Agricultural drainage tile, a system used by farmers to increase crop yields, is a main contributor to excess nutrients in waterways. Agricultural drainage tile, ...

About 98% of drainage tile in the nation is located in watersheds with excess nitrate and phosphorus levels. Tile changes the natural movement of water, serving as a conduit for pollution that is ...

An Iowa water quality expert and local farmer address the high nitrate concerns as levels in the Raccoon and Des Moines ...

The results showed 3 ppm of nitrates in that tile water. 10 ppm is considered the acceptable level. They then tested the water in the creek and it measured over 10 ppm.