| SHAVER LAKE HEIGHTS MWC | CLOVIS, CA | 836 | 60 | — |
| CASTELLO DI AMOROSA | ST HELENA, CA | 833 | 13 | — |
| OASIS DATE GARDENS | THERMAL, CA | 832 | 67 | — |
| CAMANCHE SOUTH SHORE-EBMUD | VALLEY SPRINGS, CA | 828 | 12 | — |
| LOLETA C.S.D. | LOLETA, CA | 828 | 5 | — |
| MHC TT INC. (DBA PIO PICO) | JAMUL, CA | 828 | 18 | — |
| TUD-APPLE VALLEY ESTATES | SONORA, CA | 826 | 4 | — |
| DEL SUR SCHOOL/WESTSIDE UNION DISTRICT | QUARTZ HILL, CA | 825 | 6 | — |
| SACRAMENTO NAT. WILDLIFE REFUGE | WILLOWS, CA | 824 | 2 | — |
| SIERRA LAKES COUNTY WATER DIST | TRUCKEE, CA | 824 | 2 | — |
| RIO SCHOOL DIST/RIO DEL VALLE SCHOOL | OXNARD, CA | 820 | 15 | — |
| LIBERTY ELEMENTARY SCHOOL | TULARE, CA | 818 | 6 | — |
| ADVENTIST HEALTH - ST. HELENA HOSPITAL | ST. HELENA, CA | 817 | 7 | — |
| LACSD - RIMFOREST | LAKE ARROWHEAD, CA | 817 | 3 | — |
| WESTERN VALLEY MEAT COMPANY | FRESNO, CA | 815 | 55 | — |
| CENTRAL VALLEY MEAT CO INC | HANFORD, CA | 812 | 150 | — |
| APPLE VALLEY FOOTHILL CWD | APPLE VALLEY, CA | 811 | 13 | — |
| TRANQUILLITY IRRIGATION DISTRICT | TRANQUILLITY, CA | 807 | 96 | — |
| USFS-JACKSON LAKE V-4 | ARCADIA, CA | 805 | 17 | — |
| CANON MANOR WATER SYSTEM | SANTA ROSA, CA | 805 | 6 | — |
| RESORT IMPROVEMENT DISTRICT #1 | WHITETHORN, CA | 803 | 7 | — |
| CSP-J.P. BURNS PARK | MONTEREY, CA | 802 | 4 | — |
| CHICO GRANGE #486 | CHICO, CA | 800 | 8 | — |
| 1000 TRAILS / SOLEDAD CANYON PRESERVE | ACTON, CA | 800 | 10 | — |
| DELAWARE NORTH PARKS SERVICES AT TENAYA | FISHCAMP, CA | 800 | 24 | — |
| JOHN LATORACCA CORRECTIONAL FACILITY | MERCED, CA | 800 | 11 | — |
| SOUTH YUBA RIVER STATE PARK | TAHOMA, CA | 800 | 3 | — |
| PLUMAS-EUREKA S.P. | TAHOMA, CA | 800 | 10 | — |
| CHURCH OF JESUS CHRIST OF LDS (SWS) | ELK GROVE, CA | 800 | 6 | — |
| USN SAN CLEMENTE ISLAND | SAN DIEGO, CA | 800 | 57 | — |
| SENIOR CANYON MUTUAL WATER CO | OJAI, CA | 800 | 42 | — |
| MONROE/LEINBERGER CNTR - WATERS | WOODLAND, CA | 800 | 14 | — |
| WEST VALLEY COUNTY WATER DISTRICT | SACRAMENTO, CA | 798 | 21 | — |
| PONDEROSA BASIN MUTUAL WTR CO | MARIPOSA, CA | 798 | 30 | Detected |
| DAGGETT COMM SVCS DIST | DAGGETT, CA | 795 | 41 | — |
| TAHOE CITY PUD - TAHOE CEDARS | TAHOE CITY, CA | 793 | 20 | — |
| BIG PINE CSD | BIG PINE, CA | 792 | 9 | — |
| DOWNIEVILLE PUBLIC U.D. | DOWNIEVILLE, CA | 783 | 20 | — |
| JUBILEE MWC | LUCERNE VALLEY, CA | 782 | 18 | — |
| LAKE OF THE WOODS MWC | FRAZIER PARK, CA | 779 | 72 | — |
| SAN LUIS HILLS | LOS BANOS, CA | 779 | 46 | — |
| MOUNTAIN MESA WC | BAKERSFIELD, CA | 777 | 11 | — |
| FCWWD 18/FRIANT | FRIANT, CA | 772 | 50 | — |
| JIREH PACKING GROUP - CUTLER | ORANGE COVE, CA | 770 | 12 | — |
| YUIMA MUNICIPAL WATER DISTRICT IDA | PAUMA VALLEY, CA | 769 | 25 | — |
| RIVERSIDE CSA #122-MESA VERDE | BLYTHE, CA | 766 | 364 | Detected |
| WHITEHAWK RANCH MWC | CLIO, CA | 765 | 9 | — |
| MEADOWCREEK MUTUAL WATER COMPANY | BISHOP, CA | 764 | 15 | — |
| PINE HILLS MUTUAL WATER COMPANY | JULIAN, CA | 760 | 47 | — |
| CENTRAL HIGH SCHOOL WEST | FRESNO, CA | 758 | 11 | — |