Total Trihalomethanes (TTHM)
Unresolved Total Trihalomethanes Rule violation cited in 2025 (total trihalomethanes (tthm)).
PWSID TX2440007 · Purchased / wholesaleMunicipal
156 people served. 23 health-based SDWIS violations recorded in the past 5 years. 23 remain unresolved. Last cited 1 year ago.
Unresolved Total Trihalomethanes Rule violation cited in 2025 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2025 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2025 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2025 (haloacetic acids (haa5)).
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.
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum residual disinfectant level exceeded
Maximum residual disinfectant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum residual disinfectant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Wichita Falls, Texas (Census place; block-group disparity scores aggregated by centroid containment): a service population of 102,482. Local disparity score for pm2.5 (fine particulate) sits below the reference (59). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 59 | below the reference |
| Ozone | 117 | moderately above the reference |
| Nitrogen dioxide (NO₂) | 98 | near the reference |
| Diesel particulate | 68 | below the reference |
| Toxic releases (RSEI) | 87 | below the reference |
| Traffic proximity | 65 | below the reference |
| Lead-paint risk (pre-1960 housing) | 88 | below the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 121 | moderately above the reference |
| Hazardous-waste site proximity | 81 | below the reference |
| Underground storage tanks | 96 | near the reference |
| NPDES wastewater proximity | 57 | below the reference |
| Drinking-water non-compliance | 0 | well 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 2024-01-01 → 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.