All gasoline engine powered pressure washers must now meet strict rules and regulations in the United States and in California for emissions. They must also be approved for emission compliance to be sold anywhere in the US or California. The USEPA (Environmental Protection Agency) issues the Certificate of Conformity for compliance for 49 states (all states except California). California issues Executive Orders (EO’s) for all machines that will be sold into California of bought in California. It is important to verify that the pressure washer that you are considering purchasing in California has an EO issued from CARB (California Air Resources Board). If the pressure washer is only EPA approved for 49 state sales then it can’t be bought or sold and used in California. You would be in violation and could be fined as well as the company buying and reselling. Make sure you buy an approved pressure washer when contemplating your next purchase. If you are not in California then make sure the pressure washer system is EPA approved with a Certificate of Conformity to ensure that you have a complying system. All of Hydro Tek Pressure Washers Systems are USEPA and CARB compliant machines.