Professional Bacteria & Water Test Kit, Easy To Use, Do It Yourself Test Identifies Dangerous Bacteria In 48 Hours, Offers 2 Types Of Analytical Methods, The First Method Simply Involves Counting The Number Of Colonies That Are Growing On The Petri Dish, The Second Method Optional Requires Sending The Petri Dish To Pro-Lab For A More Detailed Analysis Which Will Identify The Bacteria Present In Your Water, EPA Approved Lab Methods, Contains Petri Dish, Bacteria Medium, Calibrated Pipette/Dropper, Information Form.