Drinking water systems imperiled by failing infrastructure
![Drinking water systems imperiled by failing infrastructure](http://bloximages.chicago2.vip.townnews.com/democratherald.com/content/tncms/assets/v3/editorial/7/fa/7facb1a5-eb9b-5624-bf5f-f8f8af249775/5609f6bf538cc.image.jpg?resize=300%2C200)
This Wednesday, July 15, 2015 photo shows a control panel and tank in the Nitrate Removal Facility at the Des Moines Water Works plant in Des Moines, Iowa. The biggest challenge for the utilit…