About the Central Basin
The Central Basin consists of a series of underground aquifers beneath much of South Los Angeles County. It extends south to Orange County and west to the Newport-Inglewood Fault.
The Water Repleishment District recharges groundwater reserves in the Central Basin through spreading grounds on the San Gabriel River and utilizes injection facilities in the Alamitos Gap to block seawater intrusion.
Central Basin Rights Holders AY 2025-26
| Party | Rights | OYC | Drought CO | Flex | No Flex | Stored | Produced |
|---|---|---|---|---|---|---|---|
| Cerritos, City of | 4680.03 | 1040.91 | 1038.22 | 513.00 | 3950.00 | 4761.82 | 806.28 |
| Compton, City of | 5780.00 | 2682.61 | 59.64 | 0.00 | 1500.00 | 0 | 655.62 |
| South Gate, City of | 11183.00 | 2236.60 | 447.21 | 0.00 | -1000.00 | 7500 | 747.17 |
| Vernon, City of | 7539.00 | 3323.40 | 521.17 | -1000.00 | -1500.00 | 0 | 386.06 |
| Omega OU1/OU3 LLC | 0.50 | -8.07 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Boeing Company | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Boeing Company (Former Compton Site) | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Defense Logistic Agency Energy | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Demenno/Kerdoon | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Water Replenishment District | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Artesia Cemetery District | 12.00 | 20.00 | 0 | -12.00 | 0.00 | 0 | 0.00 |
| Bellflower Home Garden Water Company | 306.00 | 20.00 | 0 | -306.00 | 0.00 | 0 | 0.00 |
| Buell, Mary Dolores | 1.00 | 0.00 | 0 | -1.00 | 0.00 | 0 | 0.00 |
| Lakewood, City of Water Department | 9432.00 | 1486.40 | 1500 | -3000.00 | -700.00 | 6289.19 | 642.11 |
| Montebello, City of | 386.50 | 20.00 | 0 | -386.50 | 0.00 | 0 | 0.00 |
| PABCO Building Products, LLC | 500.00 | 0.95 | 0 | -500.00 | 0.00 | 0 | 0.00 |
| Liberty Utilities Corporation | 1159.30 | 1981.19 | 0 | 1806.00 | 0.00 | 0 | 711.17 |
| San Gabriel Valley Water Company | 2569.42 | 0.00 | 0 | 386.50 | 0.00 | 4148.36 | 308.95 |
| Whittier, City of | 895.00 | 1529.39 | 0 | 5500.00 | 0.00 | 1790 | 593.82 |
| ABC Unified School District | 298.00 | 178.80 | 25.21 | 0.00 | -250.00 | 0 | 5.72 |
| American Textile Maintenance Company | 65.00 | 36.53 | 35 | 0.00 | 0.00 | 0 | 7.40 |
| Artesia, City of | 24.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.30 |
| Bell Gardens, City of | 1914.00 | 1148.40 | 149.88 | 0.00 | 0.00 | 0 | 0.00 |
| Bellflower-Somerset Mutual Water Company | 4412.88 | 1546.95 | 0 | 0.00 | 0.00 | 1000 | 450.92 |
| California American Water Company | 2875.00 | 1725.00 | 35 | 0.00 | 0.00 | 0 | 180.76 |
| California, State of (Caltrans) | 50.00 | -24328.73 | 0 | 0.00 | 0.00 | 0 | 2.22 |
| California Water Service Company (East LA) | 11774.00 | 711.71 | 3037.76 | -1250.00 | 0.00 | 0 | 1168.93 |
| California Water Service Company (Dominguez) | 6480.00 | 3138.00 | 0 | -1250.00 | 0.00 | 0 | 110.70 |
| Coast Packing Company | 530.00 | 318.00 | 34.21 | 0.00 | 0.00 | 0 | 11.43 |
| Commerce, City of | 5081.00 | 3048.60 | 1778.35 | 0.00 | 0.00 | 0 | 139.52 |
| Darling-Delaware Company, Inc | 117.00 | 70.20 | 40.95 | 0.00 | 0.00 | 0 | 0.00 |
| Downey, City of | 16553.62 | 7932.17 | 910.06 | 0.00 | -2000.00 | 2000 | 1305.18 |
| El Rancho Unified School District | 55.00 | 33.00 | 30.49 | 0.00 | 0.00 | 0 | 0.00 |
| Golden State Water Company | 16439.20 | 7371.50 | 47.21 | 0.00 | 0.00 | 0 | 1524.92 |
| Huntington Park, City of | 3853.00 | 2311.80 | 681.83 | 0.00 | 0.00 | 0 | 263.74 |
| La Habra Heights County Water District | 2668.00 | 1600.80 | 0 | 0.00 | 0.00 | 0 | 279.42 |
