Water Quality in Santa Rosa, CA (95448)
EPA violation data for public water systems serving ZIP code 95448.
Active Health Violations
2 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 78% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
16,077
Population
103
Water Systems
21
Violations (5yr)
2
Health-Based
Location
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Water Systems Serving This Area (103)
Santa Rosa, City Of
Groundwater 175,396 people served
0 violations
Petaluma, City Of
Groundwater 60,781 people served
0 violations
Rohnert Park, City Of
All resolved Groundwater 43,821 people served
2 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Healdsburg, City Of
Groundwater under influence of surface water 10,985 people served
0 violations
Colonial Park
Groundwater 342 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Bacchus Landing Cellars
All resolved Groundwater 250 people served
1 violation (5yr)
· All resolved
Alexander Valley Union School District
Groundwater 200 people served
0 violations
Silver Oak Wine Cellars
1 health-based Groundwater 188 people served
3 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Rio Lindo Adventist Academy
All resolved Groundwater under influence of surface water 178 people served
2 violations (5yr)
· All resolved
West Side Union School District
Groundwater 175 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Rodney Strong Vineyards
Groundwater 160 people served
0 violations
Macrostie Winery And Vineyard
Groundwater 150 people served
0 violations
Thunderbird Ranch
Groundwater 150 people served
0 violations
Ferrari-Carano Winery
1 health-based Groundwater 142 people served
2 violations (5yr)
· 1 health-based
Courtside Cellars
Groundwater 125 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
E & J Gallo Winery-Sonoma
Groundwater 124 people served
0 violations
Gary Farrell Winery
Groundwater 106 people served
0 violations
Silver Oak Wine Cellars Llc
Groundwater 91 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Hoot Owl Creek/Alex. Valley Vineyards Jv
Groundwater 91 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Stonestreet Winery
Groundwater 90 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Ramey Vineyards
Groundwater 90 people served
0 violations
Russian River Mutual Water Co.
All resolved Groundwater 87 people served
1 violation (5yr)
· All resolved
Jordan Vineyard & Winery
Groundwater 75 people served
0 violations
J Vineyards & Winery
Groundwater 75 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Vino Farms, Inc. - Preston Ranch
Groundwater 72 people served
0 violations
Asti Winery
Groundwater under influence of surface water 67 people served
0 violations
Chateau Diana
Groundwater 64 people served
0 violations
Gracianna Winery
Groundwater 64 people served
0 violations
Stuhlmuller Vineyards
Groundwater 61 people served
0 violations
Rack & Riddle Custom Wine Services
Groundwater 61 people served
0 violations
Flowers Winery
Groundwater 60 people served
0 violations
Soda Rock Winery - Inactive Since 1993
Groundwater 60 people served
0 violations
Dry Creek Store
Groundwater 60 people served
0 violations
Preston Winery
Groundwater 55 people served
0 violations
Comstock Winery
Groundwater 55 people served
0 violations
Chalk Hill Winery
Groundwater 55 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
E String Cellars
Groundwater 54 people served
0 violations
Amista Vineyards
Groundwater 51 people served
0 violations
Covin Water System
Groundwater 51 people served
0 violations
Williamson Wines
Groundwater 50 people served
0 violations
Chaos Vineyards, Llc.
