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Counties → California

Sacramento County, California

SDWIS compliance plate

Sheet CA067 · Sacramento County 166 sys · 2,206 viol · #24/3254

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

  • VIOL-SEVERE 88.0% flagged
  • HEALTH-HIGH 48.2% health
  • RANK-TOP #24/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 51.7% detect
  • SRC-GW GW lead 86%
  • SYS-LARGE 166 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Napa County (+ 0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Sacramento County ranks #24 of 3,254 counties by people served, and #8 of 58 counties in California. See methodology · corpus placement.

Sacramento County standing, lower-flagged corpus third

Flagged-system rate 88.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 48.2% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 51.7% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #24 of 3,254 · #8 of 58 in California.

Flagged-rate neighbourhood around Sacramento County

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

0% 20% 40% 60% 80% 100% Alpine · lowest San Francisco · near Napa · near Sutter · highest 70% 87.4% 87.5% 88% 88.1% 88.4% 97.1%

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

Water Systems

System Name Population Violations PFAS
City of Sacramento Main 520,407 4 Detected
Sacramento Suburban Water District 194,444 23 Detected
Scwa - Laguna/Vineyard 184,896 2 Detected
Folsom, City of - Main 80,969 8 Clean
Citrus Heights Water District 67,818 8 Clean
Cal Am - Suburban Rosemont 54,793 4 Detected
Cal Am - Parkway 50,573 3 Detected
Cal Am - Lincoln Oaks 48,094 2 Detected
Golden State Water Co. - Cordova 47,161 12 Clean
Elk Grove Water District 43,813 6 Detected
Sacramento International Airport [Sws] 41,717 2 Clean
Carmichael Water District 41,193 4 Detected
Fair Oaks Water District 36,226 0 Clean
Cal Am - Antelope 35,534 1 Clean
Scwa Mather-Sunrise 30,825 5 Clean
San Juan Water District 29,598 2 Clean
Galt, City Of 26,536 47 -
Orange Vale Water Company 16,861 6 Clean
Cal Am - Fruitridge Vista 15,652 8 Clean
Rio Linda/Elverta Community Water Dist 15,460 19 Detected
Scwa - Arden Park Vista 10,101 4 Detected
California State Fair 9,280 8 Detected
Florin County Water District 7,831 45 Detected
Folsom State Prison 7,502 4 Detected
Rancho Murieta Community Servi 5,728 13 Clean
Golden State Water Co - Arden Water Serv 5,658 6 Clean
Del Paso Manor County Water Di 4,854 5 Clean
Cal Am - Arden 4,191 2 Detected
Folsom, City of - Ashland 3,317 0 Clean
Gibson Ranch County Park 3,300 6 -
Northgate 880 [Sws] 2,926 2 -
Rio Cosumnes Correctional Center [Sws] 2,800 10 -
Metro Air Park Water System 2,500 3 -
American River College 2,000 18 -
Slavic Missionary Church Inc 1,800 33 -
Branch Center [Sws] 1,700 2 -
Cal Am - Isleton 1,693 1 -
Brannan Island State Rec. Area 1,622 5 -
Elkhorn I-5 Rest Area 1,000 0 -
Richard a. McGee Training Center 975 9 -
Church of Jesus Christ of Lds (Sws) 800 6 -
Mc Clellan MHP 700 11 -
Cal Am - Walnut Grove 667 2 -
Tokay Park Water Co 653 18 -
Franklin Elementary School 650 49 -
Grand Island Mansion 600 4 -
St Maria Goretti Parish (Sws) 600 1 -
Cosumnes River Elementary School 560 3 -
Rancho Seco Park 558 5 -
Arcohe Elem School - Main Campus 465 7 -

Compare beyond California

Lower-flagged peers for Sacramento County

Cross-state counties nearest Sacramento County on flagged-system share (88.0%) and cumulative violation count (2,206). 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.