Overall, the tests showed the nitrate problem has become notably worse in the past decade, even as Gov. Tina Kotek and other state officials in recent years have said they want to act on the problem.

Researchers have proposed using polymer membranes modified with copper, zinc, and chromium metal ions for water purification. These polymers were used for the first time in water purification via ...

The U.S. Environmental Protection Agency recently added segments of five rivers near large Iowa cities including Cedar Rapids to the state's impaired waters list for nitrate — over the repeated ...

High nitrate intake caused nitrite to accumulate ... effect of nitrite in mucus might compensate for reduced bicarbonate ion delivery when gastric secretion is quiescent (i.e. during sleep or ...