Contaminant 5200
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
PWSID OK1020702 · Surface waterMunicipal
3,142 people served. 31 health-based SDWIS violations recorded in the past 5 years. 10 remain unresolved. Last cited 1 year ago.
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
Unresolved Total Trihalomethanes Rule violation cited in 2023 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2023 (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.
Failure to monitor as scheduled; returned to compliance
Treatment technique violation
Reporting failure
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; 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
Failure to monitor as scheduled; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; 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
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Chandler, Oklahoma (Census place; block-group disparity scores aggregated by centroid containment): a service population of 2,886. 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 | 116 | moderately above the reference |
| Nitrogen dioxide (NO₂) | 54 | below the reference |
| Diesel particulate | 63 | below the reference |
| Toxic releases (RSEI) | 9 | well below the reference |
| Traffic proximity | 17 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 142 | moderately above the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 183 | well above the reference burden |
| Hazardous-waste site proximity | 0 | well below the reference |
| Underground storage tanks | 120 | moderately above the reference |
| NPDES wastewater proximity | 126 | moderately above the reference |
| Drinking-water non-compliance | 144 | moderately above 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.