Drinking water / IA
PFAS in Iowa drinking water
152 Iowa public water systems tested under UCMR5. 32 detected at least one PFAS compound; 120 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.
| Water system | Serves | Highest results (ng/L) | Reading |
|---|---|---|---|
| DUBUQUE WATER WORKS IA3126052 | Dubuque | PFBA 13PFOA 5.1 * | above final limit |
| IOWA-AMERICAN WTR CO-DAVENPORT IA8222001 | Scott | PFBA 14.8PFOA 4.1 * | above final limit |
| MUSCATINE POWER & WATER IA7048001 | Muscatine | PFBA 60PFPeA 8.1PFOA 7.2 *PFBS 5.2 | above final limit |
| OSAGE MUNICIPAL WATER SUPPLY IA6663001 | Mitchell | PFHxS 4.3PFOS 4.2 * | above final limit |
| SIOUX CITY WATER SUPPLY IA9778054 | Woodbury | PFHxS 35PFHxA 33PFPeA 22PFBS 21 | above final limit |
| WAVERLY WATER DEPARTMENT IA0990085 | Bremer | PFHxS 15PFOA 7.2 *PFHxA 5.7PFBS 4.7 | above final limit |
| WEST BURLINGTON MUNI. WATER SUPPLY IA2985002 | Des Moines | PFBA 33PFPeA 12PFOA 5.3 *PFBS 3.6 | above final limit |
| ALBIA MUNICIPAL WATER WORKS IA6803010 | Monroe | PFBA 5.5 | detected |
| BONDURANT MUNI WATER SUPPLY IA7717032 | Polk | PFHxS 3.5 | detected |
| BURLINGTON MUNICIPAL WATERWORKS IA2909053 | Des Moines | PFBA 18PFPeA 6.2PFBS 6.2 | detected |
| CAMBRIDGE WATER SUPPLY IA8509069 | Story | PFBS 3.5 | detected |
| CARLISLE WATER SUPPLY IA9113071 | Warren | PFHxS 4.2 | detected |
| CARTER LAKE WATER DISTRICT IA7812079 | Pottawattamie | PFBA 5.3 | detected |
| CENTERVILLE MUNICIPAL WATERWORKS IA0407008 | Appanoose | PFBA 5.5 | detected |
| CHARITON MUNICIPAL WATER WORKS IA5903011 | Lucas | PFBA 13 | detected |
| CLARINDA WATER PLANT IA7329029 | Page | PFBA 8.2 | detected |
| CRESTON WATER SUPPLY IA8816089 | Union | PFBA 5.1 | detected |
| DECORAH WATER DEPARTMENT IA9630012 | Winneshiek | PFBS 7 | detected |
| GARDEN GROVE WATER SUPPLY IA2725073 | Decatur | PFBA 10 | detected |
| HIAWATHA WATER DEPT IA5735045 | Linn | PFBA 5.4PFHxS 3.7PFBS 3.4 | detected |
| IOWA LAKES REGIONAL WATER - LAKES AREA IA3060001 | Palo Alto | PFBA 5 | detected |
| IOWA-AMERICAN WTR CO-CLINTON DISTRICT IA2326048 | Clinton | PFBA 647.9PFPeA 18.1PFBS 11.7PFMPA 10.4 | detected |
| KEOKUK MUNICIPAL WATER WORKS IA5640019 | Lee | PFBA 11PFBS 6.3 | detected |
| OKOBOJI WATER SUPPLY IA3060091 | Dickinson | PFBA 9.2 | detected |
| OSCEOLA WATER WORKS IA2038038 | Clarke | PFBA 9.3 | detected |
| RATHBUN REG WATER ASSN (FT MADISON) IA0400901 | Lee | PFBA 12 | detected |
| RATHBUN REG WTR ASSN (BURLINGTON) IA0400902 | Des Moines +1 | PFBA 32PFPeA 13 | detected |
| SIRWA #3 (OSCEOLA) IA2038701 | Clarke | PFBA 7.3 | detected |
| SPIRIT LAKE WATERWORKS IA3070078 | Dickinson | PFBA 5.6 | detected |
| URBAN BLUFFS - NORTH IA7820701 | Pottawattamie | PFPeA 4.5PFBS 3.7PFHxA 3.5 | detected |
| WAPELLO RURAL WATER ASSOC. IA9000742 | Jefferson +3 | PFBA 5 | detected |
| WATERLOO WATER WORKS IA0790074 | Black Hawk | PFHxS 13PFPeA 4.8PFBS 3.2PFHxA 3.1 | detected |
* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.
