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Comment Period

TransAlta permit revision

Air Quality order/permit

May 20, 2020 - June 25, 2020, 11:59 p.m.

Ecology proposes to update TransAlta’s permit, called a BART (best available retrofit technology) order.

The proposed revision requires TransAlta to:

  • Install and operate a computerized combustion control system to lower emissions of nitrogen oxides and ammonia.
  • Remove requirements to test coal before using it because testing occurs where air pollution comes out.
  • Limit monitoring of ammonia.

Public comment period:  May 20, 2020 - June 25, 2020
Public hearing (if requested by June 19, 2020):  June 23, 2020 at 10 a.m.

Documents for review


TransAlta is a coal-fired power plant in Centralia. In 2011, the Legislature required TransAlta to shut down its coal-fired boilers in two phases. Ecology regulates air pollution from industrial facilities, including power plants. We monitor TransAlta's emissions.

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Comment online

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Comment by mail

Colleen Stinson
Washington Department of Ecology
Air Quality Program
P.O. Box 7600
Olympia, WA 98504-7600
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Colleen Stinson
Environmental Planner

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