Irrigated Lands Regulatory Program (ILRP)

The ILRP was initiated to prevent agricultural runoff from impairing surface waters, and later included the addition of groundwater regulations. Runoff from irrigated lands can contain pollutants, such as pesticides, fertilizers, salts, and sediment, which can harm aquatic life or make water unusable for drinking water or agricultural uses. Waste discharge requirements (WDRs) address irrigated agricultural discharges to protect water quality.