Tapcensus

Water quality in Monte Rio, California

Monte Rio is in Sonoma County. 445 active public water systems serve the county; 76 had an EPA violation in the past three years.

Most likely your provider

Sweetwater Springs Cwd Monte Rio CA4910028 · Community water system · Ground water
Serves 3,531 people Rules violated, past 3 years 0 Last sanitary survey Oct 19, 2021 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 Sonoma County

128 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Austin Acres Mutual Water Company
 82 0 1.3 mi
Magic Mountain Mutual Water Company
 171 0 1.5 mi
Austin Creek Mutual (springhill)
 150 0 2.0 mi
Huckleberry Mutual Water Company
 45 1 2.0 mi
Sonoma County Mutual Water Company
 40 0 2.6 mi
Sweetwater Springs Cwd Guerneville
 5,156 0 2.8 mi
Rancho del Paradiso-Cal Water Svc (puc)
 110 0 2.8 mi
Redwood Heights Mutual Water Company
 30 1 2.8 mi
Sunrise Mountain Mutual Water Company
 100 0 3.2 mi
Armstrong Valley-Cal Water Service (puc)
 539 0 3.4 mi
Alliance Redwoods Conference Grounds
 46 1 3.9 mi
Noel Heights-Cal Water Service (puc)
 86 0 3.9 mi
Larkin Woods Mutual Water Company
 34 0 4.6 mi
Odd Fellows Recreation Club
 557 0 4.7 mi
Bridgehaven Park
 30 2 4.9 mi
Camp Meeker Water System
 1,171 0 5.0 mi
Hilton Mutual Water Company
 36 1 5.0 mi
Sonoma County Csa 41-Jenner
 406 0 5.2 mi
Cazadero Water Company, Inc. (puc)
 525 3 5.3 mi
Russian River County Water District
 4,150 0 6.0 mi
Occidental Community Services District
 383 0 6.2 mi
Sereno del Mar Water Company (puc)
 375 0 6.4 mi
Forestville Water District
 3,717 1 7.1 mi
Carmet by the Sea Water Company
 188 0 7.4 mi
Bodega Water Company
 77 0 8.7 mi
All 129 community water systems in Sonoma County
Non-community systems in Sonoma County (316: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Casini Ranch Campground
 442 0 0
Blue Heron Restaurant
 50 1 1
Duncans Mills Trading Company
 45 0 0
Duncans Mills Camping Club
 127 0 0
Johnson's Beach Resort
 200 0 0
Westminster Woods Camp
 18 1 1
East Austin Creek Mutual Water Company
 32 0 0
Camp Royaneh
 70 0 0
Gurdjieff Foundation
 40 0 0
Korbel Brothers Winery
 296 0 0
Csp-Armstrong Redwoods State Reserve
 611 0 0
Cazadero Performing Arts Camp
 301 0 0
Mount Gilead Bible Conference
 64 1 1
River Bend Resort
 255 0 0
Csp-Goat Rock State Beach
 402 0 0
Occidental Arts & Ecology Center
 51 2 1
Csp-Wrights Beach State Park
 502 0 0
Union Hotel
 350 0 0
Catholic Charities Cyo Camp
 250 0 0
Moshin Vineyards
 30 0 0
Gary Farrell Winery
 106 0 0
Padmasambhava Peace Institute
 28 0 0
Russian River Vineyards & Restaurant
 157 0 0
Crowell King Ridge, LLC
 76 0 0
Salmon Creek Middle School
 300 2 0
Ektimo Vineyards
 57 0 0
Azure Acres CD Recovery Center
 30 0 0
Dutton Farmworker Housing
 38 0 0
Vca Forestville Animal Hospital
 26 0 0
Traditional Medicinals, Inc.
 120 0 0
Manzana Products Company, Inc.
 175 0 0
Mom's Apple Pie
 40 0 0
Thomas George Estates Winery
 25 0 0
Graton Commerce Center
 30 0 0
Sebastopol Vineyards
 156 0 0
Williams Selyem Winery
 25 0 0
Plumfield Academy School (occidental Rd)
 30 0 0
Fort Ross Vineyard
 100 0 0
Char Vale Vineyards
 25 0 0
Chaos Vineyards, Llc.
 50 0 0
Oak Grove School
 500 1 1
Furthermore Wines Water System
 27 0 0
Gracianna Winery
 64 0 0
Dutton Ranch Corporation
 75 0 0
Russian River Winery
 73 0 0
Sonoma County Parks-Riverfront Park
 50 0 0
Bucher Water Company
 52 1 1
Hop Kiln Winery
 150 0 0
Rochioli Winery
 26 0 0
Childkind Laguna Preschool
 42 0 0
All non-community systems
About this data

Water systems are matched to Sonoma County, nearest to Monte Rio 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.