Water Quality in Santa Rosa, CA (95403)
EPA violation data for public water systems serving ZIP code 95403.
Active Health Violations
4 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 95% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
45,806
Population
38
Water Systems
80
Violations (5yr)
4
Health-Based
Location
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Water Systems Serving This Area (38)
Santa Rosa, City Of
Petaluma, City Of
Rohnert Park, City Of
All resolvedHalf Moon Bay State Beach
Sonoma County Csa 41-Fitch Mountain
All resolvedSonoma County Csa 41-Salmon Creek
Sonoma County Csa 41-Jenner
All resolvedNorthwest Prep Charter School
1 health-basedSikh Gurdwara Santa Rosa
Sonoma County Csa 41-Freestone
Thornton Water System St Bch
Sonoma County Parks-Vet. Memorial Beach
Mobile Home Estates
1 health-basedPublic Health Clinic Buildings
Shamrock Mobile Home Park
Kashia
1 health-basedFoley Family Wines Chateau St. Jean
All resolvedCloverleaf Ranch Summer Camp
Saralee'S Vineyard And Tasting Room
Sonoma County Parks-Stillwater Cove
1 health-basedBlue Lakes Village
Mark West Neighborhood Church
Foley Sonoma Winery
Freemark Abbey Winery
Sonoma County Parks-Putnam Park
Lake Sonoma Marina
Sonoma County Parks-Riverfront Park
Campobello
Healdsburg Transfer Station
West Water Company (Puc)
Paradise Ridge Winery
Lokoya Winery
Sonoma County Parks-Pythian Trailhead
Csp Half Moon Bay State Park
Hidden Valley Food Mart
Half Moon Bay Sp Service Area
Sonoma County Office Of Emergency
Sonoma County Water Agency
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Used to disinfect water — generally safe at regulated levels.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
A naturally occurring element that can cause cancer and other health effects at high levels.
Annual water quality report delivery requirement.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Santa Rosa (95403) has more violations than 95% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 80.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.