The heterotrophic plate count (HPC), formerly known as the standard plate count is a procedure for estimating the number of live heterotrophic bacteria in water and measuring changes during water treatment, in distribution systems or in swimming pools. R-2A Agar is recommended by APHA for estimating the heterotrophic plate count by the pour plate, spread plate or membrane filter procedure. R-2A HiCynth™ Agar is the modification of R-2A Agar by replacing animal peptones with chemically defined peptones to avoid BSE/TSE/GMO risk.
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