Marion County, Missouri
SDWIS compliance plate
Sheet MO127 · Marion County 3 sys · 196 viol · #1534/3254
VIOL-SEVERE · HEALTH-HIGH · RANK-MID · PHOTO-FINISH · PFAS-HIGH · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-HIGH 49.0% health
- RANK-MID #1534/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 66.7% detect
- SRC-SW SW lead 67%
- SYS-TINY 3 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Cass County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Marion County ranks #1,534 of 3,254 counties by people served, and #36 of 115 counties in Missouri. See methodology · corpus placement.
Marion 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 49.0% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 66.7% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,534 of 3,254 · #36 of 115 in Missouri.
Flagged-rate neighbourhood around Marion County
Lowest/highest poles plus in-state counties nearest Marion County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Hannibal PWS | 17,108 | 178 | Detected |
| Marion County PWSD 1 | 4,900 | 11 | Detected |
| Palmyra PWS | 3,595 | 7 | Clean |
Compare beyond Missouri
Mid-flagged peers for Marion County
Cross-state counties nearest Marion County on flagged-system share (100.0%) and cumulative violation count (196). 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. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.