Receipts of Producer Milk by Regulated Handlers is the amount of producer milk in pounds that qualifies for pooling on each of the Federal Milk Marketing Orders each month. Each order has its own criteria that determines if a producer's milk is eligible to be pooled.  Butterfat Test of Producer Milk is the average percentage of butterfat contained in the producer milk pooled each month. Nonfat Solids Test of Producer Milk is the average percentage of nonfat solids (all milk solids other than butterfat) contained in the producer milk pooled each month. Protein (True) Test of Producer Milk is the average percentage of protein (true) contained in the producer milk pooled each month. Other Solids Test of Producer Milk is the average percentage of other solids (other than butterfat and protein (true). Nonfat Solids, Protein and Other Solids Test Data are only reported for those Federal Milk Marketing Orders that utilize multiple component pricing. Somatic Cell Count of Producer Milk is the average number of somatic cells per milliliter contained in the producer milk reported for those orders who utilize somatic cell counts in their milk pricing formulas.