The Arizona Department of Environmental Quality Safe Drinking Water rules allow public water systems to employ point-of-use (POU) treatment devices as a means for compliance with drinking water maximum contaminant levels (MCL). The Engineering Review Section conducts the technical review for proposed POU compliance programs. A POU compliance program is different than employing a centralized water treatment system to treat water to potable standards. Under a POU program, a public water system can install a POU device that will treat only the water intended for direct consumption, typically installed at a single tap such as the kitchen sink. In contrast, centralized treatment treats all of the water produced by the public water system. Since only a very small percentage of the total water use in a dwelling ends up as direct consumption (typically 1-3 percent) a POU compliance program can in certain situations result in significant cost savings. POU can therefore be an attractive compliance option for many small water systems.

ADEQ Form 222 is the Completeness Review Guide for Engineering Review that provides a quick overview of the requirements for application submittals for Point-of-Use systems. The design review of Point-of-Use systems is conducted by the ADEQ Phoenix Office, except in Maricopa County where design review is conducted by the Maricopa County Environmental Services Department .

As detailed in ADEQ Form 222, the primary components necessary to obtain an Approval to Install Certificate are:

• Point-of-Use System Plans
• Application form
• Design Report

The primary components necessary to obtain an Approval of Installation Certificate are:

• As-built Plans
• Engineer's Certificate of Completion

Brochures

• Form 222 - Submittal Checklist
• Point of Use Guidance Document

Design Standards

Several materials, construction, and testing standards are referenced by rule and bulletins for Point-of-Use installations. Listed below are some of the commonly utilized standards but is not exhaustive of all the standards referenced by rule.

• ADEQ Point of Use Guidance Document
• Maricopa Association of Governments Standards and Standard Details
• Pima County/City of Tucson Standard Details

Fees

There are currently no fees associated with Approvals Point of Use (POU) applications.

Forms

• Approval to Install Phase
  1. Application for Approval to Install (contact ADEQ)
• Approval of Installation Phase
  1. Application for Approval of Installation (contact ADEQ)
  2. Application for Approval of Construction/ECC

Rules and Statutes

• A.A.C. R18-5-422

Where to File Your Application

The design review of Point-of-Use systems is conducted by the ADEQ Phoenix Office, except in Maricopa County where design review is conducted by the Maricopa County Environmental Services Department .