Raw Milk quality tests

The following list is a summary of the most important raw milk quality tests. Procedures for some milk quality tests are described in Process and quality control procedures.

  1. Organoleptic
  2. Total plate counts: good < 3,000/ml; maximum raw milk 100,000
  3. Coliforms: good < 10/ml; concern > 25; max 100
  4. Psychrotrophes (grow at T < 7C): good < 1,000
  5. Somatic cell counts: good <100,000; concern >300,000;
  6. Rapid test for inhibitors
  7. Disk assay (official test for inhibitors)
  8. Added water: maximum freezing point -0.505C (-525H)
  9. Composition: fat, protein, lactose, total solids, and casein if possible.