Water and Environmental The diversity of the microbial world is well-represented in the ATCC microbiology collections, including strains used for water and environmental testing, bioremediation, and extremophile research. Environmental Testing Use ATCC microbial strains to analyze the complex relationship between microbes and their impact on local environments. Water Testing ATCC offers a broad range of microbial strains for use in water testing, including Enterococcus, Escherichia, Proteus, and Giardia species.