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PFAS in drinking water: Iowa

EPA UCMR 5 results for 152 public water systems. 32 had at least one PFAS detected; 7 had a highest single PFOA or PFOS result above 4.0 ppt.

UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.

Water system	Serves	PFOA max (ppt)	PFOS max (ppt)	PFAS detected
Adel Municipal Water Works IA2503003	Adel	ND	ND	0
Albia Municipal Water Works IA6803010	Albia	ND	ND	1
Algona Municipal Utilities IA5502015	Algona	ND	ND	0
Altoona Water Supply IA7707030	Altoona	ND	ND	0
Ames Water Treatment Plant IA8503039	Ames	ND	ND	0
Anamosa Municipal Water Supply IA5307048	Anamosa	ND	ND	0
Anita Municipal Utilities IA1503053	Anita	ND	ND	0
Ankeny, City Of IA7709053	Ankeny	ND	ND	0
Asbury Municipal Water System IA3102001	Asbury	ND	ND	0
Atlantic Municipal Utilities IA1509074	Atlantic	ND	ND	0
Bancroft Water Supply IA5507085	Bancroft	ND	ND	0
Belle Plaine Water Dept IA0610099	Belle Plaine	ND	ND	0
Bondurant Muni Water Supply IA7717032	Bondurant	ND	ND	1
Boone Water Works IA0819033	Boone	ND	ND	0
Burlington Municipal Waterworks IA2909053	Burlington	ND	ND	3
Camanche Water Supply IA2322066	Camanche	ND	ND	0
Cambridge Water Supply IA8509069	Cambridge	ND	ND	1
Carlisle Water Supply IA9113071	Carlisle	ND	ND	1
Carroll Municipal Water Supply IA1415072	Carroll	ND	ND	0
Carter Lake Water District IA7812079	Carter Lake	ND	ND	1
Cedar Falls Municipal Water Utilities IA0709084	Cedar Falls	ND	ND	0
Cedar Rapids Water Department IA5715093	Cedar Rapids	ND	ND	0
Centerville Municipal Waterworks IA0407008	Centerville	ND	ND	1
Chariton Municipal Water Works IA5903011	Chariton	ND	ND	1
Charles City Water Supply IA3405012	Charles City	ND	ND	0
Cherokee Water Supply - Plant 1 IA1811020	Cherokee	ND	ND	0
Clarinda Water Plant IA7329029	Clarinda	ND	ND	1
Clarksville Water Supply IA1228038	Clarksville	ND	ND	0
Clear Lake Water Department IA1716076	Clear Lake	ND	ND	0
Clermont Water Supply IA3317047	Clermont	ND	ND	0
Clive Water Department IA7720051	Clive	ND	ND	0
Coralville Muni Water System IA5208071	Coralville	ND	ND	0
Council Bluffs Water Works IA7820080	Council Bluffs	ND	ND	0
Cresco Waterworks IA4515087	Cresco	ND	ND	0
Creston Water Supply IA8816089	Creston	ND	ND	1
De Witt Water Supply IA2330036	De Witt	ND	ND	0
Decorah Water Department IA9630012	Decorah	ND	ND	1
Denison Water Supply IA2424027	Denison	ND	ND	0
Des Moines Water Works IA7727031	Des Moines	ND	ND	0
Dubuque Water Works IA3126052	Dubuque	5.1	ND	2
Dyersville Municipal Water Co IA3130091	Dyersville	ND	ND	0
Eagle Grove Water Supply IA9926096	Eagle Grove	ND	ND	0
Eldridge Water Supply IA8230008	Eldridge	ND	ND	0
Emmetsburg Municipal Water Department IA7428021	Emmetsburg	ND	ND	0
Estherville Water Treatment Plant IA3218024	Estherville	ND	ND	0
Evansdale Water Works IA0723027	Evansdale	ND	ND	0
Fairfield Water Supply IA5131033	Fairfield	ND	ND	0
Forest City Water Supply IA9525047	Forest City	ND	ND	0
Fort Dodge Water Supply IA9433050	Fort Dodge	ND	ND	0
Ft Madison Muni Water Works IA5625062	Fort Madison	ND	ND	0
Garden Grove Water Supply IA2725073	Garden Grove	ND	ND	1
