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Storm Water - Municipal Permits

The Los Angeles Water Board regulates discharges from medium and large municipal separate storm sewer systems (MS4s) through the Los Angeles County, Long Beach, and Ventura County MS4 Permits. These permits are issued under the National Pollutant Discharge Elimination System (NPDES) Program

No. Posted Date Comment Due Date
    Permittee
    Document
 Associated Permit
    Staff
    Notice
No. Posted Date Comment Due Date
    Permittee
    Document
 Associated Permit
    Staff
    Notice
1027 02/23/2024 03/25/2024 City of Whittier Alternative Onsite
Flow-based BMPs
  • Approval Letter
    		•  Regional MS4 Permit Susana Vargas Public Notice
    1026 11/30/2023   All MS4 Permittees Clarification Letter for Non-Stormwater Discharges from BMPs Regional MS4 Permit Jessica Pearson The format of this letter has been changed to comply with Water Board web-posting requirements.
    If you wish to receive a copy of the original signed letter, please contact staff for the document.
    1025 09/29/2023 10/30/2023 City of South El Monte Alternative Onsite
    Flow-based BMPs
  • Approval Letter
    		•  Regional MS4 Permit Susana Vargas Public Notice
    1024 04/25/2023 05/24/2023 City of Diamond Bar Alternative Onsite
    Flow-based BMPs
  • Approval Letter
    		•  Regional MS4 Permit Susana Vargas Public Notice
    1023 01/31/2023 03/02/2023 City of Whittier Alternative Onsite
    Flow-based BMPs
  • Approval Letter
    		•  Regional MS4 Permit Susana Vargas Public Notice
    1022 04/19/2022 05/19/2022 City of Norwalk Alternative Onsite
    Flow-based BMPS
  • Contact staff for
           Approval Letter
    		•  Regional MS4 Permit Susana Vargas Public Notice
    1021 02/02/2022 03/07/2022 City of Rolling Hills Addendum to the Palos Verdes Peninsula WMP to include the City of Rolling Hills (See public notice for document access) Regional MS4 Permit Rebecca Christmann Public Notice
    1020 01/18/2022 02/17/2022 City of Palos Verdes Estates Request for Compliance with SMB Debris TMDL through Scientifically Based Alternative Compliance Approach (Contact staff for Documents) Regional MS4 Permit Angineh Shahnazarian Link
    1019 11/08/2021 12/08/2021 Lower Los Angeles River Group
    • Notice of Opportunity for Public Comment on Request for Modification to the Lower Los Angeles River Watershed Management Program
    • Lower Los Angeles River Interim Metals TMDL Time Extension Request
    		 Regional MS4 Permit Alireza Rahmani Contact staff for documents
    1018 11/08/2021 12/08/2021 Lower San Gabriel River Group
    • Notice of Opportunity for Public Comment on Request for Modification to the Lower San Gabriel River Watershed Management Program
    • Lower San Gabriel River Interim Metals TMDL Time Extension Request
    		 Regional MS4 Permit Alireza Rahmani Contact staff for documents
    1017 09/24/2021 10/25/2021 City of El Segundo Regional MS4 Permit Susana Vargas Link
    1016 08/02/2021 09/02/2021 City of Irwindale LA County MS4 Permit Susana Vargas Contact staff for document
    1015 05/18/2021 06/18/2021 City of Commerce
    • Alternative Biofiltration Specification
    • Contact staff for Approval Letter
    		 LA County MS4 Permit Susana Vargas Link
    1014 05/18/2021 06/18/2021 City of Vernon
    • Alternative Biofiltration Specification
    • Contact staff for Approval Letter
    		 LA County MS4 Permit Susana Vargas Link
    1013

    04/13/2021

    		 05/13/2021 Upper Los Angeles River Group ULAR CIMP Modification Request LA County MS4 Permit Angineh Shahnazarian Contact staff for document
    1012

    04/06/2021

    		 05/06/2021 City of Pomona LA County MS4 Permit Susana Vargas
    1011

    10/28/2020

    		 11/30/2020 Upper Santa Clara River Group USCR EWMP Modification Request LA County MS4 Permit Erum Razzak Contact staff for document and notice
    1010

