Iowa Code § 190.4: Adulterations of dairy products.

In addition to the adulterations enumerated in section 190.3, milk, cream, or skimmed milk shall be deemed to be adulterated:

1. If it contains visible dirt or is kept or placed at any time in an unclean container.

2. If obtained from a cow within fifteen days before or five days after calving.

3. If obtained from a cow stabled in an unhealthful place, or fed upon any substance in a state of putrefaction or of unhealthful nature.

4. If obtained from a cow which has consumed chemical, medicinal, or radioactive agents capable of being secreted in milk.

5. If obtained from a cow in a mastitic condition.