| VAN DUZEN - HUMBOLDT CO. PARKS | EUREKA, CA | 551 | 2 | — |
| YOSEMITE LAKES COMMUNITY CHURCH | COARSEGOLD, CA | 551 | 46 | — |
| MEADOWS UNION ELEMENTARY SCHOOL | EL CENTRO, CA | 550 | 41 | Clean |
| EL TEJON MIDDLE SCHOOL | LEBEC, CA | 550 | 11 | — |
| HARBOR VIEW MUTUAL WATER COMPANY | KELSEYVILLE, CA | 550 | 73 | — |
| LANDALE MUTUAL WATER COMPANY | LANCASTER, CA | 550 | 8 | — |
| HUGHES-ELIZABETH LAKE UNIFIED SCHOOL DIS | LAKE HUGHES, CA | 550 | 5 | — |
| PACIFIC SCIENTIFIC ENERGETIC MATS. COMP. | HOLLISTER, CA | 550 | 11 | — |
| MISSION OAKS MOBILE HOME PARK | SAN JOSE, CA | 550 | 14 | — |
| DIERBERG/STAR LANE VINEYARD | SANTA YNEZ, CA | 550 | 0 | — |
| SAN VICENTE WATER COMPANY | SANTA BARBARA, CA | 550 | 48 | — |
| SANTA CRUZ COUNTY FAIRGROUNDS | WATSONVILLE, CA | 550 | 14 | — |
| VINEYARD RV PARK | VACAVILLE, CA | 550 | 3 | — |
| PATTERSON TRACT CSD | VISALIA, CA | 550 | 40 | Clean |
| RIO SCHOOL DIST/ RIO REAL SCHOOL | OXNARD, CA | 550 | 12 | — |
| CLAYTON PALMS WATER | CLAYTON, CA | 549 | 7 | — |
| SISKIYOU LAKE HIGHLANDS MWC | MT. SHASTA, CA | 549 | 5 | — |
| CALPELLA COUNTY WATER DISTRICT | UKIAH, CA | 548 | 11 | — |
| BITNEY SPRINGS CENTER WATER SYSTEM | NEVADA CITY, CA | 547 | 32 | — |
| KORBEL BROTHERS WINERY | GUERNEVILLE, CA | 546 | 8 | — |
| FULLER ACRES MUTUAL WATER COMPANY | LAMONT, CA | 545 | 23 | — |
| LLANO DEL RIO WATER COMPANY | LLANO, CA | 545 | 2 | — |
| GOLDEN STATE WATER COMPANY - LAKE MARIE | RANCHO CORDOVA, CA | 545 | 0 | — |
| CHIRIACO SUMMIT WATER DIST. | CHIRIACO SUMMIT, CA | 544 | 40 | — |
| DARR WATER CO | BORON, CA | 543 | 42 | — |
| RIO VISTA MOBILE HOME PARK | SACRAMENTO, CA | 543 | 14 | — |
| LOMA PRIETA JUSD-LOMA PRIETA SCHOOL | LOS GATOS, CA | 542 | 15 | — |
| LANARE COMMUNITY SERVICES DIST | COALINGA, CA | 540 | 119 | — |
| SHERWOOD MOBILE HOME PARK | LANCASTER, CA | 540 | 10 | — |
| RIVERVIEW MOBILE HOME ESTATES | SANTA CRUZ, CA | 540 | 32 | — |
| WOODLAND PARK MUTUAL WATER CO | ARROYO GRANDE, CA | 538 | 21 | — |
| WOODWARD RESERVOIR WATER SYSTEM | MODESTO, CA | 537 | 39 | — |
| GILROY USD-RUCKER SCHOOL | GILROY, CA | 536 | 9 | — |
| EL DORADO ID - OUTINGDALE | PLACERVILLE, CA | 535 | 7 | — |
| WSL - SURF RANCH | LEMOORE, CA | 535 | 0 | — |
| GABILAN WC | SALINAS, CA | 535 | 52 | — |
| SID - GIBSON CANYON | VACAVILLE, CA | 535 | 4 | — |
| COLUSA INDUSTRIAL PROPERTIES | COLUSA, CA | 533 | 5 | — |
| OCCIDENTAL COMMUNITY SERVICES DISTRICT | OCCIDENTAL, CA | 533 | 25 | — |
| MENF-FOUTS SPRINGS CG | WILLOWS, CA | 531 | 0 | — |
| PALMS RIVER RESORT | NEEDLES, CA | 531 | 9 | — |
| ALLENSWORTH CSD | EARLIMART, CA | 531 | 95 | — |
| UNITED PACIFIC #0251 | LONG BEACH, CA | 530 | 0 | — |
| WINDMILL RESORT | PARKER, CA | 530 | 28 | — |
| SWS LAND DEVELOPMENT INC | MADERA, CA | 529 | 90 | — |
| CSA 42 ORO GRANDE | SAN BERNARDINO, CA | 529 | 2 | — |
| CAZADERO WATER COMPANY, INC. (PUC) | FORESTVILLE, CA | 525 | 57 | — |
| CASTLEWOOD DOMESTIC WATER SYSTEM | PLEASANTON, CA | 524 | 6 | — |
| BRIDGEPORT PUD | BRIDGEPORT, CA | 524 | 189 | — |
| NORTH TAHOE PUD - CARNELIAN WOODS | TAHOE VISTA, CA | 524 | 4 | — |