The Centers for Disease Control and Prevention recommends that all dental unit waterline microbial counts measure less than 500 colony-forming units per mL (500 CFU/mL) of water. This easy-to-use kit provides in-office results and describes how to resolve a poor rating. In addition, it offers assistance with establishing protocol for continued compliance. Water sample collector is made from clear plastic, filter captures microorganisms, absorbent pad inhibits microbial growth, and guide helps clinician interpret results.