If you've researched milk before, you've probably come across a so-called "fact" floating around that claims that "a glass of milk contains 135 million pus cells". In reality, what may be present in milk — both organic and regular — are white cells, not pus per se, and these are monitored by a somatic cell count (SCC). If a farm finds an elevated white blood cell present in the milk they produce, chances are the cows are indeed fighting an infection, and that translates into either 1. being paid less per batch of milk, or 2. their milk not being purchased at all. So no, there is no pus in the organic milk you buy at your local grocery store.