No advisories are currently in effect 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:
At 10PM (MST), Friday, 5/17/2013 the highest AQI value was 71 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 2013 Ozone Action Day Alert Program begins June 1. 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 2012/2013 High Pollution Advisory Program has concluded. 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:
Friday, May 17, 2013, 2:15 PM
Ozone concentrations are expected be in the Good to Moderate range Friday through Monday. Moderate concentrations of ozone are possible for much of the Front Range region during the afternoon and evening hours on Friday and Saturday. Good concentrations of ozone are expected Sunday before moderate levels will be possible again Monday afternoon and evening, mainly for the foothills to the west of a Denver to Ft. Collins line. Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion Friday, Saturday and Monday afternoons and evenings in those locations.
Fine Particulate Matter concentrations are expected to be in the Good category for Friday through Monday.
Carbon Monoxide concentrations are expected to be in the Good category for Friday through Monday.
Nitrogen Dioxide concentrations are expected to be in the Good category for Friday through Monday.
Visibility in Denver is expected to be Good to Moderate for Friday through Monday.
COLORADO SMOKE OUTLOOK:
Friday, May 17, 2013, 2:15 PM
Light to moderate smoke is possible near prescribed fires over the next several days.
For additional information about Wildfire Smoke, visit:
What if there is smoke in your area that is not reported above?
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 VISIBILITY IS LESS THAN 5 MILES IN SMOKE IN YOUR NEIGHBORHOOD, SMOKE HAS REACHED LEVELS THAT ARE UNHEALTHY. 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.
ACTION DAYS: An Action Day for fine particulate matter (particulates), 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 trigger voluntary pollution prevention measures, which may vary by season, and public health recommendations. In addition, during the winter 'high pollution day' season (October 31 to March 31), Action Days trigger mandatory residential burning restrictions (see residential burning below).
Action Days for Visibility alone are issued during the winter 'high pollution day' season (October 31 to March 31), only. At the time they are issued (4 PM), action days for visibility indicate that the Visibility Standard Index for visual air quality is expected to be poor on the following day. Action Days for Visibility trigger mandatory residential burning restrictions and voluntary driving reductions for the seven-county Denver-Boulder metropolitan area only (see residential burning below).
The VISIBILITY STANDARD INDEX reports the air's visual quality in the seven-county Denver-Boulder metropolitan area. The visibility standard is 0.076 per kilometer of atmospheric extinction, which means that 7.6 percent of the light in a kilometer of air is blocked. The level must exceed the standard based on a four-hour average for a violation to occur. On the Visibility Standard Index Scale, a value of 101 equates to the 0.076/km standard. Values between 0-50 are good, 51-100 moderate, 101-200 poor and 201-plus extremely poor.
The AIR QUALITY INDEX reports the daily level of air pollution on an hourly basis. The index reports the highest level of either carbon monoxide, fine particulates or ozone depending on which pollutant has the greatest hourly concentration. Values greater than 100 for carbon monoxide, fine particulates and ozone indicate exceedances of the pollutant's state and federal standards. Air Quality Index values between 0-50 are good, 51-100 moderate, 101-150 unhealthy for sensitive groups, 151-200 unhealthy, 201-300 very unhealthy, and over 300 hazardous.
RESIDENTIAL BURNING: On Action Days issued during the winter 'high pollution day' season (October 31 through March 31), mandatory residential burning restrictions generally apply to everyone in the entire seven-county Denver-Boulder metropolitan area below 7,000 feet. The restrictions will be enforced through local ordinances or a state regulation.
The state regulation applies to any community in the seven-county Denver-Boulder metropolitan area that did not have its own mandatory residential burning ordinance in effect on January 1, 1990. Under this regulation, the only exceptions to the residential burning restrictions are for residences above 7,000 feet in the seven-county Denver-Boulder metropolitan area; and those who use Colorado Phase III (Phase II EPA) certified woodburning stoves, Colorado approved pellet stoves, approved masonry heaters or those whose stoves or fireplaces are their primary source of heat. For more information on residential burning restrictions, call the Air Pollution Control Division at (303) 692-3100.
For more, go to: http://www.cdphe.state.co.us/ap/woodhome.html
COLORADO OPEN BURN FORECAST: For those with permits for Open Burning, that is burning of waste materials or vegetation outside, check the following webpage to find out if open burning is allowed today:
FOR CURRENT AIR QUALITY INFORMATION AND UPDATES:
ABOUT THE AIR QUALITY INDEX:
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 residential 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 residential burning restrictions (see residential 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 residential burning restrictions and voluntary driving reductions for the seven-county Denver-Boulder metropolitan area only (see residential burning above).
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.
For an AQI value that considers all pollutants, please click here.
Ground-level ozone is a summertime air pollution problem that is created when other pollutants from sources like vehicle exhaust, paints, degreasing agents and cleaning fluids react with sunlight. Exposure to ground-level ozone can cause acute respiratory problems, reduced lung capacity and inflammation of lung tissues and can trigger asthma attacks.
Ground-level ozone should not be confused with the protective stratospheric ozone layer miles above the Earth's surface. This naturally-occurring ozone layer protects the Earth's surface from excessive ultra-violet radiation.
Do your share and be a part of the solution to the Denver-metropolitan area's summertime air pollution problems. These easy strategies will help reduce the harmful vapors that react in sunlight to create summertime air pollution:
In the Yard:
On the Go:
To learn more about the summer ozone program, visit: