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.

Upcoming Virtual Engagement Sessions

Join ADEQ during the following virtual engagment sessions to learn about the rulemaking and provide feedback:

• Session 2 | Engineering Bulletin 10, Chapters 3, 5, & 6: Pumping, Hydropneumatic Tanks, & Storage
  June 9, 2026 | 10 a.m. – 12 p.m. | View Session 2 Details & Register >
• Session 3 | Engineering Bulletin 10, Chapter 4: Treatment
  July 16, 2026 | 10 a.m. – 12 p.m. | View Session 3 Details & Register >
• Session 4 | Engineering Bulletin 10, Chapter 7, and Engineering Bulletin 8: Distribution & Disinfection
  Aug. 13, 2026 | 10 a.m. – 12 p.m. | View Session 4 Details & Register >
• Session 5 | Project Process & Exemption Criteria
  Sept. 1, 2026 | 10 a.m. – 12 p.m. | View Session 5 Details & Register >

Past Meetings

• 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 >

More 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 >