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The air quality monitoring site in Liberty Lake is located on the roof of the Liberty Lake Sewer and Water District pump house on Valley Way. You should be able to see the wind vane/anemometer and the sampler on top of the building. There is a closer look at the equipment below. The weather data collected is shared with the Liberty Lake Sewer and Water District which they use for their water studies. We appreciate this partnership with the District!
Spokane Clean Air has been monitoring air quality in Liberty Lake since 2001. The site collects data on particulate matter concentrations. Liberty lake is a good location for this as it is impacted by agricultural burning in Idaho, by silvicultural debris burning in the surrounding forests and by local sources such as wood stoves and traffic. The cooling effect of the lake and the basin in which the lake sits can draw in and trap pollution in the area.
In addition to a continuous PM2.5 sampler,  Spokane Clean Air is operating a Partisol®-Plus Sequential Dichotomous Sampler manufactured by Rupprecht & Patashnick Co., Inc. It allows us to collect both fine particulate (0-2.5µm) and coarse particulate (2.5-10µm) at the same time with one sampler. The air sample is split, with fine particulate going to one filter and coarse to another. A sample is taken every third day from midnight to midnight. This is a manual method that requires manual collection of the filters. The filters are then analyzed to determine the level of pollutants in the air.
Select from the list below to see a table of the particulate data collected each year. We will update the data every few weeks. Some additional information that will be helpful in looking at the following data is the federal standards for particulate matter. The standard for PM2.5, the same as the Fine PM below, is an average of 35 µg/m3 of air for a 24-hour period. The standard for PM10 is 150 µg/m3. There is no standard for Coarse PM.
Liberty Lake Data
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