Contaminant 0300
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
PWSID OK1020903 · Surface waterMunicipal
9,925 people served. 6 health-based SDWIS violations recorded in the past 5 years. 6 remain unresolved. Last cited 1 year ago.
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2025 (contaminant 1008).
Unresolved Total Trihalomethanes Rule violation cited in 2025 (total trihalomethanes (tthm)).
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.
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled
Maximum contaminant level exceeded; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Guthrie, Oklahoma (Census place; block-group disparity scores aggregated by centroid containment): a service population of 10,872. Local disparity score for pm2.5 (fine particulate) sits near the reference (103). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 103 | near the reference |
| Ozone | 110 | moderately above the reference |
| Nitrogen dioxide (NO₂) | 55 | below the reference |
| Diesel particulate | 53 | below the reference |
| Toxic releases (RSEI) | 32 | well below the reference |
| Traffic proximity | 26 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 77 | below the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 0 | well below the reference |
| Hazardous-waste site proximity | 26 | well below the reference |
| Underground storage tanks | 64 | below the reference |
| NPDES wastewater proximity | 105 | near 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 2021-01-01 → 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.