1. Fine Particle (PM2.5) Designations | US EPA

    www.epa.gov/pmdesignations/‎
    Apr 17, 2013 - This Web site provides information about EPA's actions designating areas whose air quality does not meet the health-based standards ...
    ‎Designations Guidance and ... - ‎Area Designations - ‎Basic Information - ‎Contact Us

  2. Frequent Questions | Fine Particle (PM2.5) Designations | US EPA

    www.epa.gov › ... › Six Common Pollutants › Particulate Matter‎
    You are here: EPA Home · Air & Radiation · Six Common Pollutants · Particulate Matter · Fine particle (PM2.5) Designations; Frequent Questions ...

  3. Particulates - Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Particulates‎
    Jurisdictions (provinces) may set more stringent standards. The CCME standard for particulate matter 2.5 (PM2.5) is 30 μg/m3 (daily average, i.e. 24-hour period,  ...
    ‎Sources of atmospheric ... - ‎Composition - ‎Deposition processes

  4. Particle Pollution (PM10) and (PM2.5) - AIRNow

    airnow.gov/index.cfm?action=aqibasics.particle‎
    Particle Pollution (PM10) and (PM2.5) - This page supplies information and resources to particle pollution.

  5. News for PM2.5


    1. China.org.cn ‎- 1 day ago
      It's another day of heavy smog here in Beijing with the city's weather bureau issuing a yellow haze alert. Levels of PM2.5 particles are above ...

  6. Air Info Now: What is Particulate Matter

    www.airinfonow.org/html/ed_particulate.html‎
    These particles are called PM2.5 (we say "P M two point five", as in Particulate Matter up to 2.5 micrometers in size). Where particulate matter comes from .

  7. PM2.5 - 百度百科

    baike.baidu.com/view/1423678.htm‎
    Translate this page
    细颗粒物又称细粒、细颗粒。PM2.5：指环境空气中空气动力学当量直径小于等于2.5 μm （微米）的颗粒物，也称细颗粒物。这个值越高，就代表空气污染越严重。可吸入 ...

  8. PM2.5: Invisible Killer - CNTV English - CCTV.com English

    english.cntv.cn/special/pm25/index.shtml‎
    As China enjoys an economic boom, air pollution has become a serious problem, China's capital city currently embroiled in a fierce public debate over the ...

  9. PSI Reading - National Environment Agency

    www.nea.gov.sg/psi/‎
    Temp | Wind | Rainfall | Humidity | UV Index. 24hr PSI & PM2.5 Concentrations. at 7 AM on 26 Sep 13. 24-hr PSI: 33-41, 3-hr PSI: 30 at 7 AM on 26 Sep 13.

  10. PM2.5 SIP Development - Division of Air Quality - Utah.gov

    www.airquality.utah.gov › Public Interest‎
    DAQ Home > Public Interest > PM2.5. PM2.5 SIP Development. | Background | Contact Us | Intro | SIP Development | Timeline |. After the Environmental ...

  11. Extremely High Levels of PM2.5: Steps to Reduce Your Exposure

    beijing.usembassy-china.org.cn › News › Environment & Climate Change‎
    Extremely High Levels of PM2.5: Steps to Reduce Your Exposure. The U.S. AQI does not include recommendations for PM2.5 levels above 500, but levels are ...