APCAC PMTalk

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PM2.5 Air Pollution in Montana: 

PM2.5 Air Pollution in Montana Bob Jeffrey Montana Department of Environmental Quality

Discussion Topics: 

Ambient Air Quality Standards Particulate Matter (PM) TSP, PM10 & PM2.5 Review PM2.5 NAAQS Compliance Review Internet Information Sources Question and Answer Session Discussion Topics

Ambient Air Quality Standards: 

Ambient Air Quality Standards Primary Standards protect human health - including ‘sensitive’ populations with health issues, such as children and senior citizens.

Ambient Air Quality Standards: 

Ambient Air Quality Standards Secondary Standards protect public welfare (e.g. crops, buildings, visibility)

PARTICULATE MATTER (PM): 

PARTICULATE MATTER (PM) Complex mixture of extremely small solid particles and drops of liquid in the air Human Hair (70 µm diameter) PM10 (10µm) Hair cross section (70 mm)

Total Suspended Particulate (TSP): 

Total Suspended Particulate (TSP) TSP particle size < ~45-50 Microns TSP NAAQS initially set in 1971 24-hour primary standard = 260 µg/m3 Annual primary standard = 75 µg/m3 Secondary 24-hr standard = 150 µg/m3 TSP replaced by PM10 in 1987

Exceptional Events: 

Exceptional Events Mount St. Helens 18-23 May 1980 Helena TSP data ~7,900 – 300 µg/m3 Missoula TSP data ~9,300 – 400 µg/m3 Butte TSP data ~3,400 – 250 µg/m3

Particulate Matter <10 microns (PM10): 

Particulate Matter <10 microns (PM10) PM10 NAAQS initially set in 1987 24-hour standard = 150 µg/m3 Annual standard = 50 µg/m3 Revised NAAQS effective 18 Dec.2006 24-hour standard retained Annual standard revoked

Current PM10 Non-attainment Areas and Historic Violation Values (max 24-hr): 

Current PM10 Non-attainment Areas and Historic Violation Values (max 24-hr) Whitefish = 333 µg/m3 Butte = 302 µg/m3 Thompson Falls = 261 µg/m3 Kalispell = 260 µg/m3 Libby = 256 µg/m3 Missoula = 239 µg/m3 Columbia Falls = 186 µg/m3 Tribal NAA = Lame Deer, Polson & Ronan

Particulate Matter <2.5 Microns (PM2.5): 

Particulate Matter <2.5 Microns (PM2.5) PM2.5 NAAQ established in 1997 24-hour PM2.5 standard = 65 µg/m3 Annual PM2.5 standard = 15 µg/m3 Revised NAAQS effective 18 Dec. 2006 24-hour PM2.5 standard = 35 µg/m3 Annual PM2.5 standard = 15 µg/m3

PM2.5 Air Pollution Sources: 

PM2.5 Air Pollution Sources

9 February 2004 Hamilton FRM [PM2.5] = 4.1µg/m3: 

9 February 2004 Hamilton FRM [PM2.5] = 4.1µg/m3

16 January 2004 Hamilton FRM [PM2.5] = 45.5µg/m3: 

16 January 2004 Hamilton FRM [PM2.5] = 45.5µg/m3

PM2.5 NAAQS Compliance Review: 

PM2.5 NAAQS Compliance Review Libby 24-Hr Avg. 2004-6 = 43.1 µg/m3 Missoula 24-Hr Avg. 2004-6 = 41.2 µg/m3 Hamilton 24-Hr Avg. = 37.7 µg/m3 12/18/07: Montana submits NAA list to EPA 12/18/08: EPA makes final NAA decisions EPA will evaluate 2007 data

Libby PM2.5 Source Contribution Estimates : 

Libby PM2.5 Source Contribution Estimates

DRAFT – Hamilton PM2.5 Source Contribution Estimates : 

DRAFT – Hamilton PM2.5 Source Contribution Estimates

DRAFT – Missoula PM2.5 Source Contribution Estimates : 

DRAFT – Missoula PM2.5 Source Contribution Estimates

http://www.deq.mt.gov/AirQuality/AQinfo.asp: 

http://www.deq.mt.gov/AirQuality/AQinfo.asp

http://www.epa.gov/air/data/index.html: 

http://www.epa.gov/air/data/index.html

Questions?: 

Questions? Robert K. Jeffrey Montana Dept. of Environmental Quality Air Resources Management Bureau Telephone: 406-444-5280 Email: rjeffrey@mt.gov http://www.deq.mt.gov/AirQuality/AQinfo.asp