Tapcensus

Water quality in Morro Bay, California

Morro Bay 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

Morro Bay PW Dept Water Division CA4010011 · Community water system · Surface water purchased
Serves 10,757 people Rules violated, past 3 years 0 Last sanitary survey Dec 9, 2025 Distance 0.8 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
Rancho Colina Mobile Home Park
 252 1 2.3 mi
Los Osos Community Services District
 7,086 0 3.7 mi
S & T Mutual Water Company
 591 0 3.7 mi
Slocsa #10a Cayucos
 1,200 0 4.2 mi
Golden State Water Company los Osos
 5,942 0 4.3 mi
Slo Csa No. 10 Cayucos Wtp
 0 0 5.2 mi
Cayucos Beach Mutual Water Company
 2,567 0 5.5 mi
Morro Rock Mutual Water CO
 2,181 0 5.9 mi
Chorro Valley Pipeline Slo County
 0 0 7.9 mi
California Mens Colony
 15,000 0 10.1 mi
Bassi Ranch Mutual Water Co.
 85 2 10.9 mi
Bear Valley Water Company
 45 2 10.9 mi
Irish Hills Mutual Water CO
 135 0 11.3 mi
Nacimiento Water Project
 0 0 12.6 mi
Atascadero Mutual Water CO
 33,307 0 12.8 mi
San Luis Obispo Water Department
 49,534 0 13.2 mi
Higuera Apartments
 30 3 13.9 mi
San Miguelito Mwc
 1,600 1 14.6 mi
Slo Cwwd No. 23 Santa Margarita
 1,291 0 14.7 mi
Atascadero State Hospital
 1,100 1 14.8 mi
Baron Canyon Mutual Water Co.
 81 0 15.0 mi
Garden Farms C.w.d.
 440 1 15.1 mi
Avila Valley Mutual Water CO
 75 0 15.2 mi
Avila Beach Community Services District
 1,630 0 15.3 mi
Afuera de Chorro Water Company
 85 1 15.5 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
The Anderson
Cayucos 		500 0 0
Calipaso Winery
Cayucos 		130 0 0
LE Cuvier Winery
Cayucos 		92 0 0
Montana de Oro State Park
 990 1 0
Cerro Alto Campground
 30 1 0
Halfway Station
 25 1 0
Congregation Beth David
 25 0 0
Madonna Inn Water Company
 120 3 1
Elks Lodge #322
 40 3 1
Harmony Water Works
 27 0 0
Toyota San Luis Obispo
 57 0 0
Tiger Water Supply
 1,600 0 0
Paragon Triangle Water Supply
 50 0 0
141 Suburban Road Water Supply
 25 1 0
Tank Farm Business Park
 45 2 1
Vachell Water System
 150 1 1
Octagon Barn Center Association
 200 0 0
Holdgrafer & Associates
 30 0 0
Tmc Suburban, LLC
 25 0 0
Horizon Lane Water Supply
 32 0 0
Aronhill Vineyard
 25 0 0
Santa Margarita Ranch Headquarters
Cayucos 		62 0 0
Port San Luis Harbor District
 125 0 0
Parsons Water Supply
 35 0 0
Waste Connections Water CO
 35 1 0
J M Sims Water Supply
 34 0 0
Slo Partners
 40 1 1
Sycamore Mineral Springs Resort
 200 1 1
Fiero Lane Water Company, Inc.
 324 0 0
Jada Vineyard and Winery
San Simeon 		39 0 0
Playa Dulce
 35 0 0
Noll Properties
 100 0 0
Strasbaugh, INC
 200 1 0
Niner Wine Estates, LLC
 25 0 0
Grosso Kresser Winery
San Simeon 		3,606 0 0
Brecon Estate
San Simeon 		9,012 0 0
Booker Winery
Cayucos 		56 0 0
Paso Robles Chevrolet Cadillac
 25 0 0
Caelesta Winery
Cayucos 		30 0 0
Edna Valley Vineyards
 30 0 0
Daou Vineyards, LLC
 26 0 0
Adelaida Vineyards & Winery
San Simeon 		27 1 0
Carpenter Winery
Cayucos 		54 0 0
Center of Effort Winery
 75 0 0
Mt. Olive Organic Farm
Cayucos 		51 0 0
Granite Ridge
 50 0 0
Chamisal Vineyards
Cayucos 		40 0 0
Parrish Family Winery
 207 0 0
Santa Margarita KOA
 70 0 0
Santa Margarita Recreation Area
 150 0 0
All non-community systems
About this data

Water systems are matched to San Luis Obispo County, nearest to Morro Bay 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.