Total Trihalomethanes (TTHM)
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
PWSID MS0450034 · GroundwaterMunicipal
8,511 people served. 2 health-based SDWIS violations recorded in the past 5 years. 16 remain unresolved. Last cited 2 years ago.
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
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.
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Reporting failure; returned to compliance
Reporting failure; returned to compliance
Reporting failure; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Canton, Mississippi (Census place; block-group disparity scores aggregated by centroid containment): a service population of 10,951. Local disparity score for pm2.5 (fine particulate) sits severely above the reference burden (232). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 232 | severely above the reference burden |
| Ozone | 45 | well below the reference |
| Nitrogen dioxide (NO₂) | 99 | near the reference |
| Diesel particulate | 77 | below the reference |
| Toxic releases (RSEI) | 124 | moderately above the reference |
| Traffic proximity | 80 | below the reference |
| Lead-paint risk (pre-1960 housing) | 183 | well above the reference burden |
| Superfund site proximity | 245 | severely above the reference burden |
| RMP-facility proximity | 229 | severely above the reference burden |
| Hazardous-waste site proximity | 131 | moderately above the reference |
| Underground storage tanks | 230 | severely above the reference burden |
| NPDES wastewater proximity | 62 | 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 2023-01-01 → 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.