Front Range
No Ozone Action Day Alert in Effect (until 4 p.m. 06/20/2018)

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This is the Front Range Air Pollution Forecast effective 4PM on Tuesday, June 19, 2018:

No Advisories for Ozone or any other pollutant are in effect until at least 4 p.m. Wednesday, June 20, 2018 for the Front Range Urban Corridor from El Paso County north to Larimer and Weld counties, including the Denver-Boulder area, Colorado Springs, Fort Collins and Greeley.

Moderate temperatures and and northerly winds will keep ozone concentrations in the Good to Moderate range on Tuesday and Wednesday.

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 ( 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:

The highest Particulate Matter (PM2.5) related AQI at 8 o'clock AM Mountain Standard Time on June 20, 2018, is 22 which indicates Good Particulate Matter (PM2.5) air quality. It was recorded by the CAMP ambient monitor.

Front Range Air Quality Forecast & Colorado Smoke Outlook
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Wednesday, June 20, 2018, 8:00 AM MDT

Ozone concentrations are expected to be in the Good to Moderate range on Wednesday. Moderate concentrations of ozone are most likely across the Front Range Corridor, including the Denver Metro Area, Ft. Collins, Greeley, and Colorado Springs. In these areas Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion from noon until 10 PM on Wednesday.

Fine Particulate Matter concentrations are expected to be in the Good category on Wednesday.

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

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

Visibility on Wednesday is expected to be Good to Moderate.


Wednesday, June 20, 2018, 8:20 AM MDT

The 34,161 acre 416 wildfire is located in northern La Plata County, approximately 10 miles north of Durango. Winds on Wednesday will come primarily from the west, carrying smoke to east of the fire. Smoke from this fire will be visible from Highway 550 between, and including, Durango and Hermosa as well as surrounding areas.

The 474 acre Upper Mailbox wildfire located in San Miguel County, approximately 5 miles northeast of Redvale. Smoke will be transported to the southeast of the fire throughout the day on Wednesday, likely affecting rural portions of San Miguel County in the Uncompahgre National Forrest. Smoke may be visible from highway 145 between Naturita and Norwood. No public health impacts are expected.

The 14,684 acre Trail Mountain wildfire is located in central Utah, approximately 145 miles west of Grand Junction, Colorado. Smoke from this fire is being transported to the southeast of the fire, and is causing hazy skies, but no major health impacts, in far western portions of Colorado.

The 20,357 acre Badger Creek wildfire is located in Albany County, Wyoming, just north of the Colorado State Line, approximately 38 miles southwest of Laramie. Winds on Wednesday will come from the north throughout the day, carrying smoke to the south, likely affecting rural parts of Albany County and possibly locations as far south as the Colorado State line. Thunderstorms are also possible on Wednesday, and may produce gusty erratic winds that can send smoke in any direction. No public health impacts are expected.

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. Fine particulates may reach the Unhealthy category where smoke is heavy. Consider limiting outdoor activity when moderate to heavy smoke is present. People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion; everyone else should reduce prolonged or heavy exertion. 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. (, 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

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:




AIR QUALITY NOTIFICATIONS: automated e-mail alerts) forecasts via automated e-mails from the EPA)