Water Quality in Santa Rosa, CA (95476)
EPA violation data for public water systems serving ZIP code 95476.
Active Health Violations
9 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 81% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
35,196
Population
71
Water Systems
25
Violations (5yr)
9
Health-Based
Location
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Water Systems Serving This Area (71)
Santa Rosa, City Of
Groundwater 175,396 people served
0 violations
Napa, City Of
Surface water 84,804 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
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) ✓
American Canyon, City Of
Surface water 21,437 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Phelps Vineyards
Groundwater 19,412 people served
0 violations
Sonoma, City Of
Groundwater 11,725 people served
2 violations (5yr)
Moon Valley Water System
Groundwater 691 people served
0 violations
Diamond A Mutual Water Company
1 health-based Groundwater 640 people served
2 violations (5yr)
· 1 health-based
Cline Cellars
Groundwater 500 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
The Lodge At Sonoma
1 health-based Groundwater 300 people served
1 violation (5yr)
· 1 health-based · All resolved
Lead tested: 3.2 ppb (limit: 15 ppb) ✓
Kunde Winery
Groundwater 250 people served
0 violations
Sonoma Warehousing
Groundwater 200 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Presentation School
1 health-based Groundwater 200 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Viansa Winery
Groundwater 200 people served
0 violations
Nicholson Ranch Winery
Groundwater 150 people served
0 violations
Mission Highlands Mutual Water Co.
All resolved Groundwater 150 people served
1 violation (5yr)
· All resolved
Matanzas Creek Winery
Groundwater 139 people served
0 violations
Lead tested: 1.3 ppb (limit: 15 ppb) ✓
Boisset - Buena Vista Winery
Groundwater 122 people served
0 violations
Jacuzzi Winery
Groundwater 108 people served
0 violations
Gundlach Bundschu Winery
Groundwater 106 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Anaba Winery
Groundwater 105 people served
0 violations
Sonoma Creek Winery
Groundwater 100 people served
0 violations
Lazy D Cafe
Groundwater 100 people served
0 violations
C/O J. Hardy
Groundwater 100 people served
0 violations
Sonoma Valley Moose Lodge #2048
Groundwater 80 people served
0 violations
Kenwood Bpsc Llc
Groundwater 75 people served
0 violations
Train Town
Groundwater 75 people served
0 violations
Gloria Ferrer Caves
Groundwater 70 people served
0 violations
Wine Country Ind Park - Bldg C
Groundwater 70 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Sonoma Seventh Day Adventist Church
Groundwater 70 people served
0 violations
Kj Carneros Hills Winery
Groundwater 65 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Scribe Winery
Groundwater 62 people served
0 violations
Sangiacomo Winery
Groundwater 62 people served
0 violations
Groskopf Warehouse & Logistics
1 health-based Groundwater 60 people served
2 violations (5yr)
· 1 health-based
Donum Estate Water System
Groundwater 55 people served
0 violations
Buena Vista Winery, Inc.
Groundwater 50 people served
0 violations
Mumm Of Napa Valley
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Laura Chenel'S Chevre Inc.
1 health-based Groundwater 50 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fremont Diner
All resolved Groundwater 50 people served
1 violation (5yr)
· All resolved
Schellville Grill
Groundwater 50 people served
0 violations
Carneros Warehousing
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Bartholomew Foundation
Groundwater 50 people served
0 violations
Mark West School
Groundwater 50 people served
0 violations
S & W Warehousing, Llc
1 health-based Groundwater 50 people served
2 violations (5yr)
· 1 health-based
Kenwood Vineyards And Winery
All resolved Groundwater 50 people served
2 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Roche Family Winery
Groundwater 45 people served
0 violations
Arrowood Vineyards & Winery
Groundwater 44 people served
0 violations
Mayacamas Warehouse, Llc
1 health-based Groundwater 40 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 2150 ppb (limit: 1300 ppb)
Eighth Street East Partners
Groundwater 35 people served
0 violations
Hamel Family Wines
Groundwater 35 people served
0 violations
Ravenswood Winery
Groundwater 35 people served
0 violations
Speedway Sonoma Llc
1 health-based Groundwater under influence of surface water 33 people served
1 violation (5yr)
· 1 health-based · All resolved
Lead tested: 13 ppb (limit: 15 ppb) ✓
Leland Fly Fishing Outfitters
Groundwater 30 people served
0 violations
Schug Cellars
Groundwater 30 people served
0 violations
Buckley Family Partnership
Groundwater 30 people served
0 violations
Lead tested: 2.6 ppb (limit: 15 ppb) ✓
Wine Country Ind Park-Bldgs A&B
Groundwater 30 people served
0 violations
Fat Pilgrim General Store
Groundwater 30 people served
0 violations
General Hooker Park
Groundwater 30 people served
0 violations
The Rental Place
Groundwater 30 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Carneros Deli
Groundwater 29 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Sonoma Pacific Pallet Company
Groundwater 28 people served
0 violations
Westshore Apartments
Surface water 25 people served
0 violations
Eagle Ridge Winery
Groundwater 25 people served
0 violations
Ravenswood Winery
Groundwater 25 people served
0 violations
Oakville Grocery Co.
1 health-based Groundwater 25 people served
3 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Sonoma State Historic Park
Purchased surface water 25 people served
0 violations
Sonoma Sky Park
Groundwater 25 people served
0 violations
Westerbeke Ranch
Groundwater 25 people served
0 violations
Cherry Tree Store #2
Groundwater 25 people served
0 violations
U.S. Navy - Skaggs Island
Groundwater 0
0 violations
Contaminants Found
LEAD AND COPPER RULE REVISIONSHealth-Based
15 violations
Has active
ArsenicHealth-Based
A naturally occurring element that can cause cancer and other health effects at high levels.
3 violations
All resolved
Surface Water Treatment RuleHealth-Based
1 violation
All resolved
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
5 violations
All resolved
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit0 ppb measured
Action level: 15 ppb
Sampled: Jan 2025
Copper (Cu)
Exceeds limit2150 ppb measured
Action level: 1300 ppb
Sampled: Jul 2024
How Does This Compare?
Santa Rosa (95476) has more violations than 81% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 25.
Fewer violations 81th 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.