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Oregon Department of Environmental Quality

Air Quality

Maintenance and Nonattainment 

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Klamath Falls

Klamath Falls Map
(Click to enlarge) Klamath Falls nonattainment area Boundary set by EPA 12/18/08. Klamath Falls Urban Growth Boundary and City Limit based on Oregon's Land Use Planning Laws

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.

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
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 Ari Quality Standard (NAAQS).

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.

[print version]

For more information about DEQ's Eastern Region call Larry Calkins at 541-278-4612 or email.

For more information about Air Quality call 503-229-5696

For reporting pollution problems contact Complaints

For technical assistance contact DEQINFO

Oregon Department of Environmental Quality
Headquarters: 700 NE Multnomah Street, Suite 600, Portland, OR 97232
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

The Oregon Department of Environmental Quality is a regulatory agency authorized to protect Oregon's environment by
the State of Oregon and the Environmental Protection Agency.

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