CA SB683

Requires regional water quality control boards to include flexibility for existing programs, implementation agreements, and funding mechanisms in municipal separate storm sewer system permits issued to regions rather than individual dischargers.

Mandates regional boards establish a methodology or mechanism in permits to determine whether projects should be regulated regionally or as locally specific issues requiring individual regulation.

Requires regional boards to meet and collaborate with permittees before or during the permit writing process for regional municipal separate storm sewer system permits.

Applies only to the extent permitted by federal Clean Water Act and NPDES permit program requirements.