Tapcensus

Water quality for ZIP code 93410

ZIP 93410 covers California Polytechnic State University 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

Nacimiento Water Project CA4010080 · Community water system · Surface water
Serves 0 people Rules violated, past 3 years 0 Last sanitary survey Sep 18, 2023 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
San Luis Obispo Water Department
 49,534 0 2.0 mi
California Mens Colony
 15,000 0 2.7 mi
Afuera de Chorro Water Company
 85 1 3.4 mi
Irish Hills Mutual Water CO
 135 0 3.7 mi
Bassi Ranch Mutual Water Co.
 85 2 3.7 mi
Bear Valley Water Company
 45 2 3.7 mi
Higuera Apartments
 30 3 4.3 mi
Chorro Valley Pipeline Slo County
 0 0 4.7 mi
Lopez Project
 69 1 5.0 mi
Golden State Water Company Edna
 1,495 0 5.7 mi
Baron Canyon Mutual Water Co.
 81 0 6.4 mi
Slo Cwwd No. 23 Santa Margarita
 1,291 0 6.7 mi
Avila Valley Mutual Water CO
 75 0 8.0 mi
San Miguelito Mwc
 1,600 1 8.2 mi
Edna Valley Ranch East
 132 0 8.3 mi
Garden Farms C.w.d.
 440 1 8.6 mi
Anza Vineyard Estates Mutual Water CO
 60 0 9.0 mi
Avila Beach Community Services District
 1,630 0 9.3 mi
Los Osos Community Services District
 7,086 0 9.8 mi
Golden State Water Company los Osos
 5,942 0 10.0 mi
H2o, INC
 70 1 10.0 mi
Varian Ranch Mutual Water
 105 0 10.3 mi
Pismo Beach Water Department
 7,944 2 10.5 mi
S & T Mutual Water Company
 591 0 11.0 mi
Atascadero State Hospital
 1,100 1 11.3 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
Tiger Water Supply
 1,600 0 0
Madonna Inn Water Company
 120 3 1
Elks Lodge #322
 40 3 1
Congregation Beth David
 25 0 0
Parsons Water Supply
 35 0 0
Tank Farm Business Park
 45 2 1
Holdgrafer & Associates
 30 0 0
Toyota San Luis Obispo
 57 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
Fiero Lane Water Company, Inc.
 324 0 0
Slo Partners
 40 1 1
Waste Connections Water CO
 35 1 0
J M Sims Water Supply
 34 0 0
Vachell Water System
 150 1 1
Octagon Barn Center Association
 200 0 0
Noll Properties
 100 0 0
Strasbaugh, INC
 200 1 0
Edna Valley Vineyards
 30 0 0
Santa Margarita Ranch Headquarters
Cayucos 		62 0 0
Playa Dulce
 35 0 0
Sycamore Mineral Springs Resort
 200 1 1
Center of Effort Winery
 75 0 0
Chamisal Vineyards
Cayucos 		40 0 0
Santa Margarita KOA
 70 0 0
Cerro Alto Campground
 30 1 0
Santa Margarita Recreation Area
 150 0 0
Port San Luis Harbor District
 125 0 0
Montana de Oro State Park
 990 1 0
Coastal Christian School
 650 0 0
Biddle Regional County Park
 27 0 0
Talley Farms Labor Housing
 90 0 0
Halfway Station
 25 1 0
Granite Ridge
 50 0 0
Lopez Recreation Area
 100 0 0
Branch Elementary School
 253 0 0
Pacific Dunes Ranch
 26 0 0
Laetitia Vineyard & Winery INC
 62 0 0
The Anderson
Cayucos 		500 0 0
Calipaso Winery
Cayucos 		130 0 0
LE Cuvier Winery
Cayucos 		92 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
Greenheart Farms
 91 0 0
Ball Tagawa Growers
 60 0 0
Caelesta Winery
Cayucos 		30 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. Retrieved from ECHO on Oct 11, 2026.