| Little Lake Cemetery District | 14.00 | 20.00 | 13.22 | 0.00 | 0.00 | 0 | 0.00 |
| Long Beach, City of | 32692.00 | 0.00 | 4.29 | 0.00 | 0.00 | 32479.24 | 2851.13 |
| Los Angeles, City of Dept of Water and Power | 17236.00 | 3447.20 | 5250 | 0.00 | 0.00 | 22905.89 | 1.09 |
| Los Angeles County Rancho Los Amigos | 490.00 | 294.00 | 144.36 | 0.00 | 0.00 | 0 | 21.34 |
| Lunday-Thagard Oil Company | 212.00 | 0.00 | 8.31 | 0.00 | 0.00 | 0 | 0.00 |
| Lynwood, City of | 5337.00 | 3202.20 | 31.61 | 0.00 | 0.00 | 0 | 453.80 |
| Lynwood Park Mutual Water Company | 222.00 | 133.20 | 0 | 0.00 | 0.00 | 0 | 3.99 |
| Maywood Mutual Water Company No. 1 | 741.00 | 444.60 | 9.66 | 0.00 | 0.00 | 0 | 0.17 |
| Maywood Mutual Water Company No. 2 | 912.00 | 507.10 | 19.35 | 0.00 | 0.00 | 0 | 92.18 |
| Maywood Mutual Water Company No. 3 | 1407.00 | 524.54 | 72.64 | 0.00 | 0.00 | 100 | 129.31 |
| Montebello Land and Water Company | 1901.15 | 588.88 | 247.28 | 587.00 | 0.00 | 0 | 275.63 |
| Newark Group, Inc., The | 157.00 | 19.26 | 0 | 0.00 | 0.00 | 0 | 3.70 |
| Norwalk, City of | 2273.00 | 1363.80 | 161.86 | 0.00 | 0.00 | 0 | 38.08 |
| Orchard Dale Water District | 1254.00 | 568.34 | 69.52 | 0.00 | 0.00 | 0 | 204.67 |
| Paradise Memorial Park | 16.00 | 20.00 | 0.95 | 0.00 | 0.00 | 0 | 1.32 |
| Paramount, City of | 5883.00 | 3529.80 | 1290.58 | 0.00 | 0.00 | 0 | 244.10 |
| Paramount Unified School District | 46.00 | 27.60 | 0 | 0.00 | 0.00 | 0 | 1.02 |
| Pico Water District | 3624.00 | 2174.40 | 284.26 | 0.00 | 0.00 | 0 | 260.42 |
| Pico Rivera, City of | 5579.00 | 3047.40 | 566.26 | -500.00 | 0.00 | 0 | 405.76 |
| Rockview Dairies, Inc. | 101.00 | 25.24 | 0 | 0.00 | 0.00 | 0 | 13.15 |
| Roman Catholic Archbishop of Los Angeles | 347.00 | 208.20 | 90.61 | 0.00 | 0.00 | 0 | 41.62 |
| Santa Fe Springs, City of | 4035.78 | 2421.47 | 1283.02 | 0.00 | 0.00 | 0 | 133.88 |
| Signal Hill, City of | 2022.00 | 1213.20 | 707.7 | 0.00 | 0.00 | 0 | 101.53 |
| South Montebello Irrigation District | 1268.00 | 475.27 | 0 | 0.00 | 500.00 | 0 | 164.86 |
| Southern California Edison Company | 670.00 | 402.00 | 234.5 | 0.00 | 0.00 | 0 | 0.00 |
| Suburban Water Systems | 4195.00 | 1335.78 | 35 | 0.00 | 0.00 | 0 | 175.25 |
| Tract 180 Mutual Water Company | 2137.00 | 1072.20 | 63.96 | -150.00 | 0.00 | 0 | 109.97 |
| Tract 349 Mutual Water Company | 423.00 | 80.83 | 5.28 | 0.00 | 0.00 | 0 | 54.70 |
| Virginia Country Club | 274.00 | 164.40 | 0 | 0.00 | 0.00 | 0 | 51.33 |
| Walnut Park Mutual Water Company | 1009.00 | 231.80 | 204.64 | 150.00 | 0.00 | 957.91 | 92.75 |
| Whittier Union High School District | 100.00 | 10.00 | 24.12 | 0.00 | 0.00 | 50 | 4.14 |
| Yamamoto, George and Alice Acct. | 14.00 | 20.00 | 13.82 | 0.00 | 0.00 | 0 | 0.00 |
| Rowland Water District | 1.00 | 6.17 | 0 | -1.00 | 0.00 | 0 | 0.00 |
| HMB Bandini, LLC | 1.00 | 4.92 | 0 | 0.00 | 0.00 | 0 | 0.01 |
| Puente Basin Water Agency | 965.00 | 100.00 | 127.75 | -465.00 | -500.00 | 479 | 0.00 |
| California Domestic Water Company | 87.00 | 20.00 | 0 | -87.00 | 0.00 | 0 | 0.00 |
| Hoke, Barbara | 1.50 | 0.00 | 0 | -1.50 | 0.00 | 0 | 0.00 |
| Rosing, Nancy | 1.50 | 0.00 | 0 | -1.50 | 0.00 | 0 | 0.00 |
| Baker, Mary | 28.00 | 0.00 | 0 | -28.00 | 0.00 | 0 | 0.00 |
| Julee Margulies Metz, Jon Schwartz and Darrin Margulies Trust | 3.00 | 3.00 | 0 | -3.00 | 0.00 | 0 | 0.00 |
| Arco Metals Co./ American Brass | 0.00 | 10.00 | 24.46 | 0.00 | 0.00 | 0 | 0.00 |
| Gordon, Robert E. | 4.00 | 20.00 | 4.8 | 0.00 | 0.00 | 0 | 0.00 |
| Lincoln Memorial Park Inc | 34.00 | 20.40 | 60.24 | 0.00 | 0.00 | 0 | 0.00 |
| Scantlebury, Robert P. | 4.00 | 20.00 | 21.49 | 0.00 | 0.00 | 0 | 0.00 |