    12/30/2019

    		 01/30/2020 City of Commerce LA County MS4 Permit Susana Vargas
    1009

    09/30/2019

    		 10/30/2019 County of Los Angeles LA County MS4 Permit Susana Vargas
    1008

    09/12/2019

    		 10/14/2019 City of Compton LA County MS4 Permit Susana Vargas
    1007

    08/19/2019

    		 09/19/2019 City of Covina LA County MS4 Permit Susana Vargas
    1006

    06/20/2019

    		 07/22/2019 County of Los Angeles LA County MS4 Permit Ivar Ridgeway
    1005

    06/07/2019

    		 07/08/2019 City of Industry LA County MS4 Permit Ivar Ridgeway
    1004

    05/21/2019

    		 06/21/2019 City of Pomona LA County MS4 Permit Ivar Ridgeway
    1003

    04/05/2019

    		 05/06/2019 City of Rolling Hills LA County MS4 Permit Ivar Ridgeway
    1002

    03/27/2019

    		 04/26/2019 City of Manhattan Beach LA County MS4 Permit Ivar Ridgeway
    1002 01/31/2019 03/04/2019 Cities of Pasadena, Alhambra, Montebello, Monterey Park, Rosemead, San Gabriel, San Marino, South El Monte, South Pasadena, Temple City; County of Los Angeles LA County MS4 Permit Ivar Ridgeway
    1001 01/29/2019 02/28/2019 Rio Hondo-San Gabriel River Water Quality Group LA County MS4 Permit Chris Lopez
    1000 01/24/2019 02/25/2019 Beach Cities Watershed Management Group LA County MS4 Permit Ivar Ridgeway
    0999 01/23/2019 02/22/2019 Upper San Gabriel River Watershed Management Group LA County MS4 Permit Ivar Ridgeway
    0998 01/18/2019 02/18/2019 Palos Verdes Peninsula Watershed Management Group LA County MS4 Permit Rebecca Christmann
    0997 01/18/2019 02/18/2019 North Santa Monica Bay Coastal Watershed Management Group LA County MS4 Permit Rebecca Christmann
    0996 01/07/2019 02/07/2019 Ballona Creek Watershed Management Group LA County MS4 Permit Chris Lopez
    0995 01/07/2019 02/07/2019 Ballona Creek Watershed Management Group LA County MS4 Permit Chris Lopez
    0994 01/07/2019 2/7/2019 Ballona Creek Watershed Management Group LA County MS4 Permit Chris Lopez
    0993 01/07/2019 2/7/2019 Dominguez Channel Watershed Management Group LA County MS4 Permit Chris Lopez
    0992 01/07/2019 2/7/2019 Santa Monica Bay Jurisdictional Group 2 and 3 Watershed Management Group LA County MS4 Permit Chris Lopez
    0991 01/07/2019 2/7/2019 Upper Los Angeles River Watershed Management Group LA County MS4 Permit Chris Lopez
    0990 01/07/2019 2/7/2019 City of Pomona LA County MS4 Permit Ivar Ridgeway
    0989 12/13/2018 1/14/2019 City of Los Angeles, City of Pasadena, County of Los Angeles LA County MS4 Permit
      Chris Lopez
    0988 12/13/2018 1/14/2019 City of Industry   LA County MS4 Permit
    0987 8/10/2018 9/10/2018 City of La Mirada LA County MS4 Permit
      Chris Lopez
    0986 8/6/2018 9/5/2018 Beach Cities Watershed Management Group LA County MS4 Permit
    0985 7/30/2018 8/29/2018 North Santa Monica Bay Coastal Watershed Management Group LA County MS4 Permit
      Rebecca Christmann
    0984 6/15/2018 7/16/2018 Various LA County MS4 Permittees, City of Long Beach LA County MS4 Permit
      Chris Lopez
    0983 6/15/2018 7/16/2018 City of Alhambra LA County MS4 Permit
    0982 6/15/2018 7/16/2018 City of Carson LA County MS4 Permit
    0981 5/25/2018 6/25/2018 LA County MS4 Permittees, City of Long Beach LA County MS4 Permit,
    Long Beach MS4 Permit 
    0980 5/23/2018 6/22/2018 Rio Hondo-San Gabriel River Water Quality Group LA County MS4 Permit
    0979 5/14/2018 6/13/2018 Santa Monica Bay Watershed Jurisdictions 2 & 3 Watershed Management Group LA County MS4 Permit

    Written comments will be accepted through the Comment Due Date. Please email comments to the Staff contact and losangeles@waterboards.ca.gov. For more information please see the corresponding Notice.


    Contacts

    Program Supervisor
    Ivar Ridgeway
    (213) 620-2150
    Senior Environmental Scientist (Supervisor)