We found 47 public water systems in Alameda county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| East Bay Mud | County of Alameda | 1,379,000 | 153 | 5 |
| Alameda County Water District | County of Alameda | 340,000 | 114 | 3 |
| City Of Hayward | Hayward | 151,600 | 49 | 0 |
| Dublin San Ramon Services District | County of Alameda | 75,924 | 42 | 0 |
| City Of Pleasanton | Pleasanton | 73,067 | 87 | 2 |
| California Water Service - Livermore | County of Alameda | 56,700 | 141 | 0 |
| City Of Livermore | Livermore | 27,600 | 30 | 1 |
| Ebrpd - Del Valle Regional Park | County of Alameda | 10,000 | 0 | 26 |
| Alameda Point | County of Alameda | 750 | 0 | 0 |
| Rancho Los Mochos-bsa Camp | County of Alameda | 600 | 0 | 1 |
| Ebrpd - Shadow Cliffs Regional Park | County of Alameda | 593 | 0 | 0 |
| Trailer Haven Mobile Home Park | County of Alameda | 543 | 0 | 3 |
| Castlewood Domestic Water System | County of Alameda | 499 | 0 | 3 |
| Town Of Sunol-sfpuc | County of Alameda | 450 | 0 | 1 |
| Oakland Council B.s.a. | County of Alameda | 250 | 0 | 0 |
| Rivers End Marina | County of Alameda | 250 | 0 | 27 |
| Rancho Del Rio Labor Camp #65- | County of Alameda | 200 | 0 | 0 |
| Mohrland Mutual Water System | County of Alameda | 116 | 0 | 0 |
| Donna Pirro | County of Alameda | 100 | 0 | 0 |
| Cal Dept Of Water Resources | County of Alameda | 95 | 0 | 0 |
| Stivers Academy | County of Alameda | 90 | 0 | 0 |
| Usbr-sldmwa - Cvp Jones Pumping Plant | Byron | 90 | 0 | 0 |
| Alameda County Fairgrounds | County of Alameda | 82 | 0 | 0 |
| Cemex/eliot Plant | County of Alameda | 70 | 0 | 0 |
| Golden Gate Church | County of Alameda | 50 | 0 | 0 |
| Norris Canyon Property Owners Assn | County of Alameda | 50 | 0 | 0 |
| Mountain House School | County of Alameda | 50 | 0 | 0 |
| Purple Orchid Resort Spa | Livermore | 45 | 0 | 0 |
| ZONE 7 WATER AGENCY | County of Alameda | 40 | 0 | 0 |
| Ebrpd - Garin Regional Park | County of Alameda | 40 | 0 | 0 |
| Ebrpd - Sunol Regional Wilderness | County of Alameda | 35 | 0 | 0 |
| Ebrpd - Redwood Spring Regional Park | County of Alameda | 35 | 0 | 0 |
| Pleasanton Gravel Company | County of Alameda | 26 | 0 | 0 |
| Bartlett Lane Water System | County of Alameda | 25 | 0 | 0 |
| Pyzer Water System | County of Alameda | 25 | 0 | 0 |
| Castlewood Country Club | County of Alameda | 25 | 0 | 0 |
| Bartlett Lane Water System | County of Alameda | 25 | 0 | 0 |
| Mountain House Bar | County of Alameda | 25 | 0 | 0 |
| Ebrpd - Mission Peak Regional Preserve | County of Alameda | 10 | 0 | 0 |
| Sfpuc-pleasanton Wells | County of Alameda | 1 | 0 | 0 |
| Morton Salt Company | County of Alameda | 0 | 0 | 0 |
| Fremont Community Church | County of Alameda | 0 | 0 | 0 |
| U. S. Pipe And Foundry | County of Alameda | 0 | 0 | 0 |
| Weibel Water System | County of Alameda | 0 | 0 | 0 |
| Pyzer Water System | County of Alameda | 0 | 0 | 0 |
| Washington Hospital Healthcare System | County of Alameda | 0 | 0 | 0 |
| Cecilia Court Water System | County of Alameda | 0 | 0 | 0 |