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Front Range
Ozone Action Day Alert (until 4 p.m. 07/17/2018)

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The Colorado Department of Public Health and Environment and the Regional Air Quality Council have issued an OZONE ACTION DAY ALERT at 4 p.m. on Monday, July 16, 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.

Warm temperatures and abundant sunshine will allow ozone levels to reach the Unhealthy for Sensitive Groups category on Monday and Tuesday, with highest concentrations from the southern and western suburbs of the Denver Metro Area northward along the foothills toward west Ft. Collins.

This Ozone Action Day Alert will remain in effect until at least 4 p.m. Tuesday, July 17, 2018.

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

The highest Ozone related AQI at 7 o'clock PM Mountain Standard Time on July 16, 2018, is 151 which indicates Unhealthy ozone air quality. It was recorded by the CHAT ambient ozone monitor. Greater likelihood of respiratory symptoms and breathing difficulty in active children and adults and people with lung disease, such as asthma; possible respiratory effects in general population. Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy outdoor exertion; everyone else, especially children, should reduce prolonged or heavy outdoor exertion.

The highest Particulate Matter (PM2.5) related AQI at 7 o'clock PM Mountain Standard Time on July 16, 2018, is 59 which indicates Moderate Particulate Matter (PM2.5) air quality. It was recorded by the GREH ambient monitor. Respiratory symptoms possible in unusually sensitive individuals, possible aggravation of heart or lung disease in people with cardiopulmonary disease and older adults. Unusually sensitive people should consider reducing prolonged or heavy exertion.


Front Range Air Quality Forecast & Colorado Smoke Outlook
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FRONT RANGE AIR QUALITY FORECAST:
Monday, July 16, 2018, 2:30 PM MDT

Ozone concentrations are expected to be in the Moderate to Unhealthy for Sensitive Groups range on Monday and Tuesday. Ozone concentrations in the Unhealthy for Sensitive Groups category will be most likely for the south and west suburbs of Denver northward along the foothills to the west of Ft. Collins. In these areas, active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion from noon until 8 PM on Monday and Tuesday. Elsewhere in the Front Range region, unusually sensitive people should consider reducing prolonged or heavy outdoor exertion from noon until 10 PM on Monday and Tuesday.

Fine Particulate Matter concentrations are expected to be in the Good to Moderate range on Monday and Tuesday. Moderate conditions are most likely within the Denver Metro Area and northward along the I-25 corridor to Ft. Collins and Greeley. Unusually sensitive people should consider reducing prolonged or heavy exertion in these areas on Monday and Tuesday.

Carbon Monoxide concentrations are expected to be in the Good category on Monday and Tuesday.

Nitrogen Dioxide concentrations are expected to be in the Good category on Monday and Tuesday.

Visibility on Tuesday is expected to be Moderate and Poor.

COLORADO SMOKE OUTLOOK:
Monday, July 16, 2018, 2:30 PM MDT

The 6,822 acre Lake Christine wildfire is located close to Basalt in Eagle County. Areas of smoke should remain in close vicinity to the fire for much of the day on Monday, as winds at the fire will be out of the northwest with the possibility of areas of smoke to spread to the east and south of the fire during the afternoon and evening hours. Isolated thunderstorms are possible on Monday which could send smoke in any direction. Any smoke that does develop Monday night will likely drain into the Roaring Fork Valley, possibly bringing periods of mainly light to moderate smoke to Basalt Tuesday morning.




Light to moderate smoke is also possible near prescribed fires and small wildfires around the state.

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 above.

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)