ADEQ intends to update its public water system design and application process rules in 18 Arizona Administrative Code (A.A.C.) 5, Article 5, Minimum Design Criteria for Public Water Systems. ADEQ's rules for public water system Minimum Design also include Engineering Bulletins 8 and 10 via incorporation by reference in A.A.C. R18-5-502 | Learn More >

We invite stakeholders to participate and provide input during the rulemaking process.

Past Meeting Resources

• Sept. 1, 2026 — Virtual Engagement Session 5 (Project Process & Exemption Criteria) | View Sept. 1 Presentation >
• Aug. 13, 2026 — Virtual Engagement Session 4 (Engineering Bulletin 10, Chapter 7, and Engineering Bulletin 8: Distribution & Disinfection) | View Aug. 13 Presentation >
• July 16, 2026 — Virtual Engagement Session 3 (Engineering Bulletin 10, Chapter 4: Treatment) | View July 16 Presentation >
• June 9, 2026 — Virtual Engagement Session 2 (Engineering Bulletin 10, Chapters 3, 5, & 6: Pumping, Hydropneumatic Tanks, & Storage) | View June 9 Presentation >
• May 7, 2026 — Virtual Engagement Session 1 (Engineering Bulletin 10, Chapter 2: Source Development & Construction) | View May 7 Presentation >
• April 2, 2026 — Virtual Kick-off Meeting | View April 2 Presentation >

Other Resources

• Justification Guidance for Subject Matter Rule Recommendations | View Guidance >

Ways to Engage

• Rules Survey — Take the rule survey to provide input on these rules and technical documents | Take Survey >
• Contact the rulemaking team | Email >