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Comment Period

Microsoft MWH Data Center, Quincy

Air Quality Notice of Construction application

June 19, 2019 - July 19, 2019

​Para asistencia en español: preguntas@ecy.wa.gov

Microsoft MWH Data Center (MWH), located at 1515 Port Industrial Parkway in Quincy, currently has an air quality permit, Approval Order 18AQ-E024, to install and operate 117 diesel powered emergency generators, 32 cooling towers, and 136 evaporative coolers. The operating limitations and emission limits in the existing Approval Order are calculated based on the assumption that MWH may average annual fuel use and annual operating hours over a 3-year rolling period, meaning that theoretical maximum emissions are based on a worst-case year in which MWH would use three times the average annual fuel limit and operate three times the average annual hourly limit.
Microsoft submitted an application for revision to their Approval Order, proposing to remove MWH’s option to average annual usage over a rolling 3-year period and replace it with a rolling 12-month average. The proposed change to the operating limits represents a decrease in permitted worst-case annual emissions. Hourly emission limits and operating scenarios would not change. Nitrogen Oxides (NOx) emissions will be 73.3 tons per year, below Title V thresholds.

Ecology determined this project satisfies the requirements of Chapters 173-400 and 173-460 WAC, and the public is invited to comment. A public hearing will be held if Ecology determines there is significant public interest. 

See below for ways to comment. Comments submitted online, by email, or by mail are equally considered. Comments are due by 5 p.m. July 19, 2019.

The following documents are related to the project. They are also available at Quincy City Hall, 104 B St. SW, and the Quincy Library, 208 Central Ave S.:
Subscribe to the Quincy Data Centers Interested Parties ListServ email for updates.

This notice was posted on June 19, 2019.


A notice of construction permit is required before installing a new source of air pollution or modifying an existing source of air pollution.  This permit is sometimes called a "pre-construction permit" because a business must have one before starting construction or operating their business.

A notice of construction air permit limits the amount of air pollutants a business can emit.

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Comment online

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Comment by mail

Jenny Filipy
Washington Department of Ecology, Eastern Region
4601 N. Monroe St.
Spokane, WA 99205
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Jenny Filipy
Environmental Engineer

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