| Chang, I-Hsin and Associates | 1.00 | 20.00 | 3.84 | 0.00 | 0.00 | 0 | 0.00 |
| Crandell, F.J. | 1.00 | 20.00 | 1.75 | 0.00 | 0.00 | 0 | 0.00 |
| Rosales, Elvira C | 3.00 | 20.00 | 5 | 0.00 | 0.00 | 0 | 0.00 |
| Statewide Stations, Inc. | 1.00 | 20.00 | 15 | 0.00 | 0.00 | 0 | 0.00 |
| LA Brickyard, LLC | 9.00 | 20.00 | 9.75 | 0.00 | 0.00 | 0 | 0.00 |
| OU2 Environmental Remediation Trust | 0.00 | 20.00 | 12.95 | 0.00 | 0.00 | 0 | 0.00 |
| Bellflower, City of | 680.00 | 408.00 | 483 | 0.00 | 0.00 | 0 | 0.00 |
| Compton Unified School District | 38.00 | 22.80 | 35 | 0.00 | 0.00 | 0 | 0.00 |
| Flesch, Elizabeth Et Al | 14.00 | 20.00 | 14 | 0.00 | 0.00 | 0 | 0.00 |
| Ford Motor Company | 4.50 | 20.00 | 4.5 | 0.00 | 0.00 | 0 | 0.00 |
| Inglewood Park Cemetery | 317.00 | 190.20 | 35 | 0.00 | 0.00 | 0 | 0.00 |
| Lussman, Paul H. Jr., Et Al | 7.00 | 20.00 | 6.76 | 0.00 | 0.00 | 0 | 0.00 |
| Northrop Grumman/Omega Chemical | 4.50 | 20.00 | 20 | 0.00 | 0.00 | 0 | 0.00 |
| Norwalk-La Mirada Unified School District | 378.00 | 226.80 | 97.3 | 0.00 | 0.00 | 0 | 0.00 |
| O N K Farms | 8.00 | 20.00 | 8 | 0.00 | 0.00 | 0 | 0.00 |
| St. John Bosco School | 42.00 | 25.20 | 12.67 | 0.00 | 0.00 | 0 | 0.00 |
| Los Angeles County Public Works - Sativa Water System | 0.00 | 20.00 | 162.59 | 0.00 | 0.00 | 0 | 0.00 |
| WEMS, Inc., A California Corp. | 8.00 | 20.00 | 8 | 0.00 | 0.00 | 0 | 0.00 |
| Wolfsberger, Helen/Joseph, Chris | 2.00 | 20.00 | 2 | 0.00 | 0.00 | 0 | 0.00 |
| Harada Investments, LLC | 6.00 | 20.00 | 6 | 0.00 | 0.00 | 0 | 0.00 |
| New England Mutual Life Insurance Company | 2.00 | 20.00 | 2 | 0.00 | 0.00 | 0 | 0.00 |
| Oltmans Construction Company | 3.00 | 20.00 | 3 | 0.00 | 0.00 | 0 | 0.00 |
| Patrician Associates Inc/Majestic Realty Company | 12.00 | 20.00 | 12 | 0.00 | 0.00 | 0 | 0.00 |
| Taurek, Mary | 0.00 | 0.00 | 1 | 0.00 | 0.00 | 0 | 0.00 |
| Equilon Enterprises, LLC | 6.00 | 20.00 | 6 | 0.00 | 0.00 | 0 | 0.00 |
| Tesoro Refining | 54.00 | 32.40 | 35 | 0.00 | 0.00 | 0 | 0.00 |
| EcoGas, Inc. | 0.00 | 20.00 | 2 | 0.00 | 0.00 | 0 | 0.00 |
| Vernon Environmental Response Trust | 0.00 | 20.00 | 35 | 0.00 | 0.00 | 0 | 0.00 |
| Baker Commodities Inc. | 60.00 | 36.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Bellflower Unified School District | 89.00 | 53.40 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Boy Scouts of America | 1.00 | -5.80 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Central Basin Municipal Water District | 4.65 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Cerritos Community College District | 147.00 | 88.20 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Pico Boys Baseball, Inc. | 13.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| September Properties LLC | 0.00 | -0.21 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Tucker, William M. | 0.00 | -0.02 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Automobile Club of Southern California | 6.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Angeles Abbey Memorial Park, Inc. | 4.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Dolan, J.E. P.A. | 2.00 | 4.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Hathaway, Merrie F | 1.86 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Hathaway, Richard F, Jr. | 4.07 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Mellano, G et al | 0.00 | -15.93 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Mitsuuchi, Mary F Trust | 11.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Petersburg, L.P. | 1.00 | 11.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Rippy, Francine | 4.07 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Vangrootheest, Ernest A | 10.00 | 10.