Water Systems Serving Zip Code 94548
Not sure which system is yours? Most residents in ZIP 94548 are likely served by Contra Costa Water District (population served: 198,000). Check your water bill for your provider name if you're unsure.
Direct EPA ZIP Matches
2 active water systems have this ZIP in EPA records.
| Water system | Serves | Source | Violations | What kind |
|---|---|---|---|---|
| Knightsen Elementary School | 350 | Groundwater | 13 | 13 over limit |
| Brentwood Marina | 30 | Groundwater | 0 | none on record |
Broader Knightsen, California Matches
EPA often omits served ZIP codes for large utilities. These systems are tied to Knightsen, California based on this ZIP code's city or county.
| Water system | Serves | Source | Violations | What kind |
|---|---|---|---|---|
| Contra Costa Water District | 198,000 | Surface Water | 0 | none on record |
| City of Antioch | 115,074 | Surface Water | 0 | none on record |
| Brentwood | 64,513 | Surface Water Purchased | 6 | 1 over limit |
| City of Pittsburg | 62,500 | Surface Water Purchased | 0 | none on record |
| Diablo Water District | 43,357 | Surface Water Purchased | 0 | none on record |
| City of Martinez | 30,997 | Surface Water Purchased | 1 | |
| Golden State Water Company - Bay Point | 23,731 | Surface Water Purchased | 0 | none on record |
| Town of Discovery Bay | 16,790 | Groundwater | 0 | none on record |
| Pleasantimes Mutual Water Co | 644 | Groundwater | 0 | none on record |
| Clayton Palms Water | 549 | Surface Water Purchased | 1 | |
| Willow Mobile Home Park | 481 | Groundwater | 1 | |
| Willow Park Marina | 380 | Groundwater | 16 | 16 over limit |
| Orwood Resort | 350 | Groundwater | 3 | |
| Delta Mutual Water Company | 333 | Groundwater | 18 | 17 over limit |
| Riverview Water Association | 230 | Groundwater | 1 | |
| Camino Mobilehome | 210 | Groundwater | 1 | |
| Bethel Island Estates | 200 | Groundwater | 0 | none on record |
| Bethel Island Mhc | 185 | Groundwater | 1 | |
| Oakley Mutual Water Company | 170 | Groundwater | 15 | 13 over limit |
| Big Oak Mobile Home Park Water | 156 | Groundwater | 0 | none on record |
| Farrar Park Property Owners | 140 | Groundwater | 1 | |
| Riverview Mobile Home Park | 126 | Groundwater | 2 | |
| Bethel Island Mutual Water Co | 123 | Groundwater | 2 | |
| Russos Mobile Park | 110 | Groundwater | 3 | |
| Sandmound Mutual | 100 | Groundwater | 4 | |
| Anglers Subdivision 4 | 99 | Groundwater | 1 | |
| Bella Vista Water Sys | 93 | Groundwater | 19 | 13 over limit |
| Marina Mobile Manor | 75 | Groundwater | 0 | none on record |
| Knightsen Community Water System | 73 | Groundwater | 0 | none on record |
| Sandy Point Mobile Home Park | 67 | Groundwater | 4 | |
| Doubletree Ranch Water System | 66 | Groundwater | 31 | 30 over limit |
| Moraga Heights Mutual Water | 66 | Groundwater | 0 | none on record |
| Angler S Ranch #3 | 60 | Groundwater | 1 | |
| Dutch Slough Water Works | 49 | Groundwater | 2 | |
| Casa Medanos Water System | 45 | Groundwater | 1 | |
| Colonia Santa Maria | 32 | Groundwater | 5 | |
| Wilcox Station Ranch | 31 | Groundwater | 1 | |
| Randall-Bold Water Treatment Plant | 1 | Surface Water Purchased | 0 | none on record |
| Ccwd/Brentwood Wtp | 0 | Surface Water Purchased | 0 | none on record |
| Excelsior Middle School | 600 | Groundwater | 1 | |
| Mount Diablo State Park | 364 | Groundwater | 9 | |
| Canyon School | 238 | Groundwater | 2 | |
| Byron Corners Inc | 205 | Groundwater | 1 | |
| Country Junction Deli | 200 | Groundwater | 1 | |
| Bruns Memorial Amphitheater | 200 | Surface Water Purchased | 0 | none on record |
| Dwr Delta Field Division - Banks Pp | 180 | Surface Water | 2 | |
| Los Vaqueros Marina Bldg | 180 | Surface Water | 0 | none on record |
| Sugar Barge Marina | 150 | Groundwater | 1 | |
| Delta Sportsman | 150 | Groundwater | 0 | none on record |
| Gas N Save | 120 | Groundwater | 6 | |
| Concord Mt Diablo Trailride Assoc. | 120 | Groundwater | 1 | |
| Ebrpd Alhambra | 115 | Groundwater | 0 | none on record |
| Ebrpd Bay Point Regional Shoreline | 105 | Groundwater | 0 | none on record |
| Bethel Market | 100 | Groundwater | 0 | none on record |
| Delta Bar and Grill | 100 | Groundwater | 0 | none on record |
| Macs Old House | 90 | Groundwater | 0 | none on record |
| Ebrpd Round Valley Water System | 82 | Groundwater | 0 | none on record |
| New Life Marina | 80 | Groundwater | 0 | none on record |
| Old Borges Ranch Water Sys | 75 | Groundwater | 3 | 1 over limit |
| Cruiser Haven Marina | 75 | Groundwater | 1 | |
| Bethel Baptist Church | 75 | Groundwater | 0 | none on record |
| Bridgehead Cafe | 75 | Groundwater | 0 | none on record |
| Ebrpd Black Diamond Mines | 74 | Groundwater | 0 | none on record |
| Ebrpd Little Hills | 66 | Groundwater | 0 | none on record |
| Wahl Family Water System | 65 | Groundwater | 1 | |
| Willow Pass Bussiness Park Water System | 60 | Groundwater | 1 | |
| Byron Inn | 60 | Groundwater | 0 | none on record |
| Ebrpd Morgan Territory | 57 | Groundwater | 0 | none on record |
| Mcavoy Yacht Harbor | 55 | Groundwater | 0 | none on record |
| Bethel Missionary Baptist | 54 | Groundwater | 0 | none on record |
| Byron United Methodist | 50 | Groundwater | 0 | none on record |
| Ebrpd Old Briones Regional Park | 47 | Groundwater | 0 | none on record |
| Bethel Harbor | 45 | Groundwater | 0 | none on record |
| Holland Riverside Marina | 45 | Groundwater | 0 | none on record |
| Bay Standards | 41 | Groundwater | 1 | |
| Byron Airport | 35 | Groundwater | 0 | none on record |
| Willowest Marina Ws | 35 | Groundwater | 0 | none on record |
| All Star Academy of Danville | 30 | Groundwater | 2 | |
| Sunset Marina | 30 | Groundwater | 0 | none on record |
| Wildwood Acres Resort | 28 | Groundwater | 0 | none on record |
| Byron Roadhouse | 25 | Groundwater | 1 | 1 over limit |
| Los Vaqueros Interpretive Center | 25 | Surface Water | 0 | none on record |
| Marin Food Specialties | 25 | Groundwater | 0 | none on record |
| Tess Farm Market | 25 | Groundwater | 0 | none on record |