DENR Issues Guidelines for the Designation of Attainment and Non-attainment Areas in an Airshed
Environment and Natural Resources Secretary Michael Defensor recently released the guidelines for the designation of attainment and non-attainment areas in an airshed. DENR Memorandum Circular No, 013, series of 2005 issued last September 12, 2005, sets the guidelines for the designation. Said designation of airsheds shall be based on the monitoring data collected, using the reference and other equivalent methods approved by the DENR’s Environmental Management Bureau (EMB) pursuant to Part II of the DENR Administrative Order 2000-81 and/or other relevant information, including meteorological and other data covering the existing nearby sources of air pollution.
Attainment Areas in an airshed are those that comply with the so-called criteria pollutants for which National Ambient Air Quality Guidelines Values have been established, for the protection of public health, safety and general welfare. Until officially classified, areas that are not yet classified due to incomplete or invalid data are also included. Non-attainment areas are those that do not comply with the said guideline values, excluding those with samples affected by natural, human-made or induced events/activity. The National Ambient Air Quality Guidelines Values identify the criteria pollutants as Total Suspended Particulate, Particulate Matter of 10 microns in diameter or smaller, Sulfur Dioxide, Nitrogen Dioxide, photochemical oxidants like Ozone, Carbon Monoxide, and Lead.
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