federal benchmark
Total violations 40 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 1,071 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 Rockwell Water Supply water safe to drink? ▼
Rockwell Water Supply (PWS ID: IA1773097) has 40 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,071 people using Groundwater sources.
How many people does Rockwell Water Supply serve? ▼
Rockwell Water Supply serves 1,071 people in Rockwell, Iowa. It is a Local-owned system using Groundwater water sources with 433 service connections.
What type of violations does Rockwell Water Supply have? ▼
Rockwell Water Supply has 40 total violations: 4 health-based violations (MCL exceedances or treatment failures), 21 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rockwell Water Supply water? ▼
No PFAS testing data is available for Rockwell Water Supply under the EPA's UCMR5 monitoring program.
What water source does Rockwell Water Supply use? ▼
Rockwell Water Supply 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.