Cal. Business and Professions Code § 12022

Every person who, in putting up in any container, goods usually sold by weight, puts in or conceals therein any other substance including moisture, except such moisture as may be included or absorbed by the goods or commodity contained therein during preparation for market or processing in accordance with ordinary commercial practice, for the purpose of increasing the weight of such container with intent thereby to sell the goods therein or to enable another to sell the same, for an increased weight, is punishable by a fine of not less than twenty-five dollars ($25) for each offense. The amount of added moisture contained in poultry meat as defined in Section 380.20 of the Agricultural Code shall not exceed 4 percent by weight or any greater amount established by regulation of the secretary.