In July 2003, the Central Valley Regional Water Quality Control Board (Regional Board) adopted a set of regulations pertaining to discharges of waste from irrigated agricultural lands and managed wetlands into waters of the State. These regulations, more generally referred to as the Irrigated Lands Regulatory Program (ILRP), provided an individual producer or managed wetland owner with three options to comply:

1.  Join a coalition group that will meet requirements of the ILRP. The original deadline to join a coalition was December 31, 2006; however, producers and managed wetland owners may still be eligible to join.

To join, please contact the Colusa Glenn Subwatershed Program for instructions regarding local coalition membership.

2.  File a Notice of Intent with the Regional Board to participate directly in the ILRP as an individual.

3.  Opt out of the ILRP and apply for a waste discharge requirement (WDR) directly with the Regional Board.

The Colusa Glenn Subwatershed Program encourages those subject to ILRP to strongly consider choosing option one.

Good News! On October 15, 2021, the California Regional Water Quality Control Board, Central Valley adopted a Resolution to exempt exclusively managed wetlands from the ILRP General Orders in the Sacramento and San Joaquin River Basins. Therefore, any managed wetland parcel(s) defined as:

Publicly or privately-owned wetlands that receive seasonal, semi-permanent, or permanent flooding to simulate natural processes that promote food production and habitat for the benefit of wetland-dependent species. Along with artificial flooding, other routine maintenance and management activities are typically required to maintain habitat, wildlife, and other ecological benefits.

NOT CONSIDERED MANAGED WETLANDS: irrigated agriculture and wetland operations rotated on the same land.