Harmsco® LT2 cartridges and housings exceed the three-log (99.9%) removal requirement described in LT2 ESWTR Toolbox Guidance Manual 8.4.1. for cyst-sized particles. For this reason, Harmsco LT2 filter cartridge elements are ideal to control cryptosporidium, giardia cysts and other harmful microorganisms to help ensure safe drinking water in communities , residences , hospitals.