PlainWater

Boundary County, Idaho

SDWIS compliance plate

Sheet ID021 · Boundary County 20 sys · 1,933 viol · #2239/3254

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

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-HIGH 48.7% health
  • RANK-LOWER #2239/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-NONE No UCMR5 set
  • SRC-GW GW lead 70%
  • SYS-SMALL 20 systems
  • BOOK-MOST 6/7 fields

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

According to EPA SDWIS county population served used on /counties, Boundary County ranks #2,239 of 3,254 counties by people served, and #22 of 44 counties in Idaho. See methodology · corpus placement.

Boundary County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 48.7% is health-based share above the upper third (> 24.5%) . No UCMR5 tests in this extract for Boundary County . Population served ranks #2,239 of 3,254 · #22 of 44 in Idaho.

Flagged-rate neighbourhood around Boundary County

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

0% 20% 40% 60% 80% 100% Valley · lowest Camas · highest Bingham · near Minidoka · near 89.5% 100% 100% 100% 100% 100% 100%

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

Water Systems

Compare beyond Idaho

Mid-flagged peers for Boundary County

Cross-state counties nearest Boundary County on flagged-system share (100.0%) and cumulative violation count (1,933). 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.