Use the Bacteria/Nitrate/Nitrite Water Test Kit to see if your water is safe from coliform bacteria or to determine the presence and quantity of nitrates/nitrites. Easy to use test strips for quick and accurate results. A color change from purple to yellow indicates the presence of harmful coliform bacteria. (Contains 1 test). It includes a "color comparison" test strip to see if there are nitrate/nitrites, and the approximate levels. (Contains 2 tests). Manufacturer: American Water Service, LLC
Technical questions: 800-866-5192, results@puretest.com