Iowa tap water quality
1,078 community water systems
5.7%
exceed lead action level
(61/1062 systems)
(61/1062 systems)
4.6%
PFOA/PFOS detected
(7/151 systems)
(7/151 systems)
Largest water systems
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that system.
| System | City | Population | Lead (p90) |
|---|---|---|---|
| DES MOINES WATER WORKS | DES MOINES | 246,055 | 0.0079 mg/L |
| IOWA-AMERICAN WTR CO-DAVENPORT | DAVENPORT | 147,720 | 0.0030 mg/L |
| CEDAR RAPIDS WATER DEPARTMENT | CEDAR RAPIDS | 142,364 | 0.0120 mg/L |
| SIOUX CITY WATER SUPPLY | SIOUX CITY | 85,791 | 0.0065 mg/L |
| ANKENY, CITY OF | ANKENY | 76,207 | 0.0176 mg/L |
| WEST DES MOINES WATER WORKS | WEST DES MOINES | 73,959 | 0.0044 mg/L |
| WATERLOO WATER WORKS | WATERLOO | 69,504 | 0.0072 mg/L |
| IOWA CITY WATER DEPARTMENT | IOWA CITY | 68,753 | 0.0129 mg/L |
| COUNCIL BLUFFS WATER WORKS | COUNCIL BLUFFS | 64,447 | 0.0030 mg/L |
| DUBUQUE WATER WORKS | DUBUQUE | 59,667 | 0.0148 mg/L |
| AMES WATER TREATMENT PLANT | AMES | 55,177 | 0.0056 mg/L |
| URBANDALE WATER UTILITY | URBANDALE | 45,605 | 0.0091 mg/L |
| ISU | AMES | 42,000 | 0.0056 mg/L |
| MARION MUNICIPAL WATER DEPT | MARION | 41,623 | 0.0077 mg/L |
| CEDAR FALLS MUNICIPAL WATER UTILITIES | CEDAR FALLS | 40,713 | 0.0057 mg/L |
| IA REGIONAL UTILITIES ASSOC (WAVERLY) | WAVERLY | 37,820 | 0.0271 mg/L |
| RATHBUN REGIONAL WATER ASSN (RATHBUN) | CENTERVILLE | 33,000 | 0.0260 mg/L |
| WAUKEE WATER SUPPLY | WAUKEE | 31,823 | 0.0202 mg/L |
| MARSHALLTOWN WATER WORKS | MARSHALLTOWN | 27,680 | 0.0046 mg/L |
| MASON CITY WATER DEPARTMENT | MASON CITY | 27,338 | 0.0093 mg/L |
| UNIVERSITY WATER SYSTEM | IOWA CITY | 26,684 | 0.0110 mg/L |
| BURLINGTON MUNICIPAL WATERWORKS | BURLINGTON | 26,015 | 0.0104 mg/L |
| FORT DODGE WATER SUPPLY | FORT DODGE | 25,874 | 0.0092 mg/L |
| OTTUMWA WATER WORKS | OTTUMWA | 25,529 | 0.0101 mg/L |
| MUSCATINE POWER & WATER | MUSCATINE | 25,516 | 0.0058 mg/L |
| JOHNSTON MUNICIPAL WATER SUPPLY | JOHNSTON | 24,897 | 0.0112 mg/L |
| IOWA-AMERICAN WTR CO-CLINTON DISTRICT | CLINTON | 24,769 | 0.0071 mg/L |
| NORTH LIBERTY WATER SUPPLY | NORTH LIBERTY | 23,276 | 0.0030 mg/L |
| CORALVILLE MUNI WATER SYSTEM | CORALVILLE | 22,318 | 0.0064 mg/L |
| SIRWA #2 (CRESTON) | CRESTON | 20,793 | 0.0084 mg/L |