Groundwater 50 people served
0 violations
Trinite Estate Winery
Groundwater 50 people served
0 violations
Da Vero Farms
Groundwater 50 people served
0 violations
Mendez Water System
Groundwater 50 people served
0 violations
Michel-Schlumberger Fine Wine Estate
Groundwater 50 people served
0 violations
Dry Creek Vineyard
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Capital Lumber Company
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Bacigalupi Vineyards
Groundwater 49 people served
0 violations
Healdsburg Convalescent Hospital
Groundwater 46 people served
0 violations
Lancaster Estate Winery
Groundwater 46 people served
0 violations
Bella Vineyards And Wine Caves
Groundwater 45 people served
0 violations
Twomey Cellars
All resolved Groundwater 43 people served
1 violation (5yr)
· All resolved
Zichichi Winery
Groundwater 41 people served
0 violations
Mauritson Family Winery
Groundwater 40 people served
0 violations
Gaver Vineyard/Farmworker House #1
Groundwater 40 people served
0 violations
Overshine Wine Company
Groundwater 40 people served
0 violations
Verite Winery
Groundwater 38 people served
0 violations
Lambert Bridge Winery
Groundwater 38 people served
0 violations
Seghesio Farms
All resolved Groundwater 38 people served
1 violation (5yr)
· All resolved
Mauritson Labor House
Groundwater 37 people served
0 violations
Vino Farms, Inc. - Wasson Ranch
Groundwater 35 people served
0 violations
Ovid Napa Valley
All resolved Groundwater 35 people served
1 violation (5yr)
· All resolved
Saini Winery
Groundwater 35 people served
0 violations
Jimtown And Then Sum
Groundwater 35 people served
0 violations
Alexander Valley Store & Bar
Groundwater 35 people served
0 violations
Truett & Hurst Winery
Groundwater 35 people served
0 violations
Good Beginnings
Groundwater 35 people served
0 violations
Madrona Manor
Groundwater 34 people served
0 violations
Aperture Cellars
Groundwater 33 people served
0 violations
Quivira Vineyards
Groundwater under influence of surface water 31 people served
3 violations (5yr)
Lead tested: 3.5 ppb (limit: 15 ppb) ✓
Hawkes Winery
Groundwater 30 people served
0 violations
Zialena Winery
Groundwater 30 people served
0 violations
Plum Water Company
Groundwater 30 people served
0 violations
Wilson Winery
Groundwater 30 people served
0 violations
Bucher Water Company
Groundwater 30 people served
3 violations (5yr)
Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 2140 ppb (limit: 1300 ppb)
Macdonald Bunkhouse
All resolved Groundwater 30 people served
1 violation (5yr)
· All resolved
Matrix Winery
Groundwater 30 people served
0 violations
Moshin Vineyards
Groundwater 30 people served
0 violations
Raford House
Groundwater 30 people served
0 violations
Nalle Winery
Groundwater 29 people served
0 violations
Alexander Valley Store & Bar
Groundwater 27 people served
0 violations
Alexander Valley Acres Water Company
Groundwater 27 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Rochioli Winery
Groundwater 26 people served
0 violations
Giorgio S Restaurant
Groundwater 26 people served
0 violations
Copain Wine Cellars
Groundwater 26 people served
0 violations
Timber Crest Farms
Groundwater 26 people served
0 violations
Dry Creek Vineyard, Inc
Groundwater 25 people served
0 violations
Passalacqua Winery
Groundwater 25 people served
0 violations
Williams Selyem Winery
Groundwater 25 people served
0 violations
Lead tested: 3.3 ppb (limit: 15 ppb) ✓
Thomas George Estates Winery
Groundwater 25 people served
0 violations
Sausal Winery
Groundwater 25 people served
0 violations
Teldeschi Cellars
Groundwater 25 people served
0 violations
Mazzocco Winery
Groundwater 25 people served
0 violations
Roth Winery
Groundwater 25 people served
0 violations
P G & E Construction Camp
Groundwater 25 people served
0 violations
Mill Creek Vineyards
Groundwater 25 people served
0 violations
Pg&E Geysers Power Plant-West Admin
Groundwater under influence of surface water 25 people served
0 violations
Johnson'S Alex Valley Winery
Groundwater 25 people served
0 violations
Hanna Vineyards
Groundwater 16 people served
0 violations
Rued Vineyards
Groundwater 10 people served
0 violations
Bucher Water
Groundwater 0
0 violations
P G & E Administration Ctr
Groundwater 0
0 violations
Sotoyome Heights Mutual Water Company
Groundwater 0
0 violations
Contaminants Found
LEAD AND COPPER RULE REVISIONSHealth-Based
4 violations
Has active
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
9 violations
All resolved
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
6 violations
Has active
ArsenicMonitoring
A naturally occurring element that can cause cancer and other health effects at high levels.
1 violation
All resolved
E. COLIMonitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit0 ppb measured
Action level: 15 ppb
Sampled: Jan 2025
Copper (Cu)
Exceeds limit2140 ppb measured
Action level: 1300 ppb
Sampled: Jan 2024
How Does This Compare?
Santa Rosa (95448) has more violations than 78% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 21.
Fewer violations 78th percentile More violations
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
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.