PlainWater
Counties → California

Solano County, California

Water Systems
61
Population Served
470,297
Total Violations
530
305 health-based
PFAS Detected
7
of 11 tested

Violation Analysis

82.0%
Systems with Violations
8.7
Avg Violations per System
57.5%
Health-Based Violations

Water Source Types

GW
38 systems (62%)
SW
12 systems (20%)

PFAS Contamination

11
Systems Tested
7
PFAS Detected
63.6%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Solano California water systems by violation status, EPA SDWIS records.

No violations on record (8) One or more violations (42)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
City of Vallejo 121,420 12 Clean
City of Fairfield 120,377 8 Clean
City of Vacaville 97,000 7 Detected
Suisun-Solano Water Authority 29,105 24 Clean
City of Benicia 27,131 7 Detected
California Water Service Co.-Travis Afb 18,111 20 Clean
City of Dixon 12,540 4 Clean
California Water Service Co. - Dixon 10,623 3 Clean
City of Rio Vista 10,489 13 Clean
California State Prison - Solano 5,100 10 Clean
Hunter Hill Safety Roadside Rest Area 3,707 10 -
City of Vallejo-Lakes System 2,800 6 Clean
Rural North Vacaville Water District 1,313 0 -
Self-Serve Petroleum 1,210 22 -
Valley Evangelical Free Church 1,200 7 -
Lake Solano Park 1,019 0 -
Rush Ranch Open Space 656 0 -
Vineyard RV Park 550 3 -
Sid - Gibson Canyon 535 4 -
Rockwell Collins Inc. (Fka Upco-Utas) 477 7 -
Dixon Migrant Center 346 2 -
Mariani Packing Company, Inc. 300 1 -
Sid - Elmira 290 1 -
Gill Sidhu Chevron 255 2 -
Wooden Valley Winery 250 8 -
Connection Point Church 202 0 -
Campbell Soup Dixon 186 3 -
Northbay Logistics Center Fka Savemart 180 2 -
Neil's Service Center 170 3 -
Superior Packing Co 164 3 -
Moose Lodge 1967 159 10 -
Punjabi Dhaba 155 10 -
Hines Nurseries Winters North 150 3 -
Dixon 76 149 17 -
Sid - Quail Canyon 132 0 -
Snug Harbor RV LP 125 93 -
Pedrick Produce 120 11 -
West Wind Winery 103 24 -
Hastings Island Hunting Preserve 100 2 -
Midway Foods 100 4 -
Birds Landing Hunting Preserve 100 4 -
Hines Nursery Winters South 100 2 -
Blue Victorian Winery 100 0 -
Sid - Pleasant Hills Ranch 89 16 -
Hidden Acres Trailer Villa 80 49 -
Caymus Cordelia Winery 75 0 -
Easterly WWTP - Vacaville 70 0 -
Delta Conservation Camp 65 1 -
Harris Moran Seed Company 64 1 -
Sid - Blue Ridge Oaks 63 1 -

Other Counties in California

Los Angeles County
276 systems · 10,109,089 served · 3,972 violations
San Diego County
197 systems · 3,744,323 served · 4,832 violations
Orange County
46 systems · 3,201,893 served · 507 violations
Riverside County
201 systems · 2,839,125 served · 6,103 violations
San Bernardino County
318 systems · 2,830,626 served · 4,611 violations
Alameda County
27 systems · 2,249,634 served · 275 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Solano County? ▼
Solano County has 530 total drinking water violations across 61 water systems, of which 305 are health-based violations. 82.0% of systems have at least one violation.
How many people get water from Solano County systems? ▼
Water systems in Solano County serve approximately 470,297 people through 61 public water systems.
Has PFAS been detected in Solano County water? ▼
Of 11 water systems tested for PFAS in Solano County, 7 had PFAS detected (63.6% detection rate).
What types of water sources supply Solano County? ▼
Water systems in Solano County use GW (38 systems), SW (12 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 57.5% of Solano County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.