E. coli
Unresolved Long Term 2 Enhanced SWTR violation cited in 2025 (e. coli).
PWSID CO0110040 · Mixed sourcesMunicipal
451 people served. 12 health-based SDWIS violations recorded in the past 5 years. 6 remain unresolved. Last cited 1 year ago.
Unresolved Long Term 2 Enhanced SWTR violation cited in 2025 (e. coli).
Unresolved Surface Water Treatment Rule violation cited in 2024 (contaminant 0200).
Unresolved Surface Water Treatment Rule violation cited in 2024 (contaminant 0200).
Unresolved Long Term 1 Enhanced SWTR violation cited in 2024 (contaminant 0300).
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.
OTHER; returned to compliance
Failure to monitor as scheduled
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
Failure to monitor as scheduled; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
OTHER; returned to compliance
OTHER; returned to compliance
Treatment technique violation; 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
OTHER; returned to compliance
OTHER; returned to compliance
Failure to monitor as scheduled; returned to compliance
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; returned to compliance
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; 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
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
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
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
Failure to monitor as scheduled; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; 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
Wheat Ridge, Colorado (Census place; block-group disparity scores aggregated by centroid containment): a service population of 32,263. Local disparity score for pm2.5 (fine particulate) sits below the reference (63). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 63 | below the reference |
| Ozone | 99 | near the reference |
| Nitrogen dioxide (NO₂) | 55 | below the reference |
| Diesel particulate | 84 | below the reference |
| Toxic releases (RSEI) | 99 | near the reference |
| Traffic proximity | 88 | below the reference |
| Lead-paint risk (pre-1960 housing) | 65 | below the reference |
| Superfund site proximity | 84 | below the reference |
| RMP-facility proximity | 48 | well below the reference |
| Hazardous-waste site proximity | 68 | below the reference |
| Underground storage tanks | 86 | below the reference |
| NPDES wastewater proximity | 87 | 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 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.