Glenwood Municipal Utilities IA6525090	Glenwood	ND	ND	0
Grimes Water Supply IA7736011	Grimes	ND	ND	0
Grinnell Water Department IA7930008	Grinnell	ND	ND	0
Hampton Muni Water Works IA3544024	Hampton	ND	ND	0
Harlan Municipal Utilities IA8335029	Harlan	ND	ND	0
Hiawatha Water Dept IA5735045	Hiawatha	ND	ND	3
Humboldt Municipal Water Dept IA4641064	Humboldt	ND	ND	0
Huxley Waterworks Dept IA8538066	Huxley	ND	ND	0
Ia Regional Utilities Assoc (Waverly) IA0990701	Waverly	ND	ND	0
Independence Water Dept IA1037070	Independence	ND	ND	0
Indianola Water Supply IA9133075	Indianola	ND	ND	0
Iowa City MHP LLC IA5200601	Iowa City	ND	ND	0
Iowa City Water Department IA5225079	Iowa City	ND	ND	0
Iowa Falls Water Department IA4260097	Iowa Falls	ND	ND	0
Iowa Lakes Regional Water IA2100701	Spencer	ND	ND	0
Iowa Lakes Regional Water - Lakes Area IA3060001	Graettinger	ND	ND	1
Iowa Premium LLC IA8670101	Tama	ND	ND	0
Iowa-American WTR Co-Clinton District IA2326048	Clinton	ND	ND	5
Iowa-American WTR Co-Davenport IA8222001	Davenport	4.1	ND	2
Isu IA8503528	Ames	ND	ND	0
Jefferson Water Department IA3742004	Jefferson	ND	ND	0
Johnston Municipal Water Supply IA7740011	Johnston	ND	ND	0
Keokuk Municipal Water Works IA5640019	Keokuk	ND	ND	2
Knoxville Water Works IA6342036	Knoxville	ND	ND	0
Lemars Water Department IA7540174	Le Mars	ND	ND	0
Lyon-Sioux RWS-Big Sioux IA6000755	Rock Rapids	ND	ND	0
Mahaska Rural Water System, Inc. IA6273901	Oskaloosa	ND	ND	0
Manchester Water Supply IA2839021	Manchester	ND	ND	0
Maquoketa Municipal Water IA4950029	Maquoketa	ND	ND	0
Marion Co. Rural Water District IA6342711	Knoxville	ND	ND	0
Marion Municipal Water Dept IA5751035	Marion	ND	ND	0
Marshalltown Water Works IA6469042	Marshalltown	ND	ND	0
Mason City Water Department IA1750048	Mason City	ND	ND	0
Melcher-Dallas Water Supply IA6300099	Melcher-Dallas	ND	ND	0
Monticello Water Supply IA5343098	Monticello	ND	ND	0
Mount Pleasant Municipal Utilities IA4453016	Mount Pleasant	ND	ND	0
Mount Vernon Water Supply IA5758021	Mount Vernon	ND	ND	0
Muscatine Power & Water IA7048001	Muscatine	7.2	4.5	7
Nevada Water Supply IA8562044	Nevada	ND	ND	0
New Hampton Water Supply IA1970051	New Hampton	ND	ND	0
Newton Water Supply IA5059064	Newton	ND	ND	0
North Liberty Water Supply IA5252072	North Liberty	ND	ND	0
Norwalk Water Supply IA9164078	Norwalk	ND	ND	0
Oelwein Municipal Water Works IA3353088	Oelwein	ND	ND	0
Okoboji Water Supply IA3060091	Okoboji	ND	ND	1
Onawa Municipal Water Plant IA6739095	Onawa	ND	ND	0
Orange City Municipal Water Department IA8474097	Orange City	ND	ND	0
Osage Municipal Water Supply IA6663001	Osage	ND	4.2	2
Osceola Rural Water System-North IA7227701	May City	ND	ND	0
Osceola Water Works IA2038038	Osceola	ND	ND	1
Oskaloosa Municipal Water Dept IA6273005	Oskaloosa	ND	ND	0
Ottumwa Water Works IA9083012	Ottumwa	ND	ND	0
Pella Water Works Department IA6368033	Pella	ND	ND	0
Perry Municipal Water Works IA2561036	Perry	ND	ND	0
Polk City Water Supply IA7770050	Polk City	ND	ND	0
Portsmouth Water Supply IA8365052	Portsmouth	ND	ND	0
Poweshiek Water Association IA8670701	Brooklyn	ND	ND	0
Rathbun Reg WTR Assn (Burlington) IA0400902	Burlington	ND	ND	2
Rathbun Reg Water Assn (Ft Madison) IA0400901	Fort Madison	ND	ND	1
Rathbun Regional Water Assn (Rathbun) IA0400900	Centerville	ND	ND	0
Red Oak Water Supply IA6950075	Red Oak	ND	ND	0
Regional Water IA8300184	Avoca	ND	ND	0
Riverview Subdivision IA7038301	Montpelier	ND	ND	0
Rock Valley Water Supply IA8482096	Rock Valley	ND	ND	0
Rural Water System #1 IA8400722	Hospers	ND	ND	0
Sergeant Bluff Water Supply IA9774033	Sergeant Bluff	ND	ND	0
Sheldon Water Department IA7170040	Sheldon	ND	ND	0
Shenandoah Water Dept IA7383045	Shenandoah	ND	ND	0
Sioux Center Municipal Water Department IA8486053	Sioux Center	ND	ND	0
Sioux City Water Supply IA9778054	Sioux City	6	4.3	9
Sirwa #2 (Creston) IA8080701	Creston	ND	ND	0
Sirwa #3 (Osceola) IA2038701	Osceola	ND	ND	1
Southeast Polk RWD IA7774701	Altoona	ND	ND	0
Southern Sioux County Rural Water IA8400733	Ireton	ND	ND	0
Spencer Municipal Water Utility IA2171071	Spencer	ND	ND	0
Spirit Lake Waterworks IA3070078	Spirit Lake	ND	ND	1
Storm Lake Water Treatment Plant IA1178097	Storm Lake	ND	ND	0
Story City Water Dept IA8584000	Story City	ND	ND	0
University Water System IA5225101	Iowa City	ND	ND	0
Urban Bluffs - North IA7820701	Council Bluffs	ND	ND	3
Urbandale Water Utility IA7780042	Urbandale	ND	ND	0
Vinton Municipal Water Dept IA0688053	Vinton	ND	ND	0
Wapello Rural Water Assoc. IA9000742	Ottumwa	ND	ND	1
Warren Water District IA9133701	Indianola	ND	ND	0
Washington Water Department IA9271068	Washington	ND	ND	0
Waterloo Water Works IA0790074	Waterloo	ND	ND	4
Waukee Water Supply IA2573080	Waukee	ND	ND	0
Waukon Water Department IA0398082	Waukon	ND	ND	0
Waverly Water Department IA0990085	Waverly	7.2	ND	6
Webster City Water Supply IA4063094	Webster City	ND	ND	0
West Burlington Muni. Water Supply IA2985002	West Burlington	5.3	ND	5
West Central RWA - Nish System IA1400902	Manning	ND	ND	0
West Central RWA-Boyer System IA1400903	Wall Lake	ND	ND	0
West Des Moines Water Works IA7785007	West Des Moines	ND	ND	0
West Liberty Water Utility IA7073010	West Liberty	ND	ND	0
Winterset Municipal Waterworks IA6171029	Winterset	ND	ND	0
Worth Co Interchange 214 Water Supply IA9855202	Northwood	ND	ND	0
Xenia RWD (Boone) IA0844006	Luther	ND	ND	0
Xenia RWD (Des Moines) IA2573701	Minburn	ND	ND	0
Xenia RWD (North) IA9425701	Stratford	ND	ND	0
Xenia RWD (Woodward) IA2576705	Woodward	ND	ND	0

ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.

Source: EPA UCMR 5 final occurrence data (EPA page last updated 2026-08-28; samples collected January 2023 – December 2025) ↗.

PFAS disclaimer: PFAS results are copied from EPA's UCMR 5 dataset and describe samples taken at a public water system's entry points between 2023 and 2025, not water at any specific address. Levels may have changed since sampling (for example, after new treatment). “Not detected” means below EPA's UCMR 5 minimum reporting level, not zero. This is not a compliance determination or a water test. Contact your water utility for current information.