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Counties → California

Plumas County, California

SDWIS compliance plate

Sheet CA063 · Plumas County 110 sys · 1,590 viol · #1285/3254

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

  • VIOL-SEVERE 80.0% flagged
  • HEALTH-HIGH 53.1% health
  • RANK-UPPER #1285/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 50.0% detect
  • SRC-GW GW lead 95%
  • SYS-MID 110 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Merced County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Plumas County ranks #1,285 of 3,254 counties by people served, and #51 of 58 counties in California. See methodology · corpus placement.

Plumas County standing, lower-flagged corpus third

Flagged-system rate 80.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 53.1% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,285 of 3,254 · #51 of 58 in California.

Flagged-rate neighbourhood around Plumas County

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

0% 20% 40% 60% 80% 100% Alpine · lowest Marin · near Plumas · this county Sutter · highest 70% 79.1% 79.6% 79.8% 80% 80.3% 97.1%

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

Water Systems

System Name Population Violations PFAS
Lake Almanor Country Club MWC 6,000 6 Clean
American Valley Csd 3,778 15 Detected
Chester Public U.d. 2,187 13 -
City of Portola 2,100 44 -
Hamilton Branch Csd 1,874 7 -
Plumas Eureka Csd 1,534 99 -
West Almanor M.W.C. 1,394 6 -
Grizzly Lake Csd-Delleker 1,314 103 -
Plumas-Eureka S.p. 800 10 -
Whitehawk Ranch MWC 765 9 -
Feather River RV & MHP 741 3 -
Graeagle Water Company 737 4 -
Ivcsd-Greenville 630 69 -
Feather River Community College 600 8 -
Caltrans-Massack Rest Stop 350 6 -
Pg&e Rocky Point Cg 312 4 -
Oakland Feather River Camp 300 32 -
Sierra Pacific Industries Quincy 300 8 -
Grizzly Creek Ranch Snj 300 10 -
Greenhorn Creek Csd 280 6 -
Ivcsd Crescent Mills 258 6 -
Lower Bucks Lake Lds Camp 220 0 -
Grizzly Lake Csd-Crocker/Welch 215 55 -
Caltrans-L.t. Davis Reststop 200 34 -
Waltons Grizzly Lodge 200 0 -
Bucks Lakeshore Resort 200 15 -
Blairsden Water Users Assn 200 57 -
Associations of Thompson Lake 182 17 -
Pg&e Ponderosa Flat Cg 150 0 -
Pg&e Haskins Valley Cg 150 0 -
Coppercreek Campground 150 0 -
Clio Rivers Edge RV Park 150 3 -
Walker Ranch Csd 150 2 -
Two Rivers Sport Camp 150 12 -
Gold Mountain Csd 135 8 -
Caltrans-Chester Safety Rest Stop 120 6 -
Pnf Kenzie Ravine 1 & 2 120 11 -
Lake Cove Resort 120 4 -
Grizzly Ranch Csd 102 0 -
Pnf Grasshopper / Grizzly Cgs 100 5 -
Little Bear RV Park 100 0 -
Pnf Mt Hough Ranger Station 100 12 -
North Shore Cg 100 6 -
Plumas Pines Resort 100 0 -
Uc Berkeley Forestry Camp 100 12 -
Brewing Lair 100 0 -
Camp Timberwolf 90 7 -
Pnf Lighting Tree Cg 90 15 -
Pnf Big Cove Cg 80 49 -
Clio Public Utility District 79 17 -

Compare beyond California

Lower-flagged peers for Plumas County

Cross-state counties nearest Plumas County on flagged-system share (80.0%) and cumulative violation count (1,590). 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.