EnviroAtlas - Predicted drinking water nitrate violations by 12-Digit HUC for the Conterminous United States
This map displays predicted probability of a 12-digit Hydrologic Unit (HUC12) being at risk of violating the drinking water nitrate standard. Risk is defined as there being greater than a 50% chance of having a drinking water violation. Observed violations of the nitrate standard in public drinking water was used to …