Safe Home BACTERIA in Water Test Kit (DIY Testing) Protect Your Family from Bacteria (Total Coliform & E. Coli). Quarterly Testing Recommended. Safe & Easy to Use on Any Water Source at Home or During Travel. Tri-Lingual Instructions. Made in the USA and Named one of Top Nine New Products at the National Hardware Show. Patented Technologies that Detect Bacteria Down to 1 CFU (Colony Forming Unit). Trusted Accuracy for Results in *24 Hours (*Speed of Results May Vary). Over 3-Million Tests Sold.