Johnston County, Oklahoma
SDWIS compliance plate
Sheet OK069 · Johnston County 13 sys · 2,143 viol · #2331/3254
VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-SMALL · BOOK-MOST
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 13.5% health
- RANK-LOWER #2331/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-NONE No UCMR5 set
- SRC-GW GW lead 85%
- SYS-SMALL 13 systems
- BOOK-MOST 6/7 fields
Nearest flagged-rate peer: Tulsa County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Johnston County ranks #2,331 of 3,254 counties by people served, and #53 of 77 counties in Oklahoma. See methodology · corpus placement.
Johnston 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 13.5% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Johnston County . Population served ranks #2,331 of 3,254 · #53 of 77 in Oklahoma.
Flagged-rate neighbourhood around Johnston County
Lowest/highest poles plus in-state counties nearest Johnston County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Tishomingo Municipal Authority | 3,000 | 275 | - |
| Johnston Co RWD #3 | 2,783 | 100 | - |
| Murray State College | 1,150 | 199 | - |
| Johnston Co RWS& Swmd #4 | 600 | 334 | - |
| Mannsville Public Works Authority | 587 | 216 | - |
| Ravia | 459 | 130 | - |
| Sundowner Trailer | 450 | 127 | - |
| Wapanucka | 420 | 228 | - |
| Milburn Public Works Authority | 317 | 115 | - |
| Mill Creek | 310 | 64 | - |
| Bromide | 163 | 270 | - |
| US Silica | 31 | 15 | - |
| Camp Simpson Bsa | 26 | 70 | - |
Compare beyond Oklahoma
Mid-flagged peers for Johnston County
Cross-state counties nearest Johnston County on flagged-system share (100.0%) and cumulative violation count (2,143). 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.