County profile · EPA SDWIS + UCMR5
Mason County, Kentucky
4 SDWIS-listed public water systems serve 25,305 people in Mason County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 4
- SDWIS water systems Smaller third of counties
- 491
- Total violations Lower third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- 100.0%
- UCMR5 PFAS rate (3 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet KY161 · Mason County 4 sys · 491 viol · #1547/3254
VIOL-SEVERE · HEALTH-LOW · RANK-MID · PHOTO-FINISH · PFAS-HIGH · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 7.7% health
- RANK-MID #1547/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 100.0% detect
- SRC-SW SW lead 75%
- SYS-TINY 4 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Jefferson County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Mason County ranks #1,547 of 3,254 counties by people served, and #48 of 118 counties in Kentucky. See methodology · corpus placement.
Mason 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 7.7% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,547 of 3,254 · #48 of 118 in Kentucky.
Flagged-rate neighbourhood around Mason County
Lowest/highest poles plus in-state counties nearest Mason County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Maysville Utility Commission | 11,263 | 178 | Detected |
| Western Lewis Rectorville Water District | 6,534 | 128 | Detected |
| Buffalo Trail Water Assoc | 4,514 | 81 | Detected |
| Western Mason Co Water District | 2,994 | 104 | - |
Compare beyond Kentucky
Mid-flagged peers for Mason County
Cross-state counties nearest Mason County on flagged-system share (100.0%) and cumulative violation count (491). 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.