County profile · EPA SDWIS + UCMR5
Calaveras County, California
52 SDWIS-listed public water systems serve 56,388 people in Calaveras County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 52
- SDWIS water systems Larger third of counties
- 1,548
- Total violations Middle third of counties
- 96.2%
- SDWIS systems w/ a violation Middle third of counties
- 0.0%
- UCMR5 PFAS rate (7 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet CA009 · Calaveras County 52 sys · 1,548 viol · #887/3254
VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 96.2% flagged
- HEALTH-LOW 17.3% health
- RANK-UPPER #887/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 73%
- SYS-MID 52 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: San Mateo County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Calaveras County ranks #887 of 3,254 counties by people served, and #44 of 58 counties in California. See methodology · corpus placement.
Calaveras County standing, mid-flagged corpus third
Flagged-system rate 96.2% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 17.3% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #887 of 3,254 · #44 of 58 in California.
Flagged-rate neighbourhood around Calaveras County
Lowest/highest poles plus in-state counties nearest Calaveras County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond California
Mid-flagged peers for Calaveras County
Cross-state counties nearest Calaveras County on flagged-system share (96.2%) and cumulative violation count (1,548). 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.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.