Contaminant 8000
Unresolved Revised Total Coliform Rule violation cited in 2025 (contaminant 8000).
PWSID TX0940092 · GroundwaterPrivate
30 people served. 1 health-based SDWIS violation recorded in the past 5 years. 13 remain unresolved. Last cited 1 year ago.
Unresolved Revised Total Coliform Rule violation cited in 2025 (contaminant 8000).
Unresolved Volatile Organic Chemical Rule violation cited in 2025 (contaminant 7500).
Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2025 (chlorine).
Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2025 (chlorine).
Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.
Monitoring failure
Monitoring failure; returned to compliance
OTHER
Failure to monitor as scheduled
Failure to monitor as scheduled
OTHER
Failure to monitor as scheduled
OTHER
Treatment technique violation
Reporting failure
OTHER
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled
Seguin, Texas (Census place; block-group disparity scores aggregated by centroid containment): a service population of 30,318. Local disparity score for pm2.5 (fine particulate) sits moderately above the reference (135). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 135 | moderately above the reference |
| Ozone | 98 | near the reference |
| Nitrogen dioxide (NO₂) | 141 | moderately above the reference |
| Diesel particulate | 68 | below the reference |
| Toxic releases (RSEI) | 63 | below the reference |
| Traffic proximity | 74 | below the reference |
| Lead-paint risk (pre-1960 housing) | 106 | near the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 139 | moderately above the reference |
| Hazardous-waste site proximity | 67 | below the reference |
| Underground storage tanks | 151 | well above the reference burden |
| NPDES wastewater proximity | 92 | near the reference |
| Drinking-water non-compliance | 53 | below the reference |
Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).
Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2020-01-01 → 2026-05-07.
What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.