| CLIVE WATER DEPARTMENT | CLIVE | 20,277 | 0.0124 mg/L |
| WARREN WATER DISTRICT | INDIANOLA | 20,095 | 0.0078 mg/L |
| ALTOONA WATER SUPPLY | ALTOONA | 19,565 | 0.0054 mg/L |
| GRIMES WATER SUPPLY | GRIMES | 17,809 | 0.0029 mg/L |
| WAPELLO RURAL WATER ASSOC. | OTTUMWA | 17,263 | 0.0016 mg/L |
| NEWTON WATER SUPPLY | NEWTON | 16,518 | 0.0019 mg/L |
| INDIANOLA WATER SUPPLY | INDIANOLA | 15,833 | 0.0000 mg/L |
| NORWALK WATER SUPPLY | NORWALK | 14,334 | 0.0082 mg/L |
| POWESHIEK WATER ASSOCIATION | BROOKLYN | 13,920 | 0.0087 mg/L |
| XENIA RWD (DES MOINES) | MINBURN | 12,860 | 0.0338 mg/L |
| OSKALOOSA MUNICIPAL WATER DEPT | OSKALOOSA | 12,808 | 0.0077 mg/L |
| BOONE WATER WORKS | BOONE | 12,704 | 0.0230 mg/L |
| RATHBUN REG WATER ASSN (FT MADISON) | FORT MADISON | 11,840 | 0.0086 mg/L |
| STORM LAKE WATER TREATMENT PLANT | STORM LAKE | 11,431 | 0.0053 mg/L |
| SPENCER MUNICIPAL WATER UTILITY | SPENCER | 11,325 | 0.0000 mg/L |
| FT MADISON MUNI WATER WORKS | FORT MADISON | 11,087 | 0.0178 mg/L |
| PELLA WATER WORKS DEPARTMENT | PELLA | 11,052 | 0.0110 mg/L |
| LEMARS WATER DEPARTMENT | LE MARS | 10,606 | 0.0071 mg/L |
| WAVERLY WATER DEPARTMENT | WAVERLY | 10,394 | 0.0132 mg/L |
| CARROLL MUNICIPAL WATER SUPPLY | CARROLL | 10,184 | 0.0246 mg/L |
| KEOKUK MUNICIPAL WATER WORKS | KEOKUK | 9,900 | 0.0191 mg/L |
| FAIRFIELD WATER SUPPLY | FAIRFIELD | 9,821 | 0.0037 mg/L |
| MAHASKA RURAL WATER SYSTEM, INC. | OSKALOOSA | 9,818 | 0.0010 mg/L |
| GRINNELL WATER DEPARTMENT | GRINNELL | 9,564 | 0.0110 mg/L |
| BONDURANT MUNI WATER SUPPLY | BONDURANT | 9,393 | 0.0231 mg/L |
| DENISON WATER SUPPLY | DENISON | 9,381 | 0.0074 mg/L |
| MOUNT PLEASANT MUNICIPAL UTILITIES | MOUNT PLEASANT | 9,274 | 0.0070 mg/L |
| IOWA LAKES REGIONAL WATER - OSGOOD | GRAETTINGER | 9,021 | 0.0030 mg/L |
| KNOXVILLE WATER WORKS | KNOXVILLE | 8,400 | 0.0089 mg/L |
| RATHBUN REG WTR ASSN (BURLINGTON) | BURLINGTON | 8,375 | 0.0108 mg/L |
| SIOUX CENTER MUNICIPAL WATER DEPARTMENT | SIOUX CENTER | 8,231 | 0.0090 mg/L |
| PERRY MUNICIPAL WATER WORKS | PERRY | 7,836 | 0.0052 mg/L |
| WEBSTER CITY WATER SUPPLY | WEBSTER CITY | 7,825 | 0.0040 mg/L |
| CLEAR LAKE WATER DEPARTMENT | CLEAR LAKE | 7,687 | 0.0089 mg/L |
