http://blogs.washplus.org/drinkingwaterupdates/2012/01/removal-of-escherichia-coli-and-faecal-coliforms-from-surface-water-and-groundwater-by-household-water-treatment-devicessystems/ from the WASHplus Project Tue, 22 Sep 2015 12:34:42 +0000 hourly 1 http://wordpress.org/?v=3.1.4