Tapcensus

Water quality for ZIP code 93445

ZIP 93445 covers Oceano and Grover Beach in San Luis Obispo County, California, one of 23 ZIP codes in the county. 172 active public water systems serve the county; 54 had an EPA violation in the past three years.

Most likely your provider

Callender Grove Mutual Water CA4000805 · Community water system · Ground water
Serves 116 people Rules violated, past 3 years 1 Last sanitary survey Dec 7, 2023 Distance 1.7 mi
View system details EPA facility report

Other community water systems in San Luis Obispo County

71 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Woodland Park Mutual Water CO
 538 2 2.6 mi
Laguna Negra Mutual Water Co.
 80 1 2.8 mi
Mesa Dunes Mobile Home Estates
 600 0 2.9 mi
Golden State Water Company-Cypress Ridge
 2,032 0 3.5 mi
Woodlands Development
 3,862 0 4.0 mi
Oceano Comm Services Dist.
 7,598 0 4.1 mi
Halcyon Water System
 110 3 4.3 mi
Ken Mar Gardens
 84 2 4.6 mi
City of Grover Beach Public Works Dept
 12,701 0 5.3 mi
City of Arroyo Grande Utilities Division
 17,963 1 5.9 mi
Nipomo Comm Services Dist
 13,771 0 6.6 mi
Rim Rock Water Company
 55 2 6.7 mi
Golden State Water Company Nipomo
 4,512 0 7.1 mi
Terra de Oro Water Company
 38 0 7.2 mi
Canyon Crest Mutual Benefit WC
 133 0 7.2 mi
Country Hills Estates
 60 0 7.3 mi
Pismo Beach Water Department
 7,944 2 7.4 mi
Rancho Nipomo Water Company
 44 0 7.4 mi
Anza Vineyard Estates Mutual Water CO
 60 0 8.9 mi
Monte Sereno Mutual Benefit Water
 65 0 9.8 mi
H2o, INC
 70 1 10.0 mi
Las Ventanas Ranch
 108 0 10.2 mi
Avila Beach Community Services District
 1,630 0 11.1 mi
Avila Valley Mutual Water CO
 75 0 11.3 mi
Varian Ranch Mutual Water
 105 0 11.6 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
Precision Mutual Water Company
 25 1 0
Zoo Med-Winterhaven
Cayucos 		80 1 0
Sheridan Road Mutual Water Association
 38 1 1
Greenheart Farms
 91 0 0
Pacific Dunes Ranch
 26 0 0
Ball Tagawa Growers
 60 0 0
Jack Ready Imagination Park
Cayucos 		200 0 0
Laetitia Vineyard & Winery INC
 62 0 0
Coastal Christian School
 650 0 0
Speedling, INC
 40 0 0
Branch Elementary School
 253 0 0
Center of Effort Winery
 75 0 0
Talley Farms Labor Housing
 90 0 0
Chamisal Vineyards
Cayucos 		40 0 0
Playa Dulce
 35 0 0
Cuyama Lane Water Company
 25 3 1
Biddle Regional County Park
 27 0 0
Sycamore Mineral Springs Resort
 200 1 1
Port San Luis Harbor District
 125 0 0
Edna Valley Vineyards
 30 0 0
Strasbaugh, INC
 200 1 0
Noll Properties
 100 0 0
Octagon Barn Center Association
 200 0 0
J M Sims Water Supply
 34 0 0
Waste Connections Water CO
 35 1 0
Slo Partners
 40 1 1
Vachell Water System
 150 1 1
Fiero Lane Water Company, Inc.
 324 0 0
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
Tank Farm Business Park
 45 2 1
Toyota San Luis Obispo
 57 0 0
Parsons Water Supply
 35 0 0
Lopez Recreation Area
 100 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, the county this ZIP code lies in, nearest to the ZIP code's centre 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.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.