County profile · EPA SDWIS + UCMR5
Marshall County, Oklahoma
7 SDWIS-listed public water systems serve 25,259 people in Marshall County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 7
- SDWIS water systems Smaller third of counties
- 1,553
- Total violations Middle third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- 0.0%
- UCMR5 PFAS rate (2 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet OK095 · Marshall County 7 sys · 1,553 viol · #1550/3254
VIOL-SEVERE · HEALTH-MID · RANK-MID · PHOTO-FINISH · PFAS-CLEAN · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-MID 42.9% health
- RANK-MID #1550/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-SW SW lead 57%
- SYS-TINY 7 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Tulsa County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Marshall County ranks #1,550 of 3,254 counties by people served, and #31 of 77 counties in Oklahoma. See methodology · corpus placement.
Marshall 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 42.9% is health-based share above the upper 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 #1,550 of 3,254 · #31 of 77 in Oklahoma.
Flagged-rate neighbourhood around Marshall County
Lowest/highest poles plus in-state counties nearest Marshall County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Marshall County Rural Water District #2 | 17,587 | 206 | Clean |
| Madill | 3,410 | 264 | Clean |
| Kingston PWA | 1,600 | 51 | - |
| Oakland PWA | 1,050 | 188 | - |
| Oakview Water Corp | 925 | 475 | - |
| Cardinal Hill Subdivision | 475 | 186 | - |
| Texoma Hills | 212 | 183 | - |
Compare beyond Oklahoma
Mid-flagged peers for Marshall County
Cross-state counties nearest Marshall County on flagged-system share (100.0%) and cumulative violation count (1,553). 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.