Water Quality Data

Drinking water supplied by Des Moines Water Works (DMWW) meets or surpasses the United States Environmental Protection Agency (EPA) and the State of Iowa water quality standards. The water supplied by DMWW is safe from the time it leaves the treatment facility, through the plumbing system and out of your tap. 

Immuno-compromised persons – such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, persons with HIV/AIDS or other immuno systems disorders – and elderly persons may want to discuss their drinking water concerns with their healthcare provider.

Des Moines Water Works Treated Water Quality Data by Treatment Plant
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Sample results displayed are the most recent samplings available


The EPA sets standards to define the limits of contaminants considered safe for drinking water. These levels are based on studies of the health effects associated with each contaminant and include a sufficient safety margin to ensure that the water meeting these standards is safe for nearly everyone to drink.

Safe drinking water, supplied by Des Moines Water Works (DMWW), meets or surpasses the EPA water quality standards. The water supplied by DMWW is safe from the time it leaves the treatment facility, through the plumbing system and out of your tap.

Immuno-compromised persons — such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, persons with HIV/AIDS or other immuno systems disorders — and elderly persons may want to discuss their drinking water concerns with their healthcare provider.

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