Tapcensus

Water quality in Santa Margarita, California

Santa Margarita is in San Luis Obispo County. 172 active public water systems serve the county; 54 had an EPA violation in the past three years.

Most likely your provider

Slo Cwwd No. 23 Santa Margarita CA4010024 · Community water system · Ground water
Serves 1,291 people Rules violated, past 3 years 0 Last sanitary survey Dec 19, 2024 Distance under 0.1 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in San Luis Obispo County

71 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Garden Farms C.w.d.
 440 1 2.0 mi
Atascadero State Hospital
 1,100 1 5.3 mi
Nacimiento Water Project
 0 0 6.5 mi
California Mens Colony
 15,000 0 6.8 mi
Atascadero Mutual Water CO
 33,307 0 7.0 mi
Chorro Valley Pipeline Slo County
 0 0 8.6 mi
San Luis Obispo Water Department
 49,534 0 8.7 mi
Afuera de Chorro Water Company
 85 1 8.9 mi
Bassi Ranch Mutual Water Co.
 85 2 10.2 mi
Bear Valley Water Company
 45 2 10.2 mi
Irish Hills Mutual Water CO
 135 0 10.2 mi
Higuera Apartments
 30 3 11.1 mi
Lopez Project
 69 1 11.1 mi
Golden State Water Company Edna
 1,495 0 11.5 mi
Edna Valley Ranch East
 132 0 12.5 mi
Templeton Csd
 8,041 0 13.0 mi
Rancho Colina Mobile Home Park
 252 1 13.0 mi
Baron Canyon Mutual Water Co.
 81 0 13.1 mi
Los Osos Community Services District
 7,086 0 13.4 mi
Los Robles Mobile Home Estates
 420 0 13.9 mi
Santa Ysabel Ranch Mwc
 344 0 14.0 mi
Spanish Lakes Mutual Water CO
 125 0 14.0 mi
Varian Ranch Mutual Water
 105 0 14.1 mi
Morro Bay PW Dept Water Division
 10,757 0 14.1 mi
Golden State Water Company los Osos
 5,942 0 14.1 mi
All 72 community water systems in San Luis Obispo County
Non-community systems in San Luis Obispo County (100: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Santa Margarita Ranch Headquarters
Cayucos 		62 0 0
Granite Ridge
 50 0 0
Santa Margarita Recreation Area
 150 0 0
Tiger Water Supply
 1,600 0 0
Santa Margarita KOA
 70 0 0
Cerro Alto Campground
 30 1 0
Madonna Inn Water Company
 120 3 1
Halfway Station
 25 1 0
Elks Lodge #322
 40 3 1
Parsons Water Supply
 35 0 0
Congregation Beth David
 25 0 0
Loading Chute
 25 1 0
Creston Country Store
 25 1 0
Creston Elementary School
 100 0 0
Longbranch Saloon, the
 30 0 0
Fiero Lane Water Company, Inc.
 324 0 0
Tank Farm Business Park
 45 2 1
Holdgrafer & Associates
 30 0 0
Slo Partners
 40 1 1
Horizon Lane Water Supply
 32 0 0
J M Sims Water Supply
 34 0 0
Toyota San Luis Obispo
 57 0 0
Waste Connections Water CO
 35 1 0
Tmc Suburban, LLC
 25 0 0
141 Suburban Road Water Supply
 25 1 0
Paragon Triangle Water Supply
 50 0 0
Noll Properties
 100 0 0
Strasbaugh, INC
 200 1 0
Vachell Water System
 150 1 1
Octagon Barn Center Association
 200 0 0
Caelesta Winery
Cayucos 		30 0 0
Edna Valley Vineyards
 30 0 0
Chamisal Vineyards
Cayucos 		40 0 0
Center of Effort Winery
 75 0 0
Aronhill Vineyard
 25 0 0
Paso Robles Chevrolet Cadillac
 25 0 0
Niner Wine Estates, LLC
 25 0 0
Playa Dulce
 35 0 0
Booker Winery
Cayucos 		56 0 0
Lopez Recreation Area
 100 0 0
Sycamore Mineral Springs Resort
 200 1 1
Biddle Regional County Park
 27 0 0
Talley Farms Labor Housing
 90 0 0
Montana de Oro State Park
 990 1 0
The Anderson
Cayucos 		500 0 0
Calipaso Winery
Cayucos 		130 0 0
LE Cuvier Winery
Cayucos 		92 0 0
Jada Vineyard and Winery
San Simeon 		39 0 0
Port San Luis Harbor District
 125 0 0
Coastal Christian School
 650 0 0
All non-community systems
About this data

Water systems are matched to San Luis Obispo County, nearest to Santa Margarita first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.