Municipal water treatment plants will spend US$4.5 billion on filtration and separation equipment in 2012. According to the McIlvaine Co, the cross-flow membranes market will reach US$1698.20 million this year, while the cartridge market will be worth US$732.73 million, the macrofiltration market US$1477.09 million and the sedimentation market US$587.45 million. Source: workingwithwater.filtsep.com
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http://workingwithwater.filtsep.com/view/24086/municipal-water-treatment-filtration-and-separation-market-worth-us45bn/