Experience indicates that data from most crowdsourced sensors will be of value, and a minor fraction may have issues. Satellite fire detections are based on information from the National Oceanic and Atmospheric Administration’s (NOAA) Hazard Mapping System (HMS). Please use the Canada-wide forecast to evaluate whether long-range smoke transport may affect your region. It is possible that there are no publicly available sensors in your area, that the sensors in your area failed to meet the quality control screening criteria developed for this pilot, or that data from sensors is temporarily unavailable. The smoke-impacted events include wildfires and prescribed fires in the eastern and western U.S. These are generally operated by state, local or tribal air quality agencies and stay in place for many years. People with heart or lung disease, children, and older adults are the most likely to be affected by particle pollution exposure. It is possible that ozone or PM
Use the map layer icon in the upper righthand corner of the map to turn on information from AirNow monitors, USFS temporary monitors, and sensors. Under the concentration tab in the pop-up box, you will find adjusted PurpleAir sensor data for the most recent period. These corrected concentration data will not match the data for the same sensor and time period on the PurpleAir website. The map will continue to display the data available at the time it was originally loaded.
The EPA and USFS quality control steps compare the data from the A and B channels within the sensors. To refresh the data with the latest information press the button in the lower left corner or click on the prompt. Ground level concentration of particulate matter 2.5 microns and smaller (PMThis BlueSky Canada smoke forecast is considered experimental because it is produced by a system that is an ongoing research project and subject to uncertainties in weather forecasts, smoke dispersion and fire emissions. Others are so small they can only be detected using an electron microscope. EPA is in the process of collecting and analyzing data for other sensor models; however, the Agency does not have as significant of a body of data for other sensor technologies since there are fewer deployed across the U.S.
The colors show the US. Click on the monitor/sensor icon (circle, triangle, or square) to access additional information about air quality conditions at the monitor or sensor. Use the “Layer” menu on the top right (
The sensor data comes from PurpleAir, which crowdsources data from that company’s particle pollution sensors and shows the data on a map.
The map below displays active fire incidents within Oregon and Washington. This type of information is not captured in the public PurpleAir data feed that supplies the information for this website.
Notes and disclaimers:
Data Limitations and Disclaimers for important limitations on the data shown.Two types of fire information are presented on the map: large fire incidents and satellite fire detections. Additionally it will not represent smaller smoke plumes or smoke plumes otherwise not detected by the satellite images (e.g. The circles represent the permanent, stationary long-term monitoring stations that are used to report outdoor air quality to the public on AirNow.gov. There is a “learn more” link on each of these for access to more information. Data for temporary monitors is obtained through the AirSis and the Western Regional Climate Center (WRCC) data feeds. At this time, only Special Smoke Statements issued by ARAs are provided in the map however further information on smoke impacts can be available at your state, tribal or local air quality agency and the Pilot is assessing how to include such information in the map environment. Additional information on these incidents is available through the Inciweb system (
Users can use both websites to learn more about air quality in their area. The results of the pilot will help understand what is needed to incorporate additional sensor data on the Fire and Smoke Map, as resources allow. As a result, there will always be differences in how sensor data is shown on the two websites.
This will reduce the potential impact of missing RH data to a maximum of 4 μg/m3
Mention of trade names or commercial products does not constitute EPA or USFS endorsement or recommendation for use. Large Wildfire Map. Most of these discrepancies occurred along the breakpoints between AQI categories where small changes in particle pollution (PM
To see the AQI legend, tap or click the ? However, this feature is available for the uncorrected data on PurpleAir.com. Sensor data is not used on other maps on the AirNow website and is not used to generate the current air quality or forecast AQI shown on the “dial” on the AirNow home page or AirNow app.
See more information about the
Development work was done through an agreement with the University of Washington’s School of Environmental and Forest Sciences. The AirNow sensor data pilot project is designed to provide the public with additional information on levels of particle pollution (PM
The AQI is EPA’s color-coded tool for communicating air quality to the public. It also is possible that the state, local or tribal agency responsible for air quality in your area is not currently participating in the pilot, meaning sensor data would not show for your area. Data lag in transmission to AirNow is dependent on the specific monitor data transmission methodology and agency involved. Outside of the known high bias of PurpleAir sensor PM
USFS Air Quality WebCam Images.
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