Irrigated Lands Regulatory Program - Regulatory Information

Adopted Waste Discharge Requirements (WDRs or Orders)

The Central Valley Regional Water Board has adopted waste discharge requirements (WDRs) for discharges from irrigated lands to protect both surface water and groundwater throughout the Central Valley. The Irrigated Lands Regulatory Program (ILRP) regulates such discharges located within the jurisdiction of the Central Valley Water Board, which extends from the Oregon border south to the northernmost tip of Los Angeles County (Region 5). The adopted waste discharge requirements are the product of four years of dialogue among a variety of interested parties, as well as public input received at numerous stakeholder and Central Valley Water Board meetings.

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