AMENDED IN ASSEMBLY APRIL 6, 2026
AMENDED IN ASSEMBLY MARCH 19, 2026
CALIFORNIA LEGISLATURE— 2025–2026 REGULAR SESSION
97
Introduced by Assembly Member Papan
February 19, 2026
An act to amend Section 1342 of add Section 13383.4 to the Water Code, relating to water.
Vote: majority Appropriation: no Fiscal committee: yes Local program: no
LEGISLATIVE COUNSEL’S DIGEST
Under existing law, the State Water Resources Control Board and the 9 California regional water quality control boards prescribe waste discharge requirements for the discharge of stormwater by municipalities and industries in accordance with the federal national pollutant discharge elimination system (NPDES) permit program, established by the federal Clean Water Act and the Porter-Cologne Water Quality Control Act. Under existing law, the state board and the 9 regional water quality control boards issue permits for the discharge of stormwater from municipal separate storm sewer systems (MS4s).
For purposes of issuing permits for the discharge of stormwater from MS4s, this bill define “commercial, industrial, or institutional site” or “CII site” as a privately owned parcel or contiguous parcels of land that are commercial, industrial, or institutional based on the appropriate county tax assessor land use codes, as specified.
This bill would require notice to be given by mail not less than 15 days before the date of a hearing for an unprotested application.
The people of the State of California do enact as follows:
SECTION 1.
Section 13383.4 is added to the Water Code, to read:
13383.4.
For purposes of issuing permits for the discharge of stormwater from municipal separate storm sewer systems (MS4s), “commercial, industrial, or institutional site” or “CII site” shall mean a privately owned parcel or contiguous parcels of land that are commercial, industrial, or institutional based on the appropriate county tax assessor land use codes. For parcels with mixed use commercial and residential land use codes, a “CII site” shall mean the commercial, institutional, or industrial portion of the mixed land use parcel. “CII site” shall not include residential facilities of any type, including those located within a parcel assigned the land use category of mixed use.
Section 1342 of the Water Code is amended to read:
1342.
If a hearing is held on an unprotested application, notice of hearing shall be given by mailing notice not less than 15 days before the date of hearing.