Dalapon is an herbicide used to control weeds. It can enter drinking water through agricultural runoff. Long-term exposure may harm kidneys and liver.

Dalapon, introduced in the 1950s, is a widely used herbicide for controlling grasses in various settings, including crops and along roadsides. It can enter water supplies through agricultural runoff or leaching into groundwater. The EPA has set a maximum contaminant level of 200 parts per billion in drinking water. Dalapon typically biodegrades in soil and water over time. Water treatment plants use activated carbon filtration to remove it from drinking water supplies.