Systems with no PFAS detected
120 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- ADEL MUNICIPAL WATER WORKS
- ALGONA MUNICIPAL UTILITIES
- ALTOONA WATER SUPPLY
- AMES WATER TREATMENT PLANT
- ANAMOSA MUNICIPAL WATER SUPPLY
- ANITA MUNICIPAL UTILITIES
- ANKENY, CITY OF
- ASBURY MUNICIPAL WATER SYSTEM
- ATLANTIC MUNICIPAL UTILITIES
- BANCROFT WATER SUPPLY
- BELLE PLAINE WATER DEPT
- BOONE WATER WORKS
- CAMANCHE WATER SUPPLY
- CARROLL MUNICIPAL WATER SUPPLY
- CEDAR FALLS MUNICIPAL WATER UTILITIES
- CEDAR RAPIDS WATER DEPARTMENT
- CHARLES CITY WATER SUPPLY
- CHEROKEE WATER SUPPLY - PLANT 1
- CLARKSVILLE WATER SUPPLY
- CLEAR LAKE WATER DEPARTMENT
- CLERMONT WATER SUPPLY
- CLIVE WATER DEPARTMENT
- CORALVILLE MUNI WATER SYSTEM
- COUNCIL BLUFFS WATER WORKS
- CRESCO WATERWORKS
- DE WITT WATER SUPPLY
- DENISON WATER SUPPLY
- DES MOINES WATER WORKS
- DYERSVILLE MUNICIPAL WATER CO
- EAGLE GROVE WATER SUPPLY
- ELDRIDGE WATER SUPPLY
- EMMETSBURG MUNICIPAL WATER DEPARTMENT
- ESTHERVILLE WATER TREATMENT PLANT
- EVANSDALE WATER WORKS
- FAIRFIELD WATER SUPPLY
- FOREST CITY WATER SUPPLY
- FORT DODGE WATER SUPPLY
- FT MADISON MUNI WATER WORKS
- GLENWOOD MUNICIPAL UTILITIES
- GRIMES WATER SUPPLY
- GRINNELL WATER DEPARTMENT
- HAMPTON MUNI WATER WORKS
- HARLAN MUNICIPAL UTILITIES
- HUMBOLDT MUNICIPAL WATER DEPT
- HUXLEY WATERWORKS DEPT
- IA REGIONAL UTILITIES ASSOC (WAVERLY)
- INDEPENDENCE WATER DEPT
- INDIANOLA WATER SUPPLY
- IOWA CITY MHP LLC
- IOWA CITY WATER DEPARTMENT
- IOWA FALLS WATER DEPARTMENT
- IOWA LAKES REGIONAL WATER
- IOWA PREMIUM LLC
- ISU
- JEFFERSON WATER DEPARTMENT
- JOHNSTON MUNICIPAL WATER SUPPLY
- KNOXVILLE WATER WORKS
- LEMARS WATER DEPARTMENT
- LYON-SIOUX RWS-BIG SIOUX
- MAHASKA RURAL WATER SYSTEM, INC.
- MANCHESTER WATER SUPPLY
- MAQUOKETA MUNICIPAL WATER
- MARION CO. RURAL WATER DISTRICT
- MARION MUNICIPAL WATER DEPT
- MARSHALLTOWN WATER WORKS
- MASON CITY WATER DEPARTMENT
- MELCHER-DALLAS WATER SUPPLY
- MONTICELLO WATER SUPPLY
- MOUNT PLEASANT MUNICIPAL UTILITIES
- MOUNT VERNON WATER SUPPLY
- NEVADA WATER SUPPLY
- NEW HAMPTON WATER SUPPLY
- NEWTON WATER SUPPLY
- NORTH LIBERTY WATER SUPPLY
- NORWALK WATER SUPPLY
- OELWEIN MUNICIPAL WATER WORKS
- ONAWA MUNICIPAL WATER PLANT
- ORANGE CITY MUNICIPAL WATER DEPARTMENT
- OSCEOLA RURAL WATER SYSTEM-NORTH
- OSKALOOSA MUNICIPAL WATER DEPT
- OTTUMWA WATER WORKS
- PELLA WATER WORKS DEPARTMENT
- PERRY MUNICIPAL WATER WORKS
- POLK CITY WATER SUPPLY
- PORTSMOUTH WATER SUPPLY
- POWESHIEK WATER ASSOCIATION
- RATHBUN REGIONAL WATER ASSN (RATHBUN)
- RED OAK WATER SUPPLY
- REGIONAL WATER
- RIVERVIEW SUBDIVISION
- ROCK VALLEY WATER SUPPLY
- RURAL WATER SYSTEM #1
- SERGEANT BLUFF WATER SUPPLY
- SHELDON WATER DEPARTMENT
- SHENANDOAH WATER DEPT
- SIOUX CENTER MUNICIPAL WATER DEPARTMENT
- SIRWA #2 (CRESTON)
- SOUTHEAST POLK RWD
- SOUTHERN SIOUX COUNTY RURAL WATER
- SPENCER MUNICIPAL WATER UTILITY
- STORM LAKE WATER TREATMENT PLANT
- STORY CITY WATER DEPT
- UNIVERSITY WATER SYSTEM
- URBANDALE WATER UTILITY
- VINTON MUNICIPAL WATER DEPT
- WARREN WATER DISTRICT
- WASHINGTON WATER DEPARTMENT
- WAUKEE WATER SUPPLY
- WAUKON WATER DEPARTMENT
- WEBSTER CITY WATER SUPPLY
- WEST CENTRAL RWA - NISH SYSTEM
- WEST CENTRAL RWA-BOYER SYSTEM
- WEST DES MOINES WATER WORKS
- WEST LIBERTY WATER UTILITY
- WINTERSET MUNICIPAL WATERWORKS
- WORTH CO INTERCHANGE 214 WATER SUPPLY
- XENIA RWD (BOONE)
- XENIA RWD (DES MOINES)
- XENIA RWD (NORTH)
- XENIA RWD (WOODWARD)
A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options