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Watershed Management Programs

The Los Angeles County MS4 Permit allows Permittees the flexibility to develop Watershed Management Programs (WMPs) or Enhanced Watershed Programs (EWMPs) to implement the requirements of the Permit on a watershed scale through customized strategies, control measures, and best management practices (BMPs). Participation in a Watershed Management Program is voluntary and allows a Permittee to address the highest watershed priorities, including complying with the requirements of Part V.A. (Receiving Water Limitations), Part VI.E (Total Maximum Daily Load Provisions) and Attachments L through R, by customizing the control measures in Parts III.A.4 (Prohibitions - Non-Storm Water Discharges) and VI.D (Minimum Control Measures). All documents associated with the the development and implementation of the 31 Watershed Management Programs are available below. If you have any questions or comments regarding the watershed management programs please contact Ivar Ridgeway, Senior Environmental Scientist of the Storm Water Permitting Unit at (213) 620-2150.

Group Name Cities/Permittees Involved Selected Program Lead/ Coordinator Watershed Management Area 1 Watershed Management Area 2
Group Name Cities/Permittees Involved Selected Program Lead/ Coordinator Watershed Management Area 1 Watershed Management Area 2
Upper Santa Clara River Watershed LA County, LACFCD, Santa Clarita EWMP Santa Clarita Santa Clara River  
Upper Los Angeles River Watershed Alhambra, Burbank, Calabasas, Glendale, Hidden Hills, La Canada Flintridge, Los Angeles, Montebello, Monterey Park, Pasadena, Rosemead, San Fernando, San Gabriel, San Marino, South El Monte, South Pasadena, Temple City, LA County, LAFCD EWMP Los Angeles Los Angeles River  
Los Angeles River Upper Reach 2 Sub-watershed Bell, Bell Gardens, Commerce, Cudahy, Huntington Park, Maywood, Vernon, LACFCD WMP Huntington Park Los Angeles River  
Lower Los Angeles River Watershed Downey, Long Beach, Lakewood, Lynwood, Paramount, Pico Rivera, Signal Hill, South Gate, LACFCD WMP Signal Hill Los Angeles River  
Rio Hondo/San Gabriel River Water Quality Group Arcadia, Azusa, Bradbury, Duarte, Monrovia, County, LACFCD, Sierra Madre EWMP Sierra Madre Los Angeles River San Gabriel River
Upper San Gabriel River Baldwin Park, Covina, Glendora, Industry, La Puente, West Covina, LACFCD, LA County EWMP LA County San Gabriel River  
East San Gabriel Valley Watershed Management Area Claremont, La Verne, Pomona, San Dimas WMP La Verne San Gabriel River  
Lower San Gabriel River Artesia, Bellflower, Cerritos, Diamond Bar, Downey, Hawaiian Gardens, La Mirada, Lakewood, Long Beach, Norwalk, Pico Rivera, Santa Fe Springs, Whittier, LACFCD WMP Norwalk San Gabriel River  
Los Cerritos Channel Watershed Bellflower, Cerritos, Downey, Lakewood, Long Beach, Paramount, Signal Hill, LACFCD WMP Long Beach Los Cerritos Channel and Alamitos Bay  
Malibu Creek Watershed Agoura Hills, Calabasas, Hidden Hills, Westlake Village, LA County, LACFCD EWMP Calabasas Santa Monica Bay  
Marina del Rey Culver City, Los Angeles, LACFCD, LA County EWMP LA County Santa Monica Bay  
North Santa Monica Bay Coastal Watersheds LA County, LACFCD, Malibu EWMP Malibu Santa Monica Bay  
Santa Monica Bay Watershed Jurisdictions 2 & 3 Los Angeles, El Segundo, Santa Monica, LA County, LACFCD EWMP Los Angeles Santa Monica Bay  
Santa Monica Bay Watershed Jurisdiction 7 Los Angeles, LACFCD WMP Los Angeles Santa Monica Bay  
Beach Cities Watershed Management Group Hermosa Beach, Manhattan Beach, Redondo Beach, Torrance, LACFCD EWMP Redondo Beach Santa Monica Bay Dominguez Channel
Palos Verdes Peninsula EWMP Agencies Palos Verdes Estates, Rancho Palos Verdes, Rolling Hills Estates, LA County, LACFCD EWMP Rancho Palos Verdes Santa Monica Bay Dominguez Channel
Ballona Creek Beverly Hills, Culver City, Inglewood, Los Angeles, Santa Monica, West Hollywood, County, LACFCD EWMP Los Angeles Santa Monica Bay  
Dominguez Channel Watershed Management Area Group Carson, El Segundo, Hawthorne, Inglewood, Lawndale, Lomita, Los Angeles, LA County, LACFCD EWMP Los Angeles Dominguez Channel  
Alamitos Bay/Los Cerritos Channel Group LA County, LACFCD WMP LA County Los Cerritos Channel and Alamitos Bay  
Carson See Dominguez Channel Watershed Management Area Group EWMP Los Angeles Dominguez Channel  
Compton Compton N/A Compton Los Angeles River Dominguez Channel
El Monte El Monte Individual WMP El Monte Los Angeles River San Gabriel River
Gardena Gardena N/A Gardena Dominguez Channel  
Irwindale Irwindale N/A Irwindale Los Angeles River San Gabriel River
La Habra Heights La Habra Heights Individual WMP La Habra Heights San Gabriel River  
Lawndale See Dominguez Channel Watershed Management Area Group EWMP Los Angeles Dominguez Channel  
Lomita See Dominguez Channel Watershed Management Area Group EWMP Los Angeles Dominguez Channel  
San Fernando See Upper Los Angeles River Watershed EWMP Los Angeles Los Angeles River  
South El Monte See Upper Los Angeles River Watershed EWMP Los Angeles Los Angeles River San Gabriel River
Walnut Walnut Individual WMP Walnut San Gabriel River  
West Covina See Upper San Gabriel River EWMP LA County San Gabriel River  
Rolling Hills Rolling Hills N/A Rolling Hills Santa Monica Bay Dominguez Channel

Contacts

Program Supervisor
Ridgeway, Ivar
Ivar.Ridgeway@waterboards.ca.gov
(213) 620-2150
Senior Environmental Scientist