County profile · EPA SDWIS + UCMR5
Washington County, Minnesota
195 SDWIS-listed public water systems serve 259,368 people in Washington County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 195
- SDWIS water systems Larger third of counties
- 1,652
- Total violations Middle third of counties
- 56.9%
- SDWIS systems w/ a violation Lower third of counties
- 91.7%
- UCMR5 PFAS rate (12 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet MN163 · Washington County 195 sys · 1,652 viol · #268/3254
VIOL-SEVERE · HEALTH-HIGH · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-LARGE · BOOK-FULL
- VIOL-SEVERE 56.9% flagged
- HEALTH-HIGH 66.0% health
- RANK-TOP #268/3254
- PHOTO-FINISH ±0.1 pp
- PFAS-HIGH 91.7% detect
- SRC-GW GW lead 100%
- SYS-LARGE 195 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Wadena County ( -0.1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Washington County ranks #268 of 3,254 counties by people served, and #5 of 87 counties in Minnesota. See methodology · corpus placement.
Washington County standing, lower-flagged corpus third
Flagged-system rate 56.9% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 66.0% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 91.7% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #268 of 3,254 · #5 of 87 in Minnesota.
Flagged-rate neighbourhood around Washington County
Lowest/highest poles plus in-state counties nearest Washington County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Minnesota
Lower-flagged peers for Washington County
Cross-state counties nearest Washington County on flagged-system share (56.9%) and cumulative violation count (1,652). 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.