30 Aug 2018 --- Today (August 30) marks the start of the full effect of Proposition 65 (Prop 65) in the State of California which requires companies to call out specific names of potentially harmful chemicals that have been included on the list and add a warning symbol on the product if they exceed acceptable levels. Also known as the Safe Drinking Water and Toxic Enforcement Act, the full effect of Prop 65 has been a long time coming and today marks the beginning of the regulation that was initially adopted in the US in August 2016. It is the dawn of a new set of rules governing California Prop 65 warning labels that will go into effect today and apply to products manufactured after today’s date.