# Air Quality Alert: Arapahoe, CO; Jefferson, CO; Boulder, CO; Denver, CO; Weld, CO; Douglas, CO; Broomfield, CO; Larimer, CO; Adams, CO — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/d2f70ef4902928a4

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-07-18 16:11 ingested 2026-07-19 08:12

[original source ↗](http://www.weather.gov/)

## extract

Air Quality Alert — Arapahoe, CO; Jefferson, CO; Boulder, CO; Denver, CO; Weld, CO; Douglas, CO; Broomfield, CO; Larimer, CO; Adams, CO
Severity: Unknown. Certainty: Unknown.
The Colorado Department of Public Health and Environment has
issued the following...

WHAT...Ozone Action Day Alert.

WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties

WHEN...400 PM Saturday July 18 to 400 PM Sunday July 19

IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor.  Hot and sunny weather will allow ozone to
reach levels that are Unhealthy for Sensitive Groups on Saturday
and Sunday. The highest concentrations are most likely in western
portions of the northern Colorado Front Range region.   For
Colorado air quality conditions, forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx   If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until at least 4 p.m.
Sunday, July 19, 2026. Colorado is also addressing ozone pollution
through state policies. For more information about health impacts
and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health

HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
in sensitive individuals, aggravation of heart or lung disease and
premature mortality in people with cardiopulmonary disease and
older adults. People with heart or lung disease, older adults, and
children should reduce prolonged or heavy exertion.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.