County profile · EPA SDWIS + UCMR5
Jefferson County, Ohio
35 SDWIS-listed public water systems serve 58,488 people in Jefferson County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 35
- SDWIS water systems Middle third of counties
- 1,923
- Total violations Middle third of counties
- 91.4%
- SDWIS systems w/ a violation Lower third of counties
- 60.0%
- UCMR5 PFAS rate (5 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet OH081 · Jefferson County 35 sys · 1,923 viol · #856/3254
VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 91.4% flagged
- HEALTH-MID 27.4% health
- RANK-UPPER #856/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 60.0% detect
- SRC-GW GW lead 86%
- SYS-SMALL 35 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Coshocton County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Jefferson County ranks #856 of 3,254 counties by people served, and #41 of 88 counties in Ohio. See methodology · corpus placement.
Jefferson County standing, lower-flagged corpus third
Flagged-system rate 91.4% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 27.4% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 60.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #856 of 3,254 · #41 of 88 in Ohio.
Flagged-rate neighbourhood around Jefferson County
Lowest/highest poles plus in-state counties nearest Jefferson County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Ohio
Lower-flagged peers for Jefferson County
Cross-state counties nearest Jefferson County on flagged-system share (91.4%) and cumulative violation count (1,923). 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.