Tapcensus

Water quality for ZIP code 93444

ZIP 93444 covers Nipomo, Woodlands, and Blacklake 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

Nipomo Comm Services Dist CA4010026 · Community water system · Surface water purchased
Serves 13,771 people Rules violated, past 3 years 0 Last sanitary survey Jun 18, 2024 Distance 0.4 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
Golden State Water Company Nipomo
 4,512 0 1.4 mi
Rim Rock Water Company
 55 2 2.6 mi
Woodlands Development
 3,862 0 2.7 mi
Rancho Nipomo Water Company
 44 0 3.5 mi
Laguna Negra Mutual Water Co.
 80 1 4.0 mi
Woodland Park Mutual Water CO
 538 2 4.0 mi
Golden State Water Company-Cypress Ridge
 2,032 0 4.9 mi
Callender Grove Mutual Water
 116 1 5.1 mi
Mesa Dunes Mobile Home Estates
 600 0 5.3 mi
Ken Mar Gardens
 84 2 6.8 mi
Halcyon Water System
 110 3 6.9 mi
Country Hills Estates
 60 0 7.5 mi
Canyon Crest Mutual Benefit WC
 133 0 7.5 mi
City of Arroyo Grande Utilities Division
 17,963 1 7.5 mi
Terra de Oro Water Company
 38 0 7.7 mi
Oceano Comm Services Dist.
 7,598 0 7.7 mi
City of Grover Beach Public Works Dept
 12,701 0 8.7 mi
Las Ventanas Ranch
 108 0 8.8 mi
Monte Sereno Mutual Benefit Water
 65 0 9.2 mi
H2o, INC
 70 1 10.4 mi
Varian Ranch Mutual Water
 105 0 11.0 mi
Pismo Beach Water Department
 7,944 2 11.3 mi
Anza Vineyard Estates Mutual Water CO
 60 0 11.9 mi
Edna Valley Ranch East
 132 0 12.5 mi
Golden State Water Company Edna
 1,495 0 14.6 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
Speedling, INC
 40 0 0
Jack Ready Imagination Park
Cayucos 		200 0 0
Ball Tagawa Growers
 60 0 0
Greenheart Farms
 91 0 0
Sheridan Road Mutual Water Association
 38 1 1
Laetitia Vineyard & Winery INC
 62 0 0
Zoo Med-Winterhaven
Cayucos 		80 1 0
Precision Mutual Water Company
 25 1 0
Cuyama Lane Water Company
 25 3 1
Branch Elementary School
 253 0 0
Pacific Dunes Ranch
 26 0 0
Coastal Christian School
 650 0 0
Talley Farms Labor Housing
 90 0 0
Biddle Regional County Park
 27 0 0
Chamisal Vineyards
Cayucos 		40 0 0
Center of Effort Winery
 75 0 0
Lopez Recreation Area
 100 0 0
Edna Valley Vineyards
 30 0 0
Playa Dulce
 35 0 0
Strasbaugh, INC
 200 1 0
Noll Properties
 100 0 0
Sycamore Mineral Springs Resort
 200 1 1
Slo Partners
 40 1 1
J M Sims Water Supply
 34 0 0
Waste Connections Water CO
 35 1 0
Fiero Lane Water Company, Inc.
 324 0 0
Octagon Barn Center Association
 200 0 0
Horizon Lane Water Supply
 32 0 0
Parsons Water Supply
 35 0 0
Vachell Water System
 150 1 1
Tmc Suburban, LLC
 25 0 0
Port San Luis Harbor District
 125 0 0
Holdgrafer & Associates
 30 0 0
141 Suburban Road Water Supply
 25 1 0
Paragon Triangle Water Supply
 50 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
Santa Margarita KOA
 70 0 0
Congregation Beth David
 25 0 0
Santa Margarita Recreation Area
 150 0 0
Santa Margarita Ranch Headquarters
Cayucos 		62 0 0
Montana de Oro State Park
 990 1 0
Granite Ridge
 50 0 0
Cerro Alto Campground
 30 1 0
Halfway Station
 25 1 0
Loading Chute
 25 1 0
Creston Elementary School
 100 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.