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Understanding Real-Time Particle Pollution Data and Maps

Understanding Real-Time Particle Pollution Data and Maps. US EPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md Cary D. Gentry Environmental Specialist Forsyth Co. Environmental Affairs Dept. How do you explain Particle Pollution to the media and public?.

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Understanding Real-Time Particle Pollution Data and Maps

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  1. Understanding Real-Time Particle Pollution Data and Maps US EPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md Cary D. Gentry Environmental Specialist Forsyth Co. Environmental Affairs Dept. USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  2. How do you explain Particle Pollution to the media and public? Particle Pollution Ozone • New title • Year round pollutant • NOT like ozone • not necessarily diurnal • 24hr average versus 8hr • monitoring network not as dense • Same color code but different health risks • Oh no...What to do if multiple pollutants are ORANGE or higher? USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  3. What are the current HOURLY average maps telling us? • Computed “24hr” average using surrogate model • Conroy method • Valuable to public • Tries to predict trends • Influenced by local effects? • Best until a shorter term AQI can be developed Current Hour - Particle Pollution (PM2.5) USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  4. What is the rolling 24 hour map telling us? • Still uses a surrogate model • More complete/real • Better on long term local effects/may miss short term effects • More “true” to the color code 24-hour Average Concentration USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  5. Compliance Method FRM considered the “true” value Values very similar to continuous monitors in parts of the country Values NOT similar to continuous monitors in other parts of the country Takes weeks to process the data Continuous/Real time Method Correction factors used to make the values FRM like big issue in parts of the country Less coverage Best method we have for real time data FRM vs. TEOM/BAM What does it mean? USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  6. Local Effects? • Inversions • More prevalent during winter • example: Salt Lake City • Special events • ex. California fires 2003 • dust storms • Interstates • Strange data • Suspect data USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  7. Should we take health action now? • If needed…YES • Based on statistics, the 1hr and rolling 24hr maps are accurate for the given time • Keep up with the “trends” ORANGE Health Effects RED PURPLE USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  8. Knowledge is the Key • Know your network • monitor locations • FRM vs Continuous • Correction factors? • Seasonal variations • Local effects • Know the forecast USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  9. Winston-Salem, NC 2003 AQI USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  10. Particle Pollution NC vs Utah AQI USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  11. USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  12. What’s going on? Fire, Instrument problem? Looks OK What’s going on? Fire, Instrument problem? Looks OK USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  13. Nationwide Ozone Network Density n= 1420* USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  14. Nationwide PM2.5 Network Density n= 415 USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  15. Maintenance USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  16. Instrument Errors USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  17. Weird Spike/Drop USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  18. Lawn Mower? USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  19. Health Messages USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

  20. Bakersfield, CAAir Quality Forecast for Wednesday, 07 Jan 2004PM2.5 - Unhealthy for Sensitive Groups Forecasts USEPA’s 2004 National Air Quality Conference February 22-25, 2004 Baltimore, Md

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