Tapcensus

Water quality in Ukiah, California

Ukiah is in Mendocino County. 148 active public water systems serve the county; 23 had an EPA violation in the past three years.

Most likely your provider

Rogina Water Company Inc. CA2310002 · Community water system · Ground water
Serves 2,554 people Rules violated, past 3 years 1 Unresolved 1 Last sanitary survey Jun 26, 2025 Distance 1.3 mi
View system details EPA facility report

Other community water systems in Mendocino County

41 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Ukiah, City of
Ukiah		 16,067 1 1.5 mi
City of 10,000 Buddhas
Ukiah		 200 1 1.5 mi
Willow County Water District
 3,797 1 2.9 mi
Yokayo Tribe of Indians
 75 2 3.7 mi
Millview County Water District
 5,500 0 3.8 mi
Calpella County Water District
 548 0 6.3 mi
River Estates Mutual Water Company
 250 1 6.5 mi
Lake View Mutual Water Co.
 90 0 7.1 mi
Redwood Valley County Water District
 5,200 0 9.9 mi
Hopland Public Utility District
 1,076 0 12.2 mi
Meadow Estates Mutual
 100 0 13.4 mi
Ridgewood Water System
 265 0 14.0 mi
Pine Mountain Mutual Water Co.
 310 2 17.1 mi
Willits, City of
Willits		 6,175 0 20.2 mi
Little Lake Mobile Home Park
 38 0 22.4 mi
Brooktrails Township Csd
 3,632 0 25.3 mi
Creekside Cabins & RV Resort
 124 2 26.6 mi
Irish Beach Water District
 254 1 27.4 mi
Elk County Water District
 207 1 28.5 mi
North Gualala Water Company
 3,508 0 30.5 mi
Point Arena Water Works
 459 1 31.5 mi
Woods, the (mendocino)
 153 0 31.7 mi
Albion Mutual Water Company
 26 1 31.7 mi
Big River Vista Mutual Water Company
 36 0 34.2 mi
Hills Ranch Mutual Water Company
 79 0 34.6 mi
All 42 community water systems in Mendocino County
Non-community systems in Mendocino County (106: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
U.s. Army Corps-Lake Mendo (marina Site)
 200 0 0
U.s. Army Corps-Lake Mendo (bushay Site)
 2,000 0 0
U.s. Army Corps-Lake Mendo (pomo Site)
 300 0 0
U.s. Army Corps-Lake Mendo (kyen Cmpgrd)
 1,500 0 0
Flight Ridge
 206 0 0
Orr Springs Resort
 84 0 0
Fetzer Vineyards
 126 0 0
Potter Valley School District
 309 1 1
Anderson Valley Brewing Company
 47 1 0
Offstreet Studios
 25 0 0
Anderson Valley Elementary School
 350 0 0
Boonville Hotel
 25 0 0
Redwood Drive-In
 25 0 0
Mendocino County Fairgrounds
 500 0 0
Ray's Station Winery
 134 0 0
Anderson Valley High School
 300 0 0
Pennyroyal Farm
 37 0 0
Anderson Valley Health Center
 25 0 0
The Madrones
 91 0 0
Goldeneye Winery
 63 0 0
I & E Lath Mill
 31 0 0
Lemons' Market
 150 0 0
The Land
 50 0 0
Csp-Hendy Woods State Park
 236 0 0
Blackbird Farm
 25 0 0
Navarro Vineyards
 112 0 0
Roederer Estate Winery
 25 0 0
Wente Scout Reservation
 422 0 0
Camp Navarro
 284 0 0
Cdf-Chamberlain Creek Conservation Camp
 110 1 1
Camp Mendocino
 321 0 0
Mendocino School District-Albion School
 25 0 0
Lighthouse Pointe
 61 0 0
Manchester Beach KOA
 273 0 0
Cdf-Parlin Fork Conservation Camp
 55 0 0
Csp-Manchester State Park
 420 0 0
Moss Cove Rest Stop (caltrans)
 400 0 0
Csp-Mendocino Woodlands
 400 0 0
Albion Field Station
 154 0 0
Seafoam Lodge
 56 0 0
Pacific Reefs Water District
 25 0 0
Mendocino Coast Lodge
 48 0 0
Point Arena Lighthouse
 25 0 0
Sea Rock Inn
 54 0 0
Inn at Schoolhouse Creek
 77 0 0
Little River Inn
 95 0 0
Csp-Van Damme State Park
 2,004 0 0
Albion River Campground
 425 0 0
Irvine Lodge Rest Stop (caltrans)
 300 0 0
Mendocino Inn and Farm B
 27 0 0
All non-community systems
About this data

Water systems are matched to Mendocino County, nearest to Ukiah 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.

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.