San Luis Obispo County, California — public water systems
167 active public water systems serve San Luis Obispo County, reporting 347.6K people served.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
167
Population served
347.6K
Community systems
73
Groundwater share
80.8%
Water systems in San Luis Obispo County
| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Santa Margarita Recreation Area | San Luis Obispo | 50,001 | Transient non-community | Groundwater |
| 2 | San Luis Obispo Water Department | San Luis Obispo | 47,788 | Community | Surface water |
| 3 | City of Paso Robles Water Division | San Luis Obispo | 31,176 | Community | Surface water |
| 4 | Atascadero Mutual Water Co | San Luis Obispo | 30,618 | Community | Groundwater |
| 5 | City of Arroyo Grande Utilities Division | San Luis Obispo | 17,963 | Community | Purchased surface water |
| 6 | California Mens Colony | San Luis Obispo | 15,000 | Community | Surface water |
| 7 | Nipomo Comm Services Dist | San Luis Obispo | 13,771 | Community | Purchased surface water |
| 8 | Morro Bay Pw Dept - Water Division | San Luis Obispo | 13,757 | Community | Purchased surface water |
| 9 | City of Grover Beach Public Works Dept | San Luis Obispo | 12,701 | Community | Surface water |
| 10 | Brecon Estate | San Luis Obispo | 9,012 | Transient non-community | Groundwater |
| 11 | Pismo Beach Water Department | San Luis Obispo | 8,036 | Community | Purchased surface water |
| 12 | Templeton Csd | San Luis Obispo | 8,011 | Community | Groundwater |
| 13 | Oceano Comm Services Dist. | San Luis Obispo | 7,601 | Community | Purchased surface water |
| 14 | Los Osos Community Services District | San Luis Obispo | 7,086 | Community | Groundwater |
| 15 | Golden State Water Company - Los Osos | San Luis Obispo | 5,924 | Community | Groundwater |
| 16 | Cambria Comm Services Dist | San Luis Obispo | 5,532 | Community | Groundwater |
| 17 | Golden State Water Company - Nipomo | San Luis Obispo | 4,506 | Community | Purchased surface water |
| 18 | Atascadero State Hospital | San Luis Obispo | 4,100 | Community | Groundwater |
| 19 | Woodlands Development | San Luis Obispo | 3,862 | Community | Purchased surface water |
| 20 | Grosso Kresser Winery | San Luis Obispo | 3,606 | Transient non-community | Groundwater |
| 21 | Heritage Ranch Csd | San Luis Obispo | 2,956 | Community | Surface water |
| 22 | San Miguel Community Services District | San Luis Obispo | 2,600 | Community | Groundwater |
| 23 | Cayucos Beach Mutual Water Company | San Luis Obispo | 2,567 | Community | Purchased surface water |
| 24 | Nacimiento Water Company | San Luis Obispo | 2,181 | Community | Surface water |
| 25 | Morro Rock Mutual Water Co | San Luis Obispo | 2,181 | Community | Purchased surface water |
| 26 | Golden State Water Company-Cypress Ridge | San Luis Obispo | 2,026 | Community | Groundwater |
| 27 | Avila Beach Community Services District | San Luis Obispo | 1,630 | Community | Purchased surface water |
| 28 | San Miguelito Mwc | San Luis Obispo | 1,600 | Community | Purchased surface water |
| 29 | Tiger Water Supply | San Luis Obispo | 1,600 | Non-transient non-community | Groundwater |
| 30 | Lopez Project | San Luis Obispo | 1,569 | Community | Surface water |
| 31 | County of Monterey-Lake Nacimiento | San Luis Obispo | 1,521 | Non-transient non-community | Groundwater under influence of surface water |
| 32 | Golden State Water Company - Edna | San Luis Obispo | 1,493 | Community | Groundwater |
| 33 | Caltrans - Shandon Rest Stop | San Luis Obispo | 1,300 | Transient non-community | Groundwater |
| 34 | Slo Cwwd No. 23 - Santa Margarita | San Luis Obispo | 1,291 | Community | Groundwater |
| 35 | Pg&E | San Luis Obispo | 1,200 | Non-transient non-community | Surface water |
| 36 | Slocsa #10a - Cayucos | San Luis Obispo | 1,200 | Community | Purchased surface water |
| 37 | Slo Csa No. 16 - Shandon | San Luis Obispo | 1,085 | Community | Purchased surface water |
| 38 | Daou Vineyards, LLC | San Luis Obispo | 1,025 | Non-transient non-community | Groundwater |
| 39 | Montana De Oro State Park | San Luis Obispo | 990 | Transient non-community | Surface water |
| 40 | Laureate Water Company | San Luis Obispo | 700 | Community | Groundwater |
| 41 | Coastal Christian School | San Luis Obispo | 650 | Non-transient non-community | Groundwater |
| 42 | Mesa Dunes Mobile Home Estates | San Luis Obispo | 600 | Community | Groundwater |
| 43 | S & T Mutual Water Company | San Luis Obispo | 591 | Community | Groundwater |
| 44 | Woodland Park Mutual Water Co | San Luis Obispo | 538 | Community | Groundwater |
| 45 | Hearst Memorial State Beach | San Luis Obispo | 500 | Transient non-community | Purchased surface water |
| 46 | Walnut Hills Mutual Water Co | San Luis Obispo | 486 | Community | Groundwater |
| 47 | San Simeon Csd | San Luis Obispo | 462 | Community | Groundwater |
| 48 | Garden Farms C.W.D. | San Luis Obispo | 440 | Community | Groundwater |
| 49 | Los Robles Mobile Home Estates | San Luis Obispo | 420 | Community | Groundwater |
| 50 | Vines R.V. Resort | San Luis Obispo | 400 | Transient non-community | Groundwater |