Drinking Water Systems in JOHNSTON, Iowa
2 water systems are reported for this city, with a combined service population of 26,066. The systems have 1 EPA violation record in the five-year period ending June 30, 2026.
Water Systems Serving JOHNSTON
JOHNSTON MUNICIPAL WATER SUPPLY
24,897 served3 historical records
A
CAMP DODGE WATER SUPPLY
1,169 served21 historical records1 recent
B
EPA Contaminant Categories in Historical Violation Records
Total Trihalomethanes (TTHMs)3 records
Coliform (TCR)1 record
Haloacetic Acids (HAA5)1 record
Nitrate1 record
Benzene1 record
o-Dichlorobenzene1 record
Tetrachloroethylene (PCE)1 record
1,2-Dichloroethane1 record
1,1-Dichloroethylene1 record
Tetrachloroethylene1 record
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.