In this week's water and wastewater news, polluted waters near the Olympic venue trigger a police investigation, a St. Louis plant goes back online after severe flood damage and Flint water quality shows improvement.

In this week's water and wastewater news, Texas reports a fatal chemical explosion, Missouri treatment plants come back online after flooding, and Des Moines sets denitrification records

Iowa lawsuit requiring rural drainage districts to obtain nitrate discharge permits could have nationwide implications for utilities

In this week's water and wastewater news, an operator dies at a Detroit plant, a Washington biosolids court case ends and Des Moines Water fights high nitrate levels.