Acid Deposition


Additional monitoring is also conducted to measure acid deposition at two locations within the WCAS boundary. Acid deposition occurs when pollutants such as sulphur dioxide or nitrogen oxides emitted from natural and man-made processes react in the atmosphere and fall to the earth as wet deposition (rain, snow, cloud, fog) or dry deposition (dry particles, combustion and acid gases). When these pollutants react with water, oxygen, carbon dioxide and sunlight in the atmosphere, sulphuric and nitric acids are produced. these acids can be transported in the atmosphere from their sources and deposited both near to and far from their points of origin, where first emitted.

Alberta environment and Parks uses "potential Acid Input" to assess the level of acidic deposition to a given area. It is determined by measuring wet and dry deposition of acidic sulphur and nitrogen species and subtracting the deposition of neutralizing substances.

Air Quality Data

Date Range – From
Date Range – To