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Counties → California

Solano County, California

SDWIS compliance plate

Sheet CA095 · Solano County 61 sys · 530 viol · #150/3254

VIOL-SEVERE · HEALTH-HIGH · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 82.0% flagged
  • HEALTH-HIGH 57.5% health
  • RANK-TOP #150/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-LOW 18.2% detect
  • SRC-GW GW lead 77%
  • SYS-MID 61 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Kings County ( -0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Solano County ranks #150 of 3,254 counties by people served, and #20 of 58 counties in California. See methodology · corpus placement.

Solano County standing, lower-flagged corpus third

Flagged-system rate 82.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 57.5% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 18.2% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #150 of 3,254 · #20 of 58 in California.

Flagged-rate neighbourhood around Solano County

Lowest/highest poles plus in-state counties nearest Solano County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Alpine · lowest Kings · near Sonoma · near Sutter · highest 70% 80.3% 81.8% 82% 83.6% 83.7% 97.1%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

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 -

Compare beyond California

Lower-flagged peers for Solano County

Cross-state counties nearest Solano County on flagged-system share (82.0%) and cumulative violation count (530). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - 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

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.