Air retention efficiency of 99.95 percent of 0.3 µm size particulates Selected by the U.S. Environmental Protection Agency (EPA) for use in a nationwide network of HiVol air samplers Manufactured according to ISO9001:2008 QMS standards Available in both sheet and circle design Binderfree Cytiva's Whatman EPM 2000 air filters are used in highvolume PM10 sampling equipment. Manufactured from 100% pure borosilicate glass, they enable detailed chemical analysis of trace pollutants with minimal interference. Whatman EPM 2000 PM10 air sampler filter sizes EPM 2000 from Cytiva's business is available as 100piece packs of either 47 mm filter paper circles or 8 × 10 inch sheets.