Haloacetic Acids (HAA5)
Unresolved Total Trihalomethanes Rule violation cited in 2025 (haloacetic acids (haa5)).
PWSID KS2004904 · Purchased / wholesaleMunicipal
148 people served. 7 health-based SDWIS violations recorded in the past 5 years. 9 remain unresolved. Last cited 1 year ago.
Unresolved Total Trihalomethanes Rule violation cited in 2025 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2025 (haloacetic acids (haa5)).
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
Monitoring failure
Monitoring failure; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Maximum contaminant level exceeded
OTHER; returned to compliance
OTHER; returned to compliance
OTHER; returned to compliance
OTHER; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Elk County, Kansas (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 2,453. Local disparity score for pm2.5 (fine particulate) sits below the reference (66). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 66 | below the reference |
| Ozone | 54 | below the reference |
| Nitrogen dioxide (NO₂) | 5 | well below the reference |
| Diesel particulate | 7 | well below the reference |
| Toxic releases (RSEI) | 9 | well below the reference |
| Traffic proximity | 1 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 83 | below the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 0 | well below the reference |
| Hazardous-waste site proximity | 0 | well below the reference |
| Underground storage tanks | 25 | well below the reference |
| NPDES wastewater proximity | 0 | well below the reference |
| Drinking-water non-compliance | 51 | 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 2022-01-01 → 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.