We received the following question about the EZ-Cult Coliform Bacteria Test Kit recently:
"I have received your well water test kit and conducted the test as instructed. After the 48 hours has expired, I still have a yellow sample, which, according to the instructions provided indicates I have a negative negative coliform in my water. Why do I need a uv light to check any further? I don't even know what a uv light is. I would appreciate an early reply."
To which we replied:
"The UV light (i.e. commonly referred to as a 'black light') is NOT a requirement. It would get used on a sample that turned during the incubation period and would let a person know if the sample specifically contained a coliform strain known as E. Coli. But, since your sample did not change color, you should not need a UV light."
The EZ-Cult Coliform Bacteria Test Kit tests down to 1 coliform unit per 100 milliliters of water sample which is the same detection level as mandated for drinking water systems by the USEPA.