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PM-10 (Standard Conditions) Hourly Averages

Particle pollution (also called particulate matter or PM) is the term for a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, soot, or smoke, are large or dark enough to be seen with the naked eye. Others are so small, they can only be detected using an electron microscope. Particle pollution includes inhalable coarse particles, with diameters larger than 2.5 micrometers and smaller than 10 micrometers and fine particles, with diameters that are 2.5 micrometers and smaller. How small is 2.5 micrometers? Think about a single hair from your head. The average human hair is about 70 micrometers in diameter -- making it 30 times larger than the largest fine particle. These particles come in many sizes and shapes and can be made up of hundreds of different chemicals. Some particles, known as primary particles, are emitted directly from a source, such as construction sites, unpaved roads, fields, smokestacks or fires. Others form in complicated reactions in the atmosphere of chemicals such as sulfur dioxides and nitrogen oxides that are emitted from power plants, industries and automobiles. These particles, known as secondary particles, make up most of the fine particle pollution in the country.

Coarse particulates (PM-10) come from sources such as windblown dust from the desert or agricultural fields (sand storms) and dust kicked up on unpaved roads by vehicle traffic. PM-10 data is the near real-time measurement of particulate matter 10 microns or less in size from the surrounding air. This measurement is made at standard conditions, meaning it is corrected for local temperature and pressure.

Use the controls below to select a different date or parameter and to control cell highlighting based on measured PM-10 (Standard Conditions) levels. Click on the Generate Report button once you have made your selections.

Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
Select a date: Time Format: Select a Parameter:
   
PM-10 (Standard Conditions) Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy   Hazardous  
Highlight validated data (Validated data has been manually reviewed by a data validator)
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PM-10 (Standard Conditions) Hourly Averages for Friday, August 18, 2017.
measured in micrograms per cubic meter (25 c)
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:00
CA-NV-AZ-HI-AS-GU - refer to the first data column for each site's specific time zone
PST1018  1 16.1316.2710.0812.1512.9116.6619.6317.9017.769.3814.9811.1713.9820.279.5413.0010.0612.139.5916.0914.97 FEW NA 1018  1 4 R Oth Gov
PST1026  2 28.2734.2823.3530.4934.6727.8172.2544.4973.9231.3975.9934.3632.4118.7623.0414.3320.2237.3620.6140.8120.57 FEW NA 1026  2 1 N Oth Gov
PST1028  3 13.0912.9114.2614.5514.6312.9112.4920.9531.4026.1918.889.2811.578.346.979.689.4110.3712.3113.1610.96 FEW NA 1028  3 1 R Oth Gov
MST1030  4 21.9574.6346.4528.7713.5922.6447.8863.9818.5921.3811.2115.3415.6619.7015.6614.3122.1815.8316.6814.4450.2339.97 FEW 1030  4 3 N Oth Gov
PST2010  5 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 2010  5 1 R TREX
PST8000  6 5.144.587.375.394.867.877.604.655.165.547.168.5316.8614.3110.195.195.273.464.656.417.91 FEW NA 8000  6 3 N Oth Gov
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:00
WA-OR-ID-AK - all times are in PST
20  7 28.1423.3320.0317.1111.5125.6930.2035.4344.4839.3957.1032.6736.1536.3829.4025.8219.1926.7478.5557.5528.20 FEW NA 20  7 3 N Oth Gov
Notes:
- These sites are maintained and operated by the Lone Pine Paiute-Shoshone Tribe.
- These sites are maintained and operated by Pyramid Lake Paiute Tribe.
- These sites are maintained and operated by Fort Independence Paiute Tribe.
- These sites are maintained and operated by Fort McDowell Yavapai Nation.
- These sites are maintained and operated by Reno Sparks Indian Colony Planning/Environmental Program.
- These sites are maintained and operated by Las Vegas Paiute Tribe.
- These sites are maintained and operated by Shoshone Bannock Tribes.

TREX does not certify the validity or quality of data it hosts from other monitoring entities.
Maximum values for the day are bold within the table. Minimum values are bold italic.
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

Key to PM-10 (Standard Conditions) Highlight Colors:

The color-coding of the hourly PM-10 data is based on a 1-hour to 24-hour projection. This projection is based on statistics compiled over several years comparing the daily maximum 1-hour average to the midnight-to-midnight 24-hour average.
The table below shows the levels, color-coding, and suggested actions for both the 1-hour projection and the actual 24-hour standard.

Color Air Quality Rating 1-Hour
Average
(µg/m³)
24-Hour
Average
(µg/m³)
Actions to take
Moderate 55 - 154 55 - 154
  • No health impacts are expected when levels are within this range.
  • No health impacts are expected when levels are within this range.

PLEASE NOTE: This data has not been verified by the TREX and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TREX ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.