Iowa Water Quality Ratings

TapWaterSafety has rated 12 public water systems in Iowa, serving a combined 1,303,644 residents. The statewide average grade is D.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
D
61/100
Total utilities rated 12
Population served 1,303,644
Most recent test 2024

Top water quality concerns in Iowa

  • Haloacetic acids (HAA9) significantly above health guideline
  • Total trihalomethanes (TTHMs) significantly above health guideline
  • PFAS contamination
  • Total PFOS and PFOA significantly above health guideline
  • Perfluorohexane sulfonate (PFHXS) significantly above health guideline

Cities in Iowa

Browse tap water quality reports by city. Click any city to see its grade, what's in the water, and recommended filters.

AMES
D 55,177
ANKENY
D 76,207
CEDAR RAPIDS
D 142,364
COUNCIL BLUFFS
D 64,447
DAVENPORT
F 147,720
DES MOINES
D 246,055
DUBUQUE
F 59,667
Des Moines
D 214,000
IOWA CITY
D 68,753
SIOUX CITY
F 85,791
WATERLOO
D 69,504
WEST DES MOINES
F 73,959

Grade distribution

A
0 (0%)
B
0 (0%)
C
6 (50%)
D
4 (33%)
F
2 (17%)

All rated utilities in Iowa

Sorted by score, highest first. Click any utility to see the full grade card.

Rank Utility City Population Score Grade
#1 AMES WATER TREATMENT PLANT AMES 55,177 69 C
#2 CEDAR RAPIDS WATER DEPARTMENT CEDAR RAPIDS 142,364 68 C
#3 IOWA CITY WATER DEPARTMENT IOWA CITY 68,753 65 C
#4 ANKENY, CITY OF ANKENY 76,207 65 C
#5 DES MOINES WATER WORKS DES MOINES 246,055 65 C
#6 COUNCIL BLUFFS WATER WORKS COUNCIL BLUFFS 64,447 65 C
#7 WATERLOO WATER WORKS WATERLOO 69,504 63 D
#8 Des Moines Municipal Water System Des Moines 214,000 63 D
#9 WEST DES MOINES WATER WORKS WEST DES MOINES 73,959 55 D
#10 IOWA-AMERICAN WTR CO-DAVENPORT DAVENPORT 147,720 55 D
#11 DUBUQUE WATER WORKS DUBUQUE 59,667 54 F
#12 SIOUX CITY WATER SUPPLY SIOUX CITY 85,791 50 F