PlainWater

Pend Oreille County, Washington

SDWIS compliance plate

Sheet WA051 · Pend Oreille County 44 sys · 1,579 viol · #2250/3254

VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-MID · BOOK-MOST

  • VIOL-SEVERE 93.2% flagged
  • HEALTH-LOW 19.7% health
  • RANK-LOWER #2250/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-NONE No UCMR5 set
  • SRC-GW GW lead 89%
  • SYS-MID 44 systems
  • BOOK-MOST 6/7 fields

Nearest flagged-rate peer: Chelan County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Pend Oreille County ranks #2,250 of 3,254 counties by people served, and #35 of 39 counties in Washington. See methodology · corpus placement.

Pend Oreille County standing, mid-flagged corpus third

Flagged-system rate 93.2% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 19.7% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Pend Oreille County . Population served ranks #2,250 of 3,254 · #35 of 39 in Washington.

Flagged-rate neighbourhood around Pend Oreille County

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

0% 20% 40% 60% 80% 100% Grant · lowest Clark · near Chelan · near Wahkiakum · highest 69.8% 92.8% 93.1% 93.2% 93.2% 93.5% 100%

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

Water Systems

Compare beyond Washington

Mid-flagged peers for Pend Oreille County

Cross-state counties nearest Pend Oreille County on flagged-system share (93.2%) and cumulative violation count (1,579). 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
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.