Columbia County, Washington
SDWIS compliance plate
Sheet WA013 · Columbia County 12 sys · 369 viol · #2829/3254
VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · ABOVE-PEER · PFAS-NONE · SRC-GW · SYS-SMALL · BOOK-MOST
- VIOL-SEVERE 83.3% flagged
- HEALTH-LOW 6.5% health
- RANK-BOTTOM #2829/3254
- ABOVE-PEER +1.0 pp
- PFAS-NONE No UCMR5 set
- SRC-GW GW lead 100%
- SYS-SMALL 12 systems
- BOOK-MOST 6/7 fields
Nearest flagged-rate peer: Benton County ( -1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Columbia County ranks #2,829 of 3,254 counties by people served, and #37 of 39 counties in Washington. See methodology · corpus placement.
Columbia County standing, lower-flagged corpus third
Flagged-system rate 83.3% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 6.5% is health-based share at or below the lower third (≤ 10.3%) . No UCMR5 tests in this extract for Columbia County . Population served ranks #2,829 of 3,254 · #37 of 39 in Washington.
Flagged-rate neighbourhood around Columbia County
Lowest/highest poles plus in-state counties nearest Columbia County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Dayton Water Department | 3,283 | 20 | - |
| Bluewood Ski Area | 532 | 14 | - |
| Lewis & Clark Trail State Park | 239 | 8 | - |
| Starbuck City Of | 147 | 233 | - |
| Camp Wooten State Park | 131 | 11 | - |
| Little Goose Dam | 60 | 27 | - |
| Lyons Ferry Marina | 54 | 29 | - |
| Touchet Valley Baptist Camp | 40 | 2 | - |
| Columbia Pulp I | 25 | 0 | - |
| Last Resort | 22 | 5 | - |
| Tucannon River Retreat | 7 | 0 | - |
| Shangri-La Ranch Park | 6 | 20 | - |
Compare beyond Washington
Lower-flagged peers for Columbia County
Cross-state counties nearest Columbia County on flagged-system share (83.3%) and cumulative violation count (369). 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. 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.