County profile · EPA SDWIS + UCMR5
McMullen County, Texas
3 SDWIS-listed public water systems serve 1,677 people in McMullen County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 3
- SDWIS water systems Smaller third of counties
- 444
- Total violations Lower third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- -
- UCMR5 PFAS (none tested) No UCMR5 tests
SDWIS compliance plate
Sheet TX311 · McMullen County 3 sys · 444 viol · #3095/3254
VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-TINY · BOOK-MOST
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 13.5% health
- RANK-BOTTOM #3095/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-NONE No UCMR5 set
- SRC-GW GW lead 100%
- SYS-TINY 3 systems
- BOOK-MOST 6/7 fields
Nearest flagged-rate peer: Collin County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, McMullen County ranks #3,095 of 3,254 counties by people served, and #234 of 254 counties in Texas. See methodology · corpus placement.
McMullen 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 McMullen County . Population served ranks #3,095 of 3,254 · #234 of 254 in Texas.
Flagged-rate neighbourhood around McMullen County
Lowest/highest poles plus in-state counties nearest McMullen County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Tpwd Choke Canyon State Park Calliham | 759 | 168 | - |
| McMullen County Tilden | 618 | 128 | - |
| McMullen County Calliham | 300 | 148 | - |
Compare beyond Texas
Mid-flagged peers for McMullen County
Cross-state counties nearest McMullen County on flagged-system share (100.0%) and cumulative violation count (444). 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.