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Particulate Matter 2.5 and Particulate Matter 10

"Particulate Matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets. Particle pollution is made up of a number of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil or dust particles. (Those less than 10 micrometers in diameter (PM10) are so small that they can get into the lungs, potentially causing serious health problems. Ten micrometers is smaller than the width of a single human hair.)

The size of particles is directly linked to their potential for causing health problems. EPA is concerned about particles that are 10 micrometers in diameter or smaller because those are the particles that generally pass through the throat and nose and enter the lungs. Once inhaled, these particles can affect the heart and lungs and cause serious health effects. EPA groups particle pollution into two categories:

"Inhalable coarse particles," such as those found near roadways and dusty industries, are larger than 2.5 micrometers and smaller than 10 micrometers in diameter. (Sources of coarse particles include crushing or grinding operations, and dust stirred up by vehicles traveling on roads.)


"Fine particles," such as those found in smoke and haze, are 2.5 micrometers in diameter and smaller. These particles can be directly emitted from sources such as forest fires, or they can form when gases emitted from power plants, industries and automobiles react in the air. (Fine particles (PM2.5). Particles less than 2.5 micrometers in diameter are called "fine" particles. These particles are so small they can be detected only with an electron microscope. Sources of fine particles include all types of combustion, including motor vehicles, power plants, residential wood burning, forest fires, agricultural burning, and some industrial processes.)

 

Houston Texas TCEQ Air Quality Index PM 2.5 VS  Dylos Air Quality Monitors

Air Quality Index

Houston Metropolitan Area - Houston Galveston Brazoria

http://www.tceq.state.tx.us/cgi-bin/compliance/monops/aqi_rpt.pl?metro:1:2008:1:5

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PM 2.5 Measurement Park Place

EPA site number: 48-201-0416 Park Place C416

http://www.tceq.state.tx.us/cgi-bin/compliance/monops/site_photo.pl?cams=416

PM-2.5 Acceptable is measured at local pressure and temperature conditions.

Park Place is the closest reporting station for PM2.5 and the prevailing winds blow in our direction.

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http://www.airnow.gov/index.cfm?action=airnow.showlocal&CityID=105

pm25-24a-hou.gif (230557 bytes)

Houston Galveston Brazoria - Air Quality Index for PM 2.5 Jan 27, 2008

 

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dylos-air-quality-monitor-01-27-2008.jpg (65138 bytes)

Dylos Air Quality Monitors Jan 27, 2008  6 PM

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Black Color ---  Good Conditions Outdoors
Red Color --- Sensitive people, such as those with asthma, should consider limiting outdoor activity.

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TCEQ State of Texas EPA Sites

24 Hour Air Quality Index for PM 2.5

http://www.tceq.state.tx.us/cgi-bin/compliance/monops/aqi_rpt.pl

 

TCEQ

EPA Site Park Place C416

24 Hour Air Quality Index for PM 2.5

PM 2.5        Particles <2.5 ug/m3

http://www.tceq.state.tx.us/cgi-bin/compliance/monops/site_photo.pl?cams=416

 

 
 
 

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Date TCEQ

EPA Site Park Place C416

24 Hour Air Quality Index for PM 2.5

PM2.5

PM 2.5

Particles <2.5 ug/m3

EPA Site Park Place C416

Dylos Air Quality Monitor

All Lung Damaging Dust (0.5-7 microns)

>0.5 microns particles/ft3

Dylos Air Quality Monitor

>1.0 microns particles/ft3

Dylos Air Quality Monitor

Pollen/Mold

>5.0 microns particles/ft3

01/27/2008 62 21.07

3:00 PM

&

12.88

6:00 PM

1,217,100

3:00 PM

&

745,400

6:00 PM

189,200

3:00 PM

&

32,000

6:00 PM

700

3:00 PM

&

400

6:00 PM

02/05/2008

10:00 am

29 11.77 439,800 107,200 4,000

High Cedar Tree Pollen

02/10/2008

9:00 am

52 7.3

9:00 am

&

18.62

4:45 pm

558,600

9:00 am

&

438,100

4:45 pm

60,800

9:00 am

&

24,000

4:45 pm

700

9:00 am

High Cedar Tree Pollen

1000

4:45 am

02/25/2008

8:00 pm

Very Bad Air

53 22.04

8:00 pm

 

894,000

8:00 pm

 

49,600

8:00 pm

 

1600

8:00 pm

High Pollen

 

  24 Hour Air Quality Index for PM 2.5 <2.5 ug/m3 >0.5 microns particles/ft3 >1.0 microns particles/ft3 >5.0 microns particles/ft3
02/26/2008

11:00 pm

Very Clean Air - Cold Front from the NW

27 2.59 41,900 5,700 300
02/28/2008

2:00 pm

Very Clean Air

18 3.63 50,000   1500

High Pollen

03/19/2008

3:00 am

Very Clean Air

rained the day before and a cold front bring clean air

  2.22 27,400   200
03/19/2008

8:00 am

  7.30 324,000   400
03/19/2008

1:00 pm

    221,700   300
           
           
           
           
           
           
           
           
           
           

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