| DECORAH WATER DEPARTMENT | DECORAH | 7,615 | 0.0117 mg/L |
| TIFFIN WATER SUPPLY | TIFFIN | 7,577 | 0.0068 mg/L |
| SOUTHEAST POLK RWD | ALTOONA | 7,565 | 0.0053 mg/L |
| CRESTON WATER SUPPLY | CRESTON | 7,536 | 0.0110 mg/L |
| CHARLES CITY WATER SUPPLY | CHARLES CITY | 7,446 | 0.0052 mg/L |
| WASHINGTON WATER DEPARTMENT | WASHINGTON | 7,362 | 0.0047 mg/L |
| ATLANTIC MUNICIPAL UTILITIES | ATLANTIC | 7,252 | 0.0035 mg/L |
| HIAWATHA WATER DEPT | HIAWATHA | 7,183 | 0.0124 mg/L |
| OSCEOLA RURAL WATER SYSTEM-NORTH | MAY CITY | 7,002 | 0.0065 mg/L |
| NEVADA WATER SUPPLY | NEVADA | 6,925 | 0.0076 mg/L |
| IOWA LAKES REGIONAL WATER | SPENCER | 6,755 | 0.0084 mg/L |
| ELDRIDGE WATER SUPPLY | ELDRIDGE | 6,726 | 0.0084 mg/L |
| POLK CITY WATER SUPPLY | POLK CITY | 6,533 | 0.0070 mg/L |
| ADEL MUNICIPAL WATER WORKS | ADEL | 6,461 | 0.0110 mg/L |
| ORANGE CITY MUNICIPAL WATER DEPARTMENT | ORANGE CITY | 6,267 | 0.0038 mg/L |
| SPIRIT LAKE WATERWORKS | SPIRIT LAKE | 6,167 | 0.0067 mg/L |
| MAQUOKETA MUNICIPAL WATER | MAQUOKETA | 6,128 | 0.0107 mg/L |
| XENIA RWD (NORTH) | STRATFORD | 6,122 | 0.0062 mg/L |
| INDEPENDENCE WATER DEPT | INDEPENDENCE | 6,064 | 0.0088 mg/L |
| ASBURY MUNICIPAL WATER SYSTEM | ASBURY | 5,943 | 0.0108 mg/L |
| OELWEIN MUNICIPAL WATER WORKS | OELWEIN | 5,920 | 0.0070 mg/L |
| ESTHERVILLE WATER TREATMENT PLANT | ESTHERVILLE | 5,904 | 0.0050 mg/L |
| MARION CO. RURAL WATER DISTRICT | KNOXVILLE | 5,687 | 0.0040 mg/L |
| RED OAK WATER SUPPLY | RED OAK | 5,596 | 0.0085 mg/L |
| DE WITT WATER SUPPLY | DE WITT | 5,514 | 0.0050 mg/L |
| SHELDON WATER DEPARTMENT | SHELDON | 5,512 | 0.0050 mg/L |
| OSCEOLA WATER WORKS | OSCEOLA | 5,503 | 0.0264 mg/L |
| ALGONA MUNICIPAL UTILITIES | ALGONA | 5,487 | 0.0314 mg/L |
| GLENWOOD MUNICIPAL UTILITIES | GLENWOOD | 5,449 | 0.0108 mg/L |
| WINTERSET MUNICIPAL WATERWORKS | WINTERSET | 5,428 | 0.0095 mg/L |
| SOUTHERN SIOUX COUNTY RURAL WATER | IRETON | 5,420 | 0.0096 mg/L |
| CENTERVILLE MUNICIPAL WATERWORKS | CENTERVILLE | 5,344 | 0.0094 mg/L |
| CHEROKEE WATER SUPPLY - PLANT 1 | CHEROKEE | 5,199 | 0.0087 mg/L |
| IOWA FALLS WATER DEPARTMENT | IOWA FALLS | 5,146 | 0.0120 mg/L |
| MANCHESTER WATER SUPPLY | MANCHESTER | 5,077 | 0.0084 mg/L |
| HARLAN MUNICIPAL UTILITIES | HARLAN | 5,067 | 0.0010 mg/L |