Agree this would be a great thread on its own partly because educating people more on this topic is important before they rush out to buy the supplies with zero understanding of sterile technique and then try to hang a vendor for having a contaminated product when they were the problem.
Micro labs have special equipment and ventilation that might be used for these things because even a mote of dust carries bacteria. Even invisible droplets from your breath carry them. The entire environment including the sky is just filled with mold, viruses and bacteria. I like the idea of the testing but I am picturing someone not washing their hands, their cat running around while they run their samples and then showing the community the horrible evidence that So-and-so vendor sells dangerous product.