ADEQ purchases what it needs in two basic ways. For more ordinary goods and services, ADEQ uses vendors that have been awarded state contracts from the Arizona State Procurement Office (SPO) . For more specialized goods and services that are not provided for by state contracts, ADEQ does its own procurement.

When ADEQ, or any other state agency, performs procurements over $50,000, we use the SPO bidder's list. You do not have to register with SPO to do business with ADEQ, but you are much more likely to hear of opportunities if you do. Registration is easy and free. To obtain a registration form, please contact the Arizona State Procurement Office - (602) 542-5511.

Procurements between $5,000 and $50,000 are made through small businesses when practicable. "A small business is one that, including its affiliates, is independently owned and operated, is not dominant in the type of business it conducts, and which employs fewer than 100 full time employees or which has gross receipts of less than $4 million in its last fiscal year."