Revised On: Dec. 8, 2023 - 4:10 p.m.

The Drinking Water Engineering Review Program conducts a detailed technical review of public water system designs in Arizona before and after construction to ensure the systems are designed and built to standards that provide safe, potable water to customers as required under the Safe Drinking Water Act (SDWA).

Drinking Water Systems Review

Public water system facilities comprise of waterlines, booster pumps, storage tanks, wells, and other structures and devices that treat, store and deliver drinking water to residential, commercial and industrial buildings. Prior to developing a new drinking water system or modifying an existing system (including the addition of new water sources), applicants must:

• Apply for and receive an "Approval to Construct" Certificate from ADEQ before construction begins.
• Apply for and receive an "Approval of Construction" before operating the new facility or component(s).

Learn more about Approval to Construct, Approval of Construction and design standards | Learn More >