Consumer Confidence Report

The Consumer Confidence Report is an annual water quality report that helps water customers understand the quality and safety of tap water provided by Des Moines Water Works (DMWW). All of Johnston receives its water from the DMWW. The water quality report summarizes the results of Des Moines Water Works’ water monitoring program as required by the Environmental Protection Agency (EPA) during 2016. Many of the analyses are required by the Safe Drinking Water Act and other regulations; however, DMWW monitors for contaminants above and beyond the basic requirements. 
 
2017 Consumer Confidence Report