Because of topography, weather and a large number of woodstoves, the Klamath
Falls area has a long history of identifying problems with particulate
pollutions and working to solve them. With increased understanding of the health
effects of particulates, EPA has made the standards more protective over time,
addressing smaller sized particles that are the most hazardous but more
difficult to control. Since 1994, the Klamath Falls area has attained the larger
or coarse (PM10) particulate matter standard.
In 2009, with the adoption of a fine particulate (PM2.5) matter standard, EPA changed the legal
status of the Klamath Falls Area from attainment (meeting air quality standards)
to nonattainment (not meeting air quality standards) for fine particulate matter
(PM2.5). DEQ has adopted an attainment plan with associated
regulations to ensure that the Klamath Falls area meets the current
PM2.5 standard.
2012 Klamath Falls Fine Particulate Matter Attainment Plan
Adopted Dec. 6, 2012
Klamath Falls Fine Particulate Matter Attainment Plan
Appendix 1. Klamath Falls PM10 and PM2.5 Saturation Survey Report – 1996-1997
Appendix 2. Klamath Falls PM2.5 Particulate Site Validation Study - 2000-2001
Appendix 3-1. Klamath Falls 2010-2011 PM2.5 Survey
Appendix 3-2. Klamath Falls 2010-11 PM2.5 Survey - Appendix A - Site Photos
Appendix 4. Klamath Falls PM2.5 Levels Compared to Background Concentrations
Appendix 5. SANDWICH Analysis and Speciation
Appendix 6-1. Secondary Organic Aerosols
Appendix 6-2. Discussions on the Potential Contribution of Secondary Organic Aerosol (including organonitrates) to PM2.5 in Klamath Falls
Appendix 7. Report on PM2.5 Receptor Modeling in Klamath Falls
Appendix 8. Economic Trends in Klamath Falls
Appendix 9. How Klamath Falls’ Topography and Winter Meteorology Elevate PM2.5 and Consideration of 2008 as a Base Year
Appendix 10-1. Klamath Falls 2008 Oregon Woodheating Survey
Appendix 10-2. Klamath Falls 2008 Oregon Woodheating Survey (Appendix A-1)
Appendix 10-3. Klamath Falls 2008 Oregon Woodheating Survey (Appendix A-2)
Appendix 10-4. Klamath Falls 2008 Oregon Woodheating Survey (Appendix B)
Appendix 11. Klamath Falls Emission inventory and Forecast
Appendix 12. Potential Contribution of Prescribed Burning on Klamath Falls Design Value Days
Appendix 13. Effective Emissions
Appendix 14. Woodstove Reductions and the Klamath County Ordinance
Appendix 15-1. RACT-RACM
Appendix 15-2. RACM Analysis
Appendix 15-3. List of Rejected RACT-RACM Measures by the Advisory Committee
Appendix 16. Klamath Air Quality Advisory Committee (KAQAC) Report
Appendix 17-1. Klamath County Ordinance 2007
Appendix 17-2. Klamath County Ordinance 2012
Appendix 18. Klamath County Intergovernmental Agreement (IGA) 2013
Appendix 19-1. Oregon Administrative Rule - Division 204
Appendix 19-2. Oregon Administrative Rule - Division 225
Appendix 19-3. Oregon Administrative Rule - Division 240
Appendix 19-4. Oregon Administrative Rule - Division 262
Appendix 19-5. Oregon Administrative Rule - Division 264
Appendix 20. Klamath Falls Interagency Agreement to Reduce PM2.5 Emissions from Winter Sanding
Appendix 21. Design Value
Appendix 22. AERMOD Dispersion Modeling
Appendix 23-1. Rollback Modeling
Appendix 23-2. Rollback and Emission Reduction Measures
Appendix 24. Unmonitored Area Analysis
Appendix 25. Conformity – Determination of Insignificance for Klamath Falls
Appendix 26. References
For more information on the 2012 Klamath Falls Fine Particulate Matter Attainment Plan, contact Rachel Sakata, Air Quality Planner, 503-229-5659
Historical timeline
1991: The EQC adopts a PM10
attainment plan which includes emission reduction strategies for:
Woodstove and open burning curtailment, winter road sanding controls, public
education programs, and agreements with Forestry and Agriculture agencies. The
Klamath Falls Urban Growth Boundary is in nonattainment for PM10.
1994: Klamath Falls is in compliance with the standards.
1999: DEQ establishes a PM2.5 monitor in Klamath
Falls and monitors high levels of PM2.5 in the airshed.
2002 DEQ prepares and the EQC adopts a PM10
Maintenance Plan for Klamath Falls:
Klamath Falls UGB PM10 Maintenance Plan
Append. 6-1 to 6-8 combined
- Appendix 6-1 Technical Analysis Protocol
- Appendix 6-2 Klamath Falls UGB Monitoring Network
- Appendix 6-3 PM10 Saturation Survey
- Appendix 6-4 Emission Inventory and Forecast
- Appendix 6-5 Conformity
- Appendix 6-6 Population and Historical Growth Trends
- Appendix 6-7 Klamath County Ordinance and other agreements
- Appendix 6-8 Design Value and 2015 Projections
2003: EPA approves the Maintenance Plan and associated rules
for the Klamath Falls Maintenance area for coarse particulate matter
(PM10). The legal status of the Klamath Falls area changes from
nonattainment to attainment for PM10. The Urban Growth Boundary is
now in attainment for coarse particulate matter (PM10).
2006: EPA revises PM2.5 standard.
2007: Klamath County revises its Clean Air Ordinance which
further limits the use of woodburning devices inside the home and outdoor
burning during the winter months when high levels of PM2.5 are
evident. Woodstove replacement programs are implemented to help low income
individuals replace their uncertified woodstoves with cleaner units.
2009: Klamath Falls along with Oakridge are designated
Nonattainment for fine particulate matter
(PM2.5) by EPA. PM2.5 concentrations are high enough
to cause a violation of the 24 hour air quality standard also known as the National Ambient Air Quality Standard.
2011: DEQ conducted monitoring for Toxic Air Pollution and
found that many toxic air pollution tracked with days of high wood stove
pollution. See Fact Sheet describing Air Toxics in Klamath Falls.
2012: The EQC adopts the Klamath Falls PM2.5
Attainment Plan for Klamath Falls. The plan is submitted to the EPA.