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Counties → California

Placer County, California

SDWIS compliance plate

Sheet CA061 · Placer County 123 sys · 1,542 viol · #165/3254

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

  • VIOL-SEVERE 83.7% flagged
  • HEALTH-MID 21.5% health
  • RANK-TOP #165/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-LOW 8.3% detect
  • SRC-GW GW lead 75%
  • SYS-LARGE 123 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Placer County ranks #165 of 3,254 counties by people served, and #22 of 58 counties in California. See methodology · corpus placement.

Placer County standing, lower-flagged corpus third

Flagged-system rate 83.7% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 21.5% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 8.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #165 of 3,254 · #22 of 58 in California.

Flagged-rate neighbourhood around Placer County

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

0% 20% 40% 60% 80% 100% Alpine · lowest Sonoma · near Nevada · near Sutter · highest 70% 82% 83.6% 83.7% 84.5% 85.5% 97.1%

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

Water Systems

System Name Population Violations PFAS
City of Roseville 155,612 7 Clean
Placer Cwa - Foothill 89,544 0 Clean
City of Lincoln 54,538 0 Detected
Placer Cwa - Auburn/Bowman 27,294 0 Clean
Northstar C.s.d. 15,452 6 Clean
Cal Am - West Placer 8,861 0 Clean
Nevada ID - North Auburn 6,870 0 Clean
Foresthill Public Utility Dist 6,782 2 Clean
North Tahoe PUD - Main 6,321 12 Clean
Tahoe City PUD - Main 5,661 14 Clean
Northstar Csd - Martis Valley 4,493 0 -
Meadow Vista Cwd 4,183 0 Clean
Tahoe City PUD - Tahoe Swiss Village 3,363 12 -
Placer Cwa - Colfax 3,149 0 -
Fulton Water Company 2,593 41 -
Agate Bay Water Company 2,500 94 -
Alpine Springs County Water District 2,200 3 -
Northstar Summit Deck & Grill 2,000 16 -
Christian Valley Park Csd 1,800 6 -
Pcwa - Weimar 1,689 4 -
Palisades Tahoe 8200 Water System 1,500 54 Clean
Midway Heights C. W. D. 1,491 82 -
Olympic Valley Psd 1,165 1 -
Loomis Community Park 1,000 5 -
Cisco Grove Campground & RV Park 920 14 -
McKinney Water District 853 3 -
Tahoe City PUD - McKinney/Quail 844 2 -
Sierra Lakes County Water Dist 824 2 -
Tahoe City PUD - Tahoe Cedars 793 20 -
Olympic Valley MWC 756 14 -
Tahoe Park Water Company 750 26 -
Placer Cwa - Alta 748 3 -
Placer CSA - Sheridan 653 4 -
North Tahoe PUD - Carnelian Woods 524 4 -
Indian Creek Golf Course 512 11 -
North Tahoe PUD - Dollar Cove 507 4 -
Usfs French Meadows South Shore 500 29 -
Usfs French Meadows North Shore 500 27 -
Lakeview Hills Community Assoc 499 5 -
Hidden Valley Community Association 499 4 -
Nyack Water System 450 15 -
Ward Well Water Company 425 5 -
Morning Star Lake Resort 400 4 -
Folsom Lake Mutual Water Co 333 0 -
Rainbow Springs Public Water System 300 15 -
Tahoe City PUD - Madden Creek 300 7 -
Talmont Resort Improvement District 300 15 -
Auburn Valley Community Service Dis 290 11 -
Ophir Elementary School Water System 260 31 -
Heather Glen Community Service Dist 250 32 -

Compare beyond California

Lower-flagged peers for Placer County

Cross-state counties nearest Placer County on flagged-system share (83.7%) and cumulative violation count (1,542). 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.