9707938d_Their_Potential_Health_Effects___Contaminant_in_Drinking_Water
[Contaminant] Heterotrophic plate count [MCL or TT1 (mg/L)2] TT3 HPC has no health effects; it is an analytic method used to measure the variety of bacteria that are common in water. The lower the concentration of bacteria in drinking water, the better maintained the water system is.
HPC measures a range of bacteria that are naturally present in the environment
Overview of Contaminants & Their Potential Health Effects
Sources of Contaminant in Drinking Water