Home reverse osmosis systems are becoming more popular in central Iowa as nitrates affect public drinking water supplies.

High levels of nitrates in rivers plus a lawn watering ban have residents worried, but CIWW said it has no plans to implement a drinking water ban.

In some parts of these states, levels of nitrate in drinking water systems were higher than the EPA's 10 mg/L safety limit. What People Are Saying. Susan Richardson, ...

Nitrate levels in their water sources have been high due to upstream land-use practices where excess nutrients leave the soil and enter Iowa's water. The standard is 10 milligrams per liter.

For several weeks, nitrate levels in the rivers have been so high, treatment plants across central Iowa are having a hard time treating it including Des Moines Water Works. The agency treats an ...