OSP was recently engaged by a client to conduct microbial assessments on three source water options being evaluated for an upcoming frac. Utilizing both LifeCheck DNA qPCR and 16S Sequencing, the technical team was able to discern microbial loads and overall threat levels within the three provided samples. Sample one and two revealed moderate microbial loads, with the microbial community composition being non-threatening. Sample three however, contained elevated levels of souring and MIC-threatening microbes particularly sulfide producing bacteria. The recommendation back to the client based on the observed data was both Sample one and Sample two were ideal candidates for source water for operations within their upcoming frac. Sample three poses a high risk based upon the elevated levels of souring and MIC-threatening sulfide producers and if selected, a robust microbial control program will need to be applied as well as routine microbial monitoring.