AZWARN Overview2

City of Tolleson — City Council (2026-05-12)

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AZWARN OVERVIEW
CHRISTINE NUÑEZ, AZWARN CHAIR
CITY OF PHOENIX, ENVIRONMENTAL PROGRAMS MANAGER

AZWARN - WATER/WASTEWATER AGENCY RESPONSE NETWORK 
The mission of the AZWARN network is to support and 
promote statewide emergency preparedness, disaster 
response and mutual aid assistance for water and 
wastewater utilities during natural and human caused 
emergencies.

A NETWORK OF UTILITIES HELPING UTILITIES
AZWARN organizes utilities within AZ through a 
mutual aid agreement
Provide one another assistance - personnel, 
expertise, and resources in emergencies
Natural disasters
Human-caused disