Increasing use of nitrogen-based fertilizer over the last half-century is putting Americans' health at risk. Excess nitrate in drinking water increases the risk of cancer, birth defects and thyroid ...

The Raccoon River weaves past downtown Des Moines. One of the primary drinking water sources for the region, the river has high nitrate levels that have led to water restrictions for some 600,000 ...

Jul. 10—For nearly a month, hundreds of thousands of Iowans have not been allowed to water their lawns — even though there's no drought. Local authorities previously asked the public to refrain from ...

Biochar made from corn cobs can remove microplastics and ammonia from water, offering a low-cost, reusable filter made from ...