State Hub
Iowa Water Quality
498
Utilities in database
2.9M
Residents served
0
With open violations
146
PFAS monitored
Quick Answer
Iowa public drinking water is served by 498 EPA-tracked water systems, providing service to approximately 2.9 million residents through public utilities. No open health-based violations are currently recorded across tracked systems in the EPA federal database. 146 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 35% of IA residents use private wells, which fall outside federal utility compliance monitoring.
No open health-based violations are currently recorded in the EPA SDWIS database for Iowa's tracked water systems. Always verify with your utility's Consumer Confidence Report for annual test results.
Drinking Water in Iowa
Iowa has 498 community water systems serving approximately 2.9 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, arsenic. 35% of Iowa residents rely on private wells. DNR holds primary enforcement authority under the Safe Drinking Water Act.
Safest Large Utilities
Iowa systems with no open health violations serving 10,000+ residents.
Utilities in Iowa
51–75 of 498Keokuk Municipal Water Works
IA5640019 · 9,900 served
Fairfield Water Supply
IA5131033 · 9,821 served
Mahaska Rural Water System, Inc.
IA6273901 · 9,818 served
Grinnell Water Department
IA7930008 · 9,564 served
Bondurant Muni Water Supply
IA7717032 · 9,393 served
Denison Water Supply
IA2424027 · 9,381 served
Mount Pleasant Municipal Utilities
IA4453016 · 9,274 served
Iowa Lakes Regional Water - Osgood
IA3060001 · 9,021 served
Knoxville Water Works
IA6342036 · 8,400 served
Rathbun Reg Wtr Assn (burlington)
IA0400902 · 8,375 served
Sioux Center Municipal Water Department
IA8486053 · 8,231 served
Perry Municipal Water Works
IA2561036 · 7,836 served
Webster City Water Supply
IA4063094 · 7,825 served
Clear Lake Water Department
IA1716076 · 7,687 served
Decorah Water Department
IA9630012 · 7,615 served
Southeast Polk Rwd
IA7774701 · 7,565 served
Creston Water Supply
IA8816089 · 7,536 served
Charles City Water Supply
IA3405012 · 7,446 served
Washington Water Department
IA9271068 · 7,362 served
Atlantic Municipal Utilities
IA1509074 · 7,252 served
Hiawatha Water Dept
IA5735045 · 7,183 served
Osceola Rural Water System-north
IA7227701 · 7,002 served
Nevada Water Supply
IA8562044 · 6,925 served
Iowa Lakes Regional Water
IA2100701 · 6,755 served
Eldridge Water Supply
IA8230008 · 6,726 served
Key Contaminant Concerns in Iowa
These contaminants appear most frequently in Iowa utility records or pose elevated risk in this region based on EPA data.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
EPA limit: 80 µg/L (TTHMs) / 60 µg/L (HAA5)
Arsenic
Arsenic (As) occurs naturally in rock and soil, dissolving into groundwater through natural weathering processes. Inorganic arsenic — the form found in drinking water — is a known human carcinogen. The western United States has particularly arsenic-rich geological formations, but elevated levels have been found in 48 states. Arsenic is tasteless and odorless.
EPA limit: 10 ppb
City Water Reports in Iowa
Tap water quality pages for Iowa cities — violations, PFAS records, utility profiles, and official source links.
Independent Water Testing
Find a certified lab in Iowa
Utility compliance records show what water systems report to the EPA. An independent test from a certified laboratory confirms what's actually in your tap water. Iowa labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in Iowa
Keokuk Municipal Water Works
Violation history, PFAS records, and official source links
Fairfield Water Supply
Violation history, PFAS records, and official source links
Mahaska Rural Water System, Inc.
Violation history, PFAS records, and official source links
PFAS monitoring records — Iowa
146 water systems in Iowa with EPA UCMR 5 records
Lead in Iowa drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in Iowa drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in Iowa
Labs certified for PFAS (EPA 533/537.1), lead, and bacteria testing
Water treatment options
Reverse osmosis, activated carbon, and filtration guides with cost ranges
Data sources and methodology
How WaterUtilityReport.com sources and validates official EPA data
Common Questions About Iowa Drinking Water
Does Iowa drinking water have PFAS?
146 Iowa water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which Iowa water utilities have open violations?
Browse Iowa utility compliance records and violation history
How do I test my water in Iowa?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from IA tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do Iowa PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is Iowa water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
Iowa Water FAQs
Data sources: Utility compliance and violation data from EPA SDWIS (Safe Drinking Water Information System). PFAS monitoring records from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule 5, 2023–2025). Contaminant data from EPA and ATSDR public references. This page summarizes public records — it is not a compliance determination. Methodology →
Last updated: 2026-04-22