County profile · EPA SDWIS + UCMR5
Washington County, Pennsylvania
33 SDWIS-listed public water systems serve 46,691 people in Washington County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 33
- SDWIS water systems Middle third of counties
- 7,539
- Total violations Upper third of counties
- 90.9%
- SDWIS systems w/ a violation Lower third of counties
- 0.0%
- UCMR5 PFAS rate (3 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet PA125 · Washington County 33 sys · 7,539 viol · #1002/3254
VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 90.9% flagged
- HEALTH-LOW 13.5% health
- RANK-UPPER #1002/3254
- PHOTO-FINISH ±0.3 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 48%
- SYS-SMALL 33 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Lawrence County ( -0.3 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Washington County ranks #1,002 of 3,254 counties by people served, and #42 of 68 counties in Pennsylvania. See methodology · corpus placement.
Washington County standing, lower-flagged corpus third
Flagged-system rate 90.9% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 13.5% 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 #1,002 of 3,254 · #42 of 68 in Pennsylvania.
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 Pennsylvania
Lower-flagged peers for Washington County
Cross-state counties nearest Washington County on flagged-system share (90.9%) and cumulative violation count (7,539). 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.