Map: Please click here for a web app of LARIAC participant cities (with years of their LARIAC membership)
List: Last updated 4/22/2019
| LAR-IAC4 | LAR-IAC5 | |
| City of Arcadia | City of Agoura Hills | |
| City of Azusa | City of Arcadia | |
| City of Beverly Hills | City of Azusa | |
| City of Burbank | City of Beverly Hills | |
| City of Carson | City of Burbank | |
| City of Cerritos | City of Carson | |
| City of Claremont | City of Claremont | |
| City of Covina | City of Culver City | |
| City of Culver City | City of Downey | |
| City of Downey | City of El Segundo | |
| City of Duarte | City of Gardena | |
| City of El Monte | City of Glendale | |
| City of El Segundo | City of Hermosa Beach | |
| City of Gardena | City of Industry | |
| City of Glendale | City of Inglewood | |
| City of Hermosa Beach | City of La Canada Flintridge | |
| City of Industry | City of Lakewood | |
| City of Inglewood | City of Los Angeles | |
| City of La Canada Flintridge | City of Malibu | |
| City of Lakewood | City of Manhattan Beach | |
| City of Long Beach | City of Palos Verdes Estates | |
| City of Los Angeles | City of Pasadena | |
| City of Malibu | City of Rancho Palos Verdes | |
| City of Manhattan Beach | City of Redondo Beach | |
| City of Norwalk | City of San Dimas | |
| City of Pasadena | City of San Fernando | |
| City of Rancho Palos Verdes | City of Santa Clarita | |
| City of Redondo Beach | City of Santa Fe Springs | |
| City of San Dimas | City of Santa Monica | |
| City of Santa Clarita | City of Signal Hill | |
| City of Santa Monica | City of Temple City | |
| City of Signal Hill | City of Torrance | |
| City of Temple City | City of West Covina | |
| City of Torrance | City of West Hollywood | |
| City of West Hollywood | City of Westlake Village | |
| City of Westlake Village | City of Whittier | |
| City of Whittier | California State University Long Beach | |
| California State University Long Beach | California State Polytechnical University, Pomona | |
| California State Polytechnical University, Pomona | UCLA | |
| Claremont University Consortium | California Department of Transportation | |
| Loyola Marymount University | Catalina Island Conservancy | |
| Rio Hondo Community College | Los Angeles County Metropolitan Transit Authority | |
| Catalina Island Conservancy | Los Angeles County Sanitation Districts | |
| Los Angeles Air Force Base | Port of Long Beach | |
| Los Angeles County Metropolitan Transit Authority | Southern California Edison (Catalina Island) | |
| Los Angeles County Sanitation Districts | Santa Clarita Valley Water Agency | |
| Newhall Land and Farming | Water Replenishment District of Southern California | |
| US Geological Survey | ||
| Water Replenishment District of Southern California |