Too Numerous To Count (TNTC) or Too Many To Counts (TMTC) In samples with very high bacterial concentration, that is not suitable for counting (unable to get accurate counts) and reports the results as "to numerous to count" (TNTC). While the best solution is to collect another sample and dilute to get a more accurate counts, this might not always to be possible. Ideally one plate with 200 to 250 colonies are used. Counts above 250 are considered "to numerous to count" (TNTC), because it is impossible to count the colonies. plates countable range 25 to 250. Too Few To Count (TFTC): If there are less than 30 colonies on the plate, small errors in dilution technique or the presence of a few contaminants will have a drastic effect on the final count this count is called too few to count (TFTC).