| TUCSON CITY OF | 732,906 | 2,267 | Detected |
| UNIVERSITY OF ARIZONA | 50,000 | 1,168 | Detected |
| METROPOLITAN DWID | 45,570 | 894 | Detected |
| ORO VALLEY WATER UTILITY | 42,316 | 2,191 | Detected |
| COMMUNITY WC OF GREEN VALLEY | 22,085 | 264 | Detected |
| USAF DAVIS MONTHAN AFB | 18,640 | 1,020 | Detected |
| SAHUARITA WATER COMPANY | 18,178 | 101 | Detected |
| VAIL WATER COMPANY | 17,500 | 173 | Detected |
| FLOWING WELLS IRRIGATION DISTRICT | 16,000 | 936 | Detected |
| MARANA MUNICIPAL - MARANA | 15,162 | 177 | Detected |
| TUCSON WATER CORONA DE TUCSON | 10,217 | 43 | Detected |
| GREEN VALLEY DWID | 8,687 | 170 | Detected |
| QUAIL CREEK WATER COMPANY | 6,812 | 68 | Detected |
| AVRA WATER COOP INC | 6,685 | 143 | Detected |
| GW FARMERS WATER CO - CONTINENTAL | 5,592 | 159 | Detected |
| METROPOLITAN DWID - DIABLO VILLAGE | 5,542 | 116 | Detected |
| MARANA MUNICIPAL - PICTURE ROCKS | 5,278 | 117 | Detected |
| MARANA MUNICIPAL - HARTMAN VISTAS | 5,248 | 42 | Detected |
| MARANA MUNICIPAL - AIRLINE LAMBERT | 4,568 | 99 | — |
| ORO VALLEY WATER COUNTRYSIDE | 4,534 | 143 | Detected |
| ADOC TUCSON | 4,500 | 567 | Detected |
| RAY WATER COMPANY INC | 4,495 | 151 | Detected |
| METROPOLITAN DWID - HUB | 4,252 | 157 | Detected |
| GW FARMERS WATER CO - SANTA RITA SPRINGS | 3,990 | 106 | Detected |
| SPANISH TRAIL WATER COMPANY | 3,822 | 228 | — |
| GW SAGUARO DIST WATER CO - LAS QUINTAS | 3,720 | 204 | Detected |
| SAGUARO WATER COMPANY | 3,243 | 156 | — |
| VOYAGER WATER COMPANY | 3,209 | 168 | Detected |
| GW OCOTILLO WATER - RANCHO DEL SOL LINDO | 3,128 | 39 | — |
| TUCSON MEDICAL CENTER | 3,000 | 153 | — |
| UA TECH PARK - RITA ROAD | 3,000 | 86 | Detected |
| AJO IMPROVEMENT COMPANY | 2,654 | 85 | — |
| CS LOS CERROS WATER COMPANY INC | 2,613 | 202 | — |
| MARANA HIGH SCHOOL | 2,450 | 156 | — |
| ARIZONA WATER CO - AJO | 2,100 | 13 | — |
| MARANA ESTES ELEMENTARY SCHOOL | 2,000 | 139 | — |
| MARANA DWID - DERRINGER | 1,950 | 287 | — |
| VAIL SCHOOL DISTRICT - ELEMENTARY SCHOOL | 1,680 | 77 | — |
| SAGUARO NATIONAL PARK | 1,440 | 34 | — |
| SALPOINTE CATHOLIC HIGH SCHOOL | 1,300 | 92 | — |
| GW OCOTILLO WATER - CATALINA | 1,168 | 25 | — |
| TOWN & COUNTRY ESTATES | 960 | 222 | — |
| RINCON COUNTRY EAST RV PARK | 912 | 61 | — |
| RANCHO DEL CONEJO COMM WATER COOP | 900 | 275 | — |
| METROPOLITAN DWID - E&T SYSTEM | 880 | 101 | — |
| SANDARIO WATER COMPANY | 870 | 45 | — |
| FAR HORIZONS EAST MHP | 870 | 34 | — |
| TUCSON COUNTRY DAY SCHOOL | 800 | 41 | Detected |
| ORGAN PIPE NM HEADQUARTERS | 755 | 90 | — |
| MARANA MUNICIPAL - SILVERBELL GATEWAY | 750 | 0 | — |