This is a combination of automated satellite detected “hotspots” from various satellites and human analyzed fire locations based on smoke plumes. Clicking on any monitor or sensor will bring up a popup box that shows additional information for the unit including its:Shows information about the currently set location of interest. This term often describes an integrated set of hardware and software that uses one or more “sensing elements” (also sometimes called sensors) to detect or measure pollutant concentrations. The NowCast for particle pollution shows you air quality for the most current hour available by using a calculation that involves multiple hours of past data. The sidebar shows several different sets of information including air quality (PM
These monitors are regulatory-grade, and the data they produce is of the highest quality.
Fire and smoke plume detections are from the NOAA’s Hazard Mapping System Fire and Smoke Products. The EPA and USFS quality control steps compare the data from the A and B channels within the sensors. The PMIf you are concerned about smoke affecting the air quality near you, please contact your state, tribal or local air quality agency and/or local public health agencies for additional air quality information and air quality alerts. However, EPA’s quality assurance/quality control process will screen out some poorly performing sensors. This map contains four different types of data: Fire origins mark the fire fighter's best guess of where the fire …
NowCast refers to an algorithm that is applied to the hourly permanent, temporary, and sensor data when an estimate of the current hourly AQI is needed. Contact Us. After applying some quality control checks, the EPA national correction equation is then applied to the hour averaged sensor data. The NowCast uses longer averages during periods of stable air quality and shorter averages when air quality is changing rapidly, such as during a wildfire. Fire and Smoke Map. Los Angeles. PM If you are near a fire or feel that you are at risk, please contact your local authorities for information and updates. In addition, a lack of information about the maintenance, or operation of these sensors, adds additional uncertainty. EPA uses the NowCast to show you current air quality using the AQI colors and scale (the AQI for particle pollution is a 24-hour index). Experience indicates that data from most crowdsourced sensors will be of value, and a minor fraction may have issues. Additionally, depending on the satellite the specific location covered by the image pixel may be 1 or more kilometers in resolution. 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. However, this feature is available for the uncorrected data on PurpleAir.com. Click on the search button (magnifying glass) on the top right menu to search for a location by city, state or, area. 40 CFR Parts 50, 53, and 58). Active large fire incidents from the U.S. National Interagency Fire Center’s active incident feed are presented as fire icons. The Before the sensor data appear on the AirNow Fire and Smoke Map, EPA and USFS apply both a scientific correction equation to mitigate bias in the sensor data, and the NowCast, the algorithm to show the data in the context of the Air Quality Index. Click on the flashing blue dot on the top right menu to re-center the map on your current location. Both the fire detections and the smoke plume data generated by the Hazard Mapping System note that the information on fire position should be used as general guidance and for strategic planning, not for tactical decisions, such as the activation of a response to fight these fires and evacuation efforts, without other information to corroborate the fire's existence and location. Data is retrieved from AirNow every 3 min. Fire Information The AirNow Fire and Smoke pilot map does not currently have a feature to allow the user to download sensor data. Data is retrieved approximately every 15min, but the monitors themselves only report hourly aggregates based on the clock hour (e.g. Learn More about the EPA researchers have used a scientific approach to develop a correction equation for PurpleAir sensors. This adjustment will likely not significantly impact the Air Quality Index that would be reported based on the resulting data.
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