At least once every thirty days an estimate of the bacterial quality shall be made of each producer’s milk by use of a standard plate count or an equivalent plate counting procedure in an officially designated laboratory.

For the purpose of quality improvement and payment, the following classifications of milk for bacterial estimate are applicable: Bacterial EstimateStandard Plate Count Classificationor Equivalent _____________________________________________________Class 1Not over 100,000 per Milliliter Class 2Not over 300,000 per Milliliter UndergradeOver 300,000 per Milliliter

[C62, 66, 71, 73, 75, 77, 79, 81, §194.6] 84 Acts, ch 1120, §1; 92 Acts, ch 1081, §3