|Air Quality Health Advisory In Effect for Southeastern Larimer County. For More Info, Please Click Here.|
This is the Denver Metro Air Pollution Forecast effective 4PM on Saturday, December 10, 2016:
An Action Day for Visibility is now in effect for the seven-county Denver-Boulder metropolitan area. Indoor Burning Restrictions and requests to limit driving are now in effect until at least 4 PM Sunday, December 11, 2016. Poor visibility and an exceedance of the state visibility standard are expected on Sunday. Otherwise, good or moderate air quality conditions are expected. No other air quality advisories are in effect.
Cold, stagnant conditions will lead to Poor to Extremely Poor visibility on Saturday and Sunday.
For statewide conditions, forecasts and advisories, visit:
A poorly maintained vehicle pollutes more than a well maintained one. If you must drive, properly maintain your vehicle. We'll all breathe easier!
At 3PM (MST), Saturday, 12/10/2016 the highest AQI value was 92 for Particulate less than 2.5 micrometers which indicates Moderate air quality. 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:
Saturday, December 10, 2016, 3:00 PM MST
Ozone concentrations are expected to be in the Good category on Saturday and Sunday.
Fine Particulate Matter concentrations are expected to be in the Good to Unhealthy for Sensitive Groups range on Saturday and Sunday. Concentrations in the Unhealthy for Sensitive Groups category are expected in southeastern Larimer County and southern Weld County, including Fort Collins and Greeley. People with heart or lung disease, older adults and children should reduce prolonged or heavy exertion in these areas on Saturday and Sunday. Moderate concentrations of Fine Particulates are expected elsewhere along the Northern Colorado Front Range in areas north of the Palmer Divide, including the Denver Metro area and northward through Longmont. Unusually sensitive people should consider reducing prolonged or heavy exertion in these areas on Saturday and Sunday.
Carbon Monoxide concentrations are expected to be in the Good category on Saturday and Sunday.
Nitrogen Dioxide concentrations are expected to be in the Good to Moderate range on Saturday and Sunday. Moderate concentrations are most likely in the Denver Metro area near busy roadways, particularly during the evening hours. For health recommendations, please see Fine Particulate Matter above.
Visibility is expected to be Poor to Extremely Poor on Sunday.
COLORADO SMOKE OUTLOOK:
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.
For additional information about smoke, visit:
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 below), 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.
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 restrictions that limit burning inside the home to approved devices only (see indoor 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 restrictions that limit indoor burning to approved devices only and voluntary driving reductions for the seven-county Denver-Boulder metropolitan area.
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.
INDOOR BURNING: On Action Days issued during the winter 'high pollution day' season (October 31 through March 31), mandatory restrictions that limit indoor burning to approved devices only 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 indoor burning ordinance in effect on January 1, 1990. Under this regulation, the only exceptions to the 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 indoor burning, 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:
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: