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Front Range
No Ozone Action Day Alert in Effect
Until at least 4 p.m. 07/31/2021

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This is the Front Range Air Pollution Forecast effective 4PM on Friday, July 30, 2021:

No Advisories for Ozone or any other pollutant are in effect until at least 4 p.m. Saturday, July 31, 2021 for the Front Range Urban Corridor from Douglas County north to Larimer and Weld counties, including the Denver-Boulder area, Fort Collins and Greeley.

Ozone concentrations are expected to remain in the Good to Moderate range on Saturday for locations throughout the Colorado Front Range region.

Should atmospheric conditions suggest increased ground-level ozone concentrations, the Colorado Department of Public Health and Environment and the Regional Air Quality Council will issue an ozone advisory. In addition, if conditions warrant, the Colorado Department of Public Health and Environment will issue advisories for other pollutants. Check this website (https://colorado.gov/airquality/advisory.aspx) often for a report on current air quality conditions and to learn if an ozone action day alert is in effect.

For statewide conditions, forecasts and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx

The highest Ozone related AQI at 9 o'clock AM Mountain Standard Time on July 31, 2021, is 71 which indicates Moderate ozone air quality. It was recorded by the ACAD ambient ozone monitor. Unusually sensitive individuals may experience respiratory symptoms. Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.

The highest Particulate Matter (PM2.5) related AQI at 9 o'clock AM Mountain Standard Time on July 31, 2021, is 50 which indicates Good Particulate Matter (PM2.5) air quality. It was recorded by the NJH ambient monitor.


Front Range Air Quality Forecast & Colorado Smoke Outlook
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FRONT RANGE AIR QUALITY FORECAST:
Saturday, July 31, 2021, 7:50 AM MDT

Ozone concentrations are expected to be in the Good to Moderate range on Saturday. Moderate concentrations of ozone are expected throughout the Front Range region, and unusually sensitive people should consider reducing prolonged or heavy outdoor exertion from noon until 10 pm on Saturday.

Fine Particulate Matter concentrations are expected to be in the Good to Moderate range on Saturday. Moderate concentrations of fine particulates are possible throughout the Front Range region, so unusually sensitive people should consider reducing prolonged or heavy exertion on Saturday.

Carbon Monoxide concentrations are expected to be in the Good category on Saturday.

Nitrogen Dioxide concentrations are expected to be in the Good category on Saturday.

Visibility in Denver on Saturday is expected to be Good to Moderate, with possible periods of weather exclusion due to intermittent rain showers.

COLORADO SMOKE OUTLOOK:
Saturday, July 31, 2021, 8:00 AM MDT

Air Quality Health Advisory for Wildfire Smoke

Issued for northern Routt County
Issued at 8:00 AM MDT, Saturday, July 31, 2021

Issued by the Colorado Department of Public Health and Environment

Affected Area: northern Routt County. Locations include, but are not limited to Glen Eden and Clark.

Advisory in Effect: 8:00 AM MDT, Saturday, July 31, 2021 to 9:00 AM MDT, Sunday, August 1, 2021.

Public Health Recommendations: If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and the elderly. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy.

Outlook: Areas of moderate to heavy smoke have been observed in close proximity to the Morgan Creek wildfire in northern Routt County Saturday morning. Smoke concentrations should gradually decrease late Saturday morning as atmospheric mixing improves. Rain showers and thunderstorms will be possible on Saturday, and may produce gusty erratic, gusty winds that could send smoke in any direction. By late Saturday evening, smoke will begin to drain to lower elevations surrounding the fire. This will likely bring periods of heavy smoke again to areas along Morgan and Reed Creeks, eventually draining into the Elk River Valley and impacting the communities of Glen Eden and Clark through Sunday morning.



The transport of smoke into Colorado from out-of-state wildfires is expected to continue on Saturday. Hazy skies and generally moderate levels of fine particulate matter will remain possible for northern and eastern parts of the state onSaturday. In these areas, unusually sensitive people should consider reducing prolonged or heavy exertion on Saturday.

What if there is a wildfire or smoke in your area?
The focus of the Colorado Smoke Outlook is on large fires (e.g., greater than 100 acres in size). Nevertheless, smoke from smaller fires, prescribed fires, and/or smoke from new fires not yet known to
CDPHE air quality meteorologists may cause locally heavy smoke. If there is smoke in your neighborhood, see the public health recommendations below.

Public health recommendations for areas affected by smoke:
If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and the elderly. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. IF VISIBILITY IS LESS THAN 5 MILES IN SMOKE IN YOUR NEIGHBORHOOD, SMOKE HAS REACHED LEVELS THAT ARE UNHEALTHY.


Summer Ozone Program
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Ground-level ozone is an air pollution problem that impacts the health of all Coloradans. Exposure can cause acute respiratory problems and trigger asthma attacks. During Ozone Action Alerts, avoid rigorous outdoor activity during the heat of the day. Prolonged exposure can cause long-lasting damage to your lungs.

You CAN make a difference by doing your part to improve air quality along Denver's Front Range. Combining or skipping just two car trips a week has a positive impact on our air quality. Find other easy solutions that fit your lifestyle from Simple Steps. Better Air. (http://www.SimpleStepsBetterAir.org), a program of the Regional Air Quality Council.

Additional Information
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WHAT IS AN ACTION DAY?: An Action Day for fine particulate matter, carbon monoxide, ozone or other pollutants indicates that either current air quality is unhealthy or conditions are expected to worsen later in the day or on the next day. Action Days for air pollutants generally indicate that air quality will be in either the Unhealthy or Unhealthy-for-Sensitive-Groups categories according to the Air Quality Index. Action Days always convey overarching public health recommendations, and, according to season, trigger a variety of mandatory and voluntary pollution prevention measures. For example, during the summer open burning is prohibited when an Action Day for ozone and/or fine particulates is in effect. During the winter, residential burning restrictions are in effect when an Action Day for Visibility is in effect.

For a detailed description of both the AIR QUALITY INDEX and the VISIBILITY STANDARD INDEX please visit https://www.colorado.gov/airquality/brochure.aspx

COLORADO OPEN BURN FORECAST: For those with permits for open burning, that is the burning of waste materials or vegetation outside, check the following webpage to find out if open burning is allowed today. Keep in mind that open burning is prohibited when an Action Day is in effect:
https://www.colorado.gov/airquality/burn_forecast.aspx

FOR CURRENT FRONT RANGE ACTION DAYS/ADVISORIES:
https://www.colorado.gov/airquality/advisory.aspx

FOR CURRENT AIR QUALITY CONDITIONS STATEWIDE:
https://www.colorado.gov/airquality/air_quality.aspx

SOCIAL MEDIA:
https://www.facebook.com/cdphe.apcd
https://twitter.com/cdpheapcd


AIR QUALITY NOTIFICATIONS:
https://www.colorado.gov/airquality/request_alerts.aspx(CDPHE automated e-mail alerts)
http://www.enviroflash.info/signup.cfm(CDPHE forecasts via automated e-mails from the EPA)