PlainWater
States → Iowa

Community Water System · PWS IA5208071

Coralville Muni Water System

Coralville, Iowa 52241 - drinking water served from groundwater sources to 22,318 people, tracked in EPA SDWIS and UCMR5.

22,318
People served
198
EPA violations
3
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 198 drinking-water violations at Coralville Muni Water System, 2% of them health-based - above the Iowa per-system average.

198
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
22,318
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Coralville Muni Water System

Coralville Muni Water System is a local-owned community water system that delivers drinking water to 22,318 residents in Coralville, Iowa (Johnson County) through 6,500 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 198 total violations for this system , of which 3 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 104 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is cis-1,2-Dichloroethylene, recorded in 8 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Coralville Muni Water System's 198 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
22,318
Total Violations
198
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
6,500
County
Johnson
School/Daycare
No
MCL Violations
3
Monitoring Violations
104
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 8 1991
Ethylbenzene MR 8 1991
o-Dichlorobenzene MR 8 1991
Styrene MR 8 1991
trans-1,2-Dichloroethylene MR 8 1991
Revised Total Coliform Rule MON 8 2018
Toluene MR 8 1991
1,1,2-Trichloroethane MR 8 1991
DICHLOROMETHANE MR 8 1991
CHLOROBENZENE MR 8 1991
Tetrachloroethylene MR 8 1991
Xylenes, Total MR 8 1991
1,2-Dichloropropane MR 8 1991
Coliform (TCR) MCL 3 1991

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
ADONA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 6/12/2023 <6.00 ppt 6.00 ppt Not Detected
HFPO-DA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 6/12/2023 <2.00 ppt 2.00 ppt Not Detected
8:2 FTS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 6/12/2023 <20.00 ppt 20.00 ppt Not Detected
PFUnA 6/12/2023 <2.00 ppt 2.00 ppt Not Detected
PFEESA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 6/12/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 6/12/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 12/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxA 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 12/11/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 12/11/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 12/11/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 12/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 12/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeA 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 12/11/2023 <4.00 ppt 4.00 ppt Not Detected
PFDoA 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 12/11/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 12/11/2023 <6.00 ppt 6.00 ppt Not Detected
PFTA 12/11/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 12/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 12/11/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 12/11/2023 <20.00 ppt 20.00 ppt Not Detected
PFHpA 12/11/2023 <3.00 ppt 3.00 ppt Not Detected

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 Coralville Muni Water System.

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 IA5208071 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
2018 Revised Total Coliform Rule MON 8 SDWIS / IA5208071 / 8000
1991 cis-1,2-Dichloroethylene MR 8 SDWIS / IA5208071 / 2380
1991 Ethylbenzene MR 8 SDWIS / IA5208071 / 2992
1991 o-Dichlorobenzene MR 8 SDWIS / IA5208071 / 2968
1991 Styrene MR 8 SDWIS / IA5208071 / 2996
1991 trans-1,2-Dichloroethylene MR 8 SDWIS / IA5208071 / 2979
1991 Toluene MR 8 SDWIS / IA5208071 / 2991
1991 1,1,2-Trichloroethane MR 8 SDWIS / IA5208071 / 2985
1991 DICHLOROMETHANE MR 8 SDWIS / IA5208071 / 2964
1991 CHLOROBENZENE MR 8 SDWIS / IA5208071 / 2989
1991 Tetrachloroethylene MR 8 SDWIS / IA5208071 / 2987
1991 Xylenes, Total MR 8 SDWIS / IA5208071 / 2955
1991 1,2-Dichloropropane MR 8 SDWIS / IA5208071 / 2983
1991 Coliform (TCR) MCL 3 SDWIS / IA5208071 / 3100

How Coralville Muni Water System Compares

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

Metric Coralville Muni Water System Iowa avg Federal benchmark
Total violations 198 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 22,318 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 Coralville Muni Water System water safe to drink? ▼
Coralville Muni Water System (PWS ID: IA5208071) has 198 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 22,318 people using Groundwater sources.
How many people does Coralville Muni Water System serve? ▼
Coralville Muni Water System serves 22,318 people in Coralville, Iowa. It is a Local-owned system using Groundwater water sources with 6,500 service connections.
What type of violations does Coralville Muni Water System have? ▼
Coralville Muni Water System has 198 total violations: 3 health-based violations (MCL exceedances or treatment failures), 104 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Coralville Muni Water System water? ▼
No. Coralville Muni Water System was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Coralville Muni Water System use? ▼
Coralville Muni Water System 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.