Tapcensus

Water quality in Callender, California

Callender 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

Woodland Park Mutual Water CO CA4000506 · Community water system · Ground water
Serves 538 people Rules violated, past 3 years 2 Last sanitary survey Feb 21, 2024 Distance 0.3 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
Laguna Negra Mutual Water Co.
 80 1 0.4 mi
Callender Grove Mutual Water
 116 1 1.0 mi
Woodlands Development
 3,862 0 1.9 mi
Mesa Dunes Mobile Home Estates
 600 0 1.9 mi
Golden State Water Company-Cypress Ridge
 2,032 0 2.1 mi
Halcyon Water System
 110 3 4.0 mi
Nipomo Comm Services Dist
 13,771 0 4.1 mi
Ken Mar Gardens
 84 2 4.1 mi
Rim Rock Water Company
 55 2 4.2 mi
Oceano Comm Services Dist.
 7,598 0 4.4 mi
Golden State Water Company Nipomo
 4,512 0 4.8 mi
Rancho Nipomo Water Company
 44 0 5.1 mi
City of Arroyo Grande Utilities Division
 17,963 1 5.3 mi
City of Grover Beach Public Works Dept
 12,701 0 5.6 mi
Canyon Crest Mutual Benefit WC
 133 0 6.1 mi
Country Hills Estates
 60 0 6.2 mi
Terra de Oro Water Company
 38 0 6.2 mi
Pismo Beach Water Department
 7,944 2 8.1 mi
Monte Sereno Mutual Benefit Water
 65 0 8.6 mi
Las Ventanas Ranch
 108 0 8.7 mi
Anza Vineyard Estates Mutual Water CO
 60 0 9.2 mi
H2o, INC
 70 1 9.2 mi
Varian Ranch Mutual Water
 105 0 10.5 mi
Edna Valley Ranch East
 132 0 11.4 mi
Avila Valley Mutual Water CO
 75 0 12.3 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
Sheridan Road Mutual Water Association
 38 1 1
Zoo Med-Winterhaven
Cayucos 		80 1 0
Precision Mutual Water Company
 25 1 0
Greenheart Farms
 91 0 0
Ball Tagawa Growers
 60 0 0
Jack Ready Imagination Park
Cayucos 		200 0 0
Pacific Dunes Ranch
 26 0 0
Laetitia Vineyard & Winery INC
 62 0 0
Speedling, INC
 40 0 0
Coastal Christian School
 650 0 0
Branch Elementary School
 253 0 0
Cuyama Lane Water Company
 25 3 1
Talley Farms Labor Housing
 90 0 0
Biddle Regional County Park
 27 0 0
Center of Effort Winery
 75 0 0
Chamisal Vineyards
Cayucos 		40 0 0
Edna Valley Vineyards
 30 0 0
Playa Dulce
 35 0 0
Sycamore Mineral Springs Resort
 200 1 1
Lopez Recreation Area
 100 0 0
Strasbaugh, INC
 200 1 0
Port San Luis Harbor District
 125 0 0
Noll Properties
 100 0 0
J M Sims Water Supply
 34 0 0
Slo Partners
 40 1 1
Waste Connections Water CO
 35 1 0
Fiero Lane Water Company, Inc.
 324 0 0
Octagon Barn Center Association
 200 0 0
Vachell Water System
 150 1 1
Horizon Lane Water Supply
 32 0 0
Tmc Suburban, LLC
 25 0 0
141 Suburban Road Water Supply
 25 1 0
Paragon Triangle Water Supply
 50 0 0
Holdgrafer & Associates
 30 0 0
Parsons Water Supply
 35 0 0
Tank Farm Business Park
 45 2 1
Toyota San Luis Obispo
 57 0 0
Elks Lodge #322
 40 3 1
Madonna Inn Water Company
 120 3 1
Tiger Water Supply
 1,600 0 0
Congregation Beth David
 25 0 0
Santa Margarita KOA
 70 0 0
Santa Margarita Recreation Area
 150 0 0
Montana de Oro State Park
 990 1 0
Santa Margarita Ranch Headquarters
Cayucos 		62 0 0
Cerro Alto Campground
 30 1 0
Granite Ridge
 50 0 0
Halfway Station
 25 1 0
The Anderson
Cayucos 		500 0 0
Calipaso Winery
Cayucos 		130 0 0
All non-community systems
About this data

Water systems are matched to San Luis Obispo County, nearest to Callender 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. Retrieved from ECHO on Oct 11, 2026.