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Footbridge 1 Trust | 3.75 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Corning Trust | 3.75 | 3.75 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Nancy Dee Keane Living Trust | 4.00 | 4.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Forestar (USA) Real Estate Group Inc. | 0.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Omega OU2, LLC. | 7.47 | 8.47 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Blakslee Trust | 33.00 | 20.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Aqua Capital Management LP | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Arzouman, Charles and Neuart | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Ashland Chemical Company | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Atkinson Brick Company | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Atlantic Richfield Co. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| CECC, LLC. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Chevron USA, Inc. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Emoto, John H | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Exide Technologies | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Farmers | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Frampton, Harvey | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Frampton, William H. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Graham, Hugh W or Marcia K, Trustees | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Hathaway, Jesse R | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Hathaway, Loline | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Hathaway, William A | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Hoke, Barbara and Rosing, Nancy | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Jones Company, The | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Kotake, Massao | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Margulies, Kathryn and Schwartz, Jon | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Martin, Mary | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Metro Water Systems, Inc. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Randall, Villis Family Trust | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Rocky Mountain Industries, Inc. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Rosing, L S Trust and P Schwartz | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| S&M Mellano 1036 PACIFIC LLC | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Simmons Survivors Trust | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Simmons, John George | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Simmons, Richard Bennett | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Tesoro Logistics Operations | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| TF Hidden Creeks, L.P. | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| United States Gypsum Company | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Zane Living Trust | 0.00 | 0.00 | 0 | 0.00 | 0.00 | 0 | 0.00 |
| Party | Rights | OYC | Drought CO | Flex | No Flex | Stored | Produced |
Groundwater Recharge
About the Central Basin
The Central Basin consists of a series of underground aquifers beneath much of South Los Angeles County. It extends south to Orange County and west to the Newport-Inglewood Fault.
The Water Repleishment District recharges groundwater reserves in the Central Basin through spreading grounds on the San Gabriel River and utilizes injection facilities in the Alamitos Gap to block seawater intrusion.
Map of the Central and West Coast Basins
