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Special Air Quality Statement
Air Quality Health Advisory for Wildfire Smoke for portions of Grand County.

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Front Range
No Advisories in Effect

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This is the Denver Metro Air Pollution Forecast effective 4PM on Thursday, 9/20/2018:

No advisories are in effect until at least 4 p.m. on Friday 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.

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

At 9PM (MST), Thursday, 9/20/2018 the highest AQI value was 58 for Ozone which indicates Moderate air quality. Unusually sensitive individuals may experience respiratory symptoms. Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.

The Colorado Department of Public Health and Environment and the Regional Air Quality Council's Summer 2018 Ozone Action Day Alert Program has concluded. The winter High Pollution Advisory Program begins on November 1. Air Quality Action Days or advisories for ozone for other pollutants, however, will be issued as needed at any time during the year and reported on this web page.

The Air Pollution Control Division's Winter 2018/2019 High Pollution Advisory Program will begin November 1. Thank you for your interest in and support for efforts to improve air quality for the citizens of the Denver- metro area.


Front Range Air Quality Forecast & Colorado Smoke Outlook
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FRONT RANGE AIR QUALITY FORECAST:
Thursday, September 20, 2018, 12:30 PM MDT

Ozone concentrations are expected to be in the Good category on Thursday and the Good to Moderate range on Friday. On Friday, ozone concentrations in the moderate 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, unusually sensitive people should consider reducing prolonged or heavy outdoor exertion from 2 PM until 8 PM on Friday.

Fine Particulate Matter concentrations are expected to be in the Good to Moderate range on Thursday and the Good category on Friday. On Thursday, moderate concentrations of fine particulates will mainly be confined to locations within the Denver metro area. In these areas, unusually sensitive people should consider reducing prolonged or heavy exertion on Thursday.

Carbon Monoxide concentrations are expected to be in the Good category on Thursday and Friday.

Nitrogen Dioxide concentrations are expected to be in the Good category on Thursday and Friday.

Visibility on Friday is expected to be Good.

COLORADO SMOKE OUTLOOK
Friday, September 20, 2018, 12:30 PM MDT

Air Quality Health Advisory for Wildfire Smoke

Issued for western parts of Grand County
Issued at 7:30 AM MDT, Thursday, September 20, 2018

Issued by the Colorado Department of Public Health and Environment

Affected Area: western parts of Grand County

Advisory in Effect: 7:30 AM MDT, Thursday, September 20, 2018 to 9:00 AM MDT, Friday, September 21, 2018.

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 from the Silver Creek Fire can be expected Thursday morning in western parts of Grand County. This will mainly impact rural areas along and near Highway 40 to the north of Kremmling. On Thursday, winds will generally come from the west, moving smoke to the east of the fire. Late Thursday night and early Friday morning smoke will likely drain from the fire eastward, once again impacting western parts of Grand County to the north of Kremmling, particularly along low-lying areas near the Wolford Mountain Reservoir with periods of moderate to heavy smoke.


The 32,545 acre Bull Draw Fire is located approximately 12 miles northwest of Nucla near the Montrose/Mesa County line. Winds at the fire on Thursday are expected to come from the northwest, sending smoke southeast of the fire. This will produce periods of smoke in rural parts of Montrose and Mesa Counties. Smoke from this fire will be visible from major roadways in the vicinity. Overnight, smoke will settle into local drainages including Bull Draw, Big and Little Johnson Creek, Spring Creek, and in mainly rural portions of Montrose and Mesa Counties in and around the Uncompahgre National Forest. No significant public health impacts are expected.

The 558 acre Horse Fire is located 16 miles northwest of Pagosa Springs in Archuleta County. Winds at the fire on Thursday are expected to come from the northwest, sending smoke southeast of the fire. This will produce periods of smoke in mainly rural areas of Archuleta County. Smoke from this fire will be visible from major roadways in the vicinity of the fire, and will settle in local drainages overnight. No significant public health impacts are expected.

The 2,549 acre Ryan Fire is located 20 miles northwest of Walden in northern Jackson County, spanning the Wyoming State line. On Thursday, winds at the fire will be out of west, sending smoke to the east of the fire. This will produce periods of smoke in remote locations near the fire, with much of the smoke impacting locations in Wyoming. Overnight, smoke will settle in low lying areas, affecting the Encampment River drainage, the Damfino Creek drainage, and along the Big Creek drainages. No significant public health impacts are expected.

Light to moderate concentrations of smoke are also possible near small wildfires and prescribed burns 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 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.


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)

Winter High Pollution Advisory Program
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The Winter High Pollution Advisory Program is coordinated by the Air Pollution Control Division of the Colorado Department of Public Health and Environment.

Winter season air pollution forecasts are issued daily from October 31 through March 31 at 4 p.m. When conditions warrant, forecasts will include information about Action Days and subsequent indoor burning restrictions.

An Action Day for fine particulates, carbon monoxide or ozone 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 trigger mandatory restrictions that limit indoor burning to approved devices only (see indoor burning above), voluntary driving reductions, and public health recommendations.

An Action Day for Visibility alone indicates that the Visibility Standard Index for visual air quality is expected to be poor on the current or following day. An Action Day for Visibility will trigger mandatory restrictions on indoor burning and voluntary driving reductions for the seven-county Denver-Boulder metropolitan area only.

When no advisories are issued, air quality is good or moderate and is expected to remain so during the effective period of the forecast. No restrictions are in place.

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.