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Monitoring Total Particulate Matter

We measure the total particulate mass concentration in the air on a routine basis as well as during incidents that may affect ambient air.

Air Quality Index - AQI

Employee Smoke Alert Los Alamos PM 2.5
24-hour Rolling Average
White Rock PM 2.5
24-hour Rolling Average
The current condition is: Error 1.3663 µg/m3 1.3718 µg/m3
Weather Forecast View Los Alamos data View White Rock data

AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air. EPA calculates the AQI for five major air pollutants regulated by the Clean Air Act.

White Rock PM 2.5: 1.3718 µg/m3 on Tuesday, January 31, 2023 9:30 AM White Rock PM 2.5: 1.3872 µg/m3 on Tuesday, January 31, 2023 9:00 AM White Rock PM 2.5: 1.3589 µg/m3 on Tuesday, January 31, 2023 8:30 AM White Rock PM 2.5: 1.3488 µg/m3 on Tuesday, January 31, 2023 8:00 AM White Rock PM 2.5: 1.3561 µg/m3 on Tuesday, January 31, 2023 7:30 AM White Rock PM 2.5: 1.3508 µg/m3 on Tuesday, January 31, 2023 7:00 AM White Rock PM 2.5: 1.3563 µg/m3 on Tuesday, January 31, 2023 6:30 AM White Rock PM 2.5: 1.3242 µg/m3 on Tuesday, January 31, 2023 6:00 AM White Rock PM 2.5: 1.3166 µg/m3 on Tuesday, January 31, 2023 5:30 AM White Rock PM 2.5: 1.2981 µg/m3 on Tuesday, January 31, 2023 5:00 AM White Rock PM 2.5: 1.2695 µg/m3 on Tuesday, January 31, 2023 4:30 AM White Rock PM 2.5: 1.2456 µg/m3 on Tuesday, January 31, 2023 4:00 AM White Rock PM 2.5: 1.2189 µg/m3 on Tuesday, January 31, 2023 3:30 AM White Rock PM 2.5: 1.2182 µg/m3 on Tuesday, January 31, 2023 3:00 AM White Rock PM 2.5: 1.205 µg/m3 on Tuesday, January 31, 2023 2:30 AM White Rock PM 2.5: 1.1975 µg/m3 on Tuesday, January 31, 2023 2:00 AM White Rock PM 2.5: 1.1892 µg/m3 on Tuesday, January 31, 2023 1:30 AM White Rock PM 2.5: 1.1787 µg/m3 on Tuesday, January 31, 2023 1:00 AM White Rock PM 2.5: 1.1653 µg/m3 on Tuesday, January 31, 2023 12:30 AM White Rock PM 2.5: 1.1761 µg/m3 on Tuesday, January 31, 2023 12:00 AM White Rock PM 2.5: 1.187 µg/m3 on Monday, January 30, 2023 11:30 PM White Rock PM 2.5: 1.2062 µg/m3 on Monday, January 30, 2023 11:00 PM White Rock PM 2.5: 1.2332 µg/m3 on Monday, January 30, 2023 10:30 PM White Rock PM 2.5: 1.2408 µg/m3 on Monday, January 30, 2023 10:00 PM White Rock PM 2.5: 1.245 µg/m3 on Monday, January 30, 2023 9:30 PM White Rock PM 2.5: 1.2597 µg/m3 on Monday, January 30, 2023 9:00 PM White Rock PM 2.5: 1.238 µg/m3 on Monday, January 30, 2023 8:30 PM White Rock PM 2.5: 1.2106 µg/m3 on Monday, January 30, 2023 8:00 PM White Rock PM 2.5: 1.1947 µg/m3 on Monday, January 30, 2023 7:30 PM White Rock PM 2.5: 1.2003 µg/m3 on Monday, January 30, 2023 7:00 PM White Rock PM 2.5: 1.199 µg/m3 on Monday, January 30, 2023 6:30 PM White Rock PM 2.5: 1.1822 µg/m3 on Monday, January 30, 2023 6:00 PM White Rock PM 2.5: 1.1996 µg/m3 on Monday, January 30, 2023 5:30 PM White Rock PM 2.5: 1.1467 µg/m3 on Monday, January 30, 2023 5:00 PM White Rock PM 2.5: 1.1663 µg/m3 on Monday, January 30, 2023 4:30 PM White Rock PM 2.5: 1.1658 µg/m3 on Monday, January 30, 2023 4:00 PM White Rock PM 2.5: 1.2076 µg/m3 on Monday, January 30, 2023 3:30 PM White Rock PM 2.5: 1.1928 µg/m3 on Monday, January 30, 2023 3:00 PM White Rock PM 2.5: 1.1722 µg/m3 on Monday, January 30, 2023 2:30 PM White Rock PM 2.5: 1.1632 µg/m3 on Monday, January 30, 2023 2:00 PM White Rock PM 2.5: 1.1553 µg/m3 on Monday, January 30, 2023 1:30 PM White Rock PM 2.5: 1.2063 µg/m3 on Monday, January 30, 2023 1:00 PM White Rock PM 2.5: 1.2295 µg/m3 on Monday, January 30, 2023 12:30 PM White Rock PM 2.5: 1.2109 µg/m3 on Monday, January 30, 2023 12:00 PM White Rock PM 2.5: 1.2272 µg/m3 on Monday, January 30, 2023 11:30 AM White Rock PM 2.5: 1.2087 µg/m3 on Monday, January 30, 2023 11:00 AM White Rock PM 2.5: 1.1612 µg/m3 on Monday, January 30, 2023 10:30 AM White Rock PM 2.5: 1.1281 µg/m3 on Monday, January 30, 2023 10:00 AM Los Alamos PM 2.5: 1.3582 µg/m3 on Tuesday, January 31, 2023 9:30 AM Los Alamos PM 2.5: 1.3508 µg/m3 on Tuesday, January 31, 2023 9:00 AM Los Alamos PM 2.5: 1.3089 µg/m3 on Tuesday, January 31, 2023 8:30 AM Los Alamos PM 2.5: 1.3027 µg/m3 on Tuesday, January 31, 2023 8:00 AM Los Alamos PM 2.5: 1.1863 µg/m3 on Tuesday, January 31, 2023 7:30 AM Los Alamos PM 2.5: 1.1485 µg/m3 on Tuesday, January 31, 2023 7:00 AM Los Alamos PM 2.5: 1.0976 µg/m3 on Tuesday, January 31, 2023 6:30 AM Los Alamos PM 2.5: 1.0492 µg/m3 on Tuesday, January 31, 2023 6:00 AM Los Alamos PM 2.5: 1.0045 µg/m3 on Tuesday, January 31, 2023 5:30 AM Los Alamos PM 2.5: 0.9784 µg/m3 on Tuesday, January 31, 2023 5:00 AM Los Alamos PM 2.5: 0.9725 µg/m3 on Tuesday, January 31, 2023 4:30 AM Los Alamos PM 2.5: 0.9763 µg/m3 on Tuesday, January 31, 2023 4:00 AM Los Alamos PM 2.5: 0.9394 µg/m3 on Tuesday, January 31, 2023 3:30 AM Los Alamos PM 2.5: 0.9499 µg/m3 on Tuesday, January 31, 2023 3:00 AM Los Alamos PM 2.5: 0.923 µg/m3 on Tuesday, January 31, 2023 2:30 AM Los Alamos PM 2.5: 0.9306 µg/m3 on Tuesday, January 31, 2023 2:00 AM Los Alamos PM 2.5: 0.9594 µg/m3 on Tuesday, January 31, 2023 1:30 AM Los Alamos PM 2.5: 0.9578 µg/m3 on Tuesday, January 31, 2023 1:00 AM Los Alamos PM 2.5: 0.9931 µg/m3 on Tuesday, January 31, 2023 12:30 AM Los Alamos PM 2.5: 0.9879 µg/m3 on Tuesday, January 31, 2023 12:00 AM Los Alamos PM 2.5: 0.9681 µg/m3 on Monday, January 30, 2023 11:30 PM Los Alamos PM 2.5: 0.9936 µg/m3 on Monday, January 30, 2023 11:00 PM Los Alamos PM 2.5: 1.0325 µg/m3 on Monday, January 30, 2023 10:30 PM Los Alamos PM 2.5: 1.0093 µg/m3 on Monday, January 30, 2023 10:00 PM Los Alamos PM 2.5: 0.9831 µg/m3 on Monday, January 30, 2023 9:30 PM Los Alamos PM 2.5: 0.9613 µg/m3 on Monday, January 30, 2023 9:00 PM Los Alamos PM 2.5: 0.9229 µg/m3 on Monday, January 30, 2023 8:30 PM Los Alamos PM 2.5: 0.9314 µg/m3 on Monday, January 30, 2023 8:00 PM Los Alamos PM 2.5: 0.934 µg/m3 on Monday, January 30, 2023 7:30 PM Los Alamos PM 2.5: 0.9023 µg/m3 on Monday, January 30, 2023 7:00 PM Los Alamos PM 2.5: 0.888 µg/m3 on Monday, January 30, 2023 6:30 PM Los Alamos PM 2.5: 0.8586 µg/m3 on Monday, January 30, 2023 6:00 PM Los Alamos PM 2.5: 0.8459 µg/m3 on Monday, January 30, 2023 5:30 PM Los Alamos PM 2.5: 0.8284 µg/m3 on Monday, January 30, 2023 5:00 PM Los Alamos PM 2.5: 0.8157 µg/m3 on Monday, January 30, 2023 4:30 PM Los Alamos PM 2.5: 0.8221 µg/m3 on Monday, January 30, 2023 4:00 PM Los Alamos PM 2.5: 0.8033 µg/m3 on Monday, January 30, 2023 3:30 PM Los Alamos PM 2.5: 0.8518 µg/m3 on Monday, January 30, 2023 3:00 PM Los Alamos PM 2.5: 0.8348 µg/m3 on Monday, January 30, 2023 2:30 PM Los Alamos PM 2.5: 0.8442 µg/m3 on Monday, January 30, 2023 2:00 PM Los Alamos PM 2.5: 0.8352 µg/m3 on Monday, January 30, 2023 1:30 PM Los Alamos PM 2.5: 0.8241 µg/m3 on Monday, January 30, 2023 1:00 PM Los Alamos PM 2.5: 0.8469 µg/m3 on Monday, January 30, 2023 12:30 PM Los Alamos PM 2.5: 0.8552 µg/m3 on Monday, January 30, 2023 12:00 PM Los Alamos PM 2.5: 0.8439 µg/m3 on Monday, January 30, 2023 11:30 AM Los Alamos PM 2.5: 0.7909 µg/m3 on Monday, January 30, 2023 11:00 AM
Air Quality and Work Activity Guidance

The air quality guidance below is published by the New Mexico Environmental Department. Work activity guidance has also been added by LANL's ADESH Directorate.

  • Indoor PM 2.5 equivalent particulate levels are normally 70-80% of outdoor levels unless HEPA filtered.
  • Health Levels are based on total PM 2.5.
  • All health related impacts are generalized and an individual's response to smoke may vary.
  • Managers and employees are encouraged to work together to assess any localized health risks that may result from exposure to ambient smoke and employee work activities, particularly with employees with preexisting health conditions as discussed in the chart below.
Condition Concentration PM 2.5 (µg/m3
24-hour average)
Air Quality Index Cautionary Statements Recommendations for Outdoor Work Activities
Good 0-12.0 0-50 None. None.
Moderate 12.1-35.4 51-100 Unusually sensitive people should consider reducing prolonged or heavy exertion. None.
Unhealthy for Sensitive Groups 35.5-55.4 101-150 Sensitive groups or individuals with preexisting conditions with heart or lung disease ( i.e. asthma), older adults, and children should reduce prolonged or heavy exertion. Sensitive individuals or individuals with preexisting health conditions aggravated by smoke are responsible for determining and moderating outdoor work effort/activity level.
Unhealthy 55.5-150.4 151-200 People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion.

Everyone else should reduce prolonged or heavy exertion.
Restrict outdoor work activities to light activity: i.e. light manual work with hands or arms, occasional walking.

Restrict Indoor and outdoor exercise and activity (Wellness Center closure).
Very Unhealthy 150.5-250.4 201-300 People with heart or lung disease ( i.e. asthma), older adults, and children should avoid all physical activity outdoors.

Everyone else should avoid prolonged or heavy exertion.
Hazardous 250.5-500.4 301-500 People with heart or lung disease ( i.e. asthma), older adults, and children remain indoors and keep activity levels low.

Everyone else should avoid all physical activity outdoors.
Wildfire Guidance

To address potential work time exposures to ambient particulate (smoke) generated from wild fires, the following guidance is offered:

  • Particulate from forest fires tend to be very small (0.4-0.7micrometers) and can add to or exacerbate many health conditions.
  • LANL currently measures ambient particulate levels in the Los Alamos town site at Los Alamos Medical Center and in White Rock using PM 2.5 micron, monitoring methods.
  • These monitoring results include contributions from smoke related particulate matter.
  • Rolling 24-hour PM 2.5 averages are updated every 30 minutes.
Learn more about Particulate Matter Sampling

LANL monitors the composition of particulate matter and volatile organic compounds in the ambient atmosphere in Los Alamos County and to provide better background data for these types of constituents for use in the event of an emergency. Data are downloaded from Tapered Element Oscillating Microbalance (TEOM) samplers every hour. In order to provide the most current data possible, the data have not been fully validated and verified. Two TEOM samplers are present at each sampling site:

  • PM 2.5
    • Used for measuring particulate matter less than 2.5 micrometers in diameter.
    • PM 2.5 measurements represent fine particles that are inhaled deeply into the lung. Sources of these fine particles include internal combustion engines, forest fires, power plants, and atmospheric processes such as condensation and smog formation.
  • PM 10
    • Used for measuring particulate matter less than 10 micrometers in diameter.
    • PM 10 measurements include the PM 2.5 particles and larger particles such as those produced from “mechanical” disturbances such as unpaved roads, construction activities, material handling, and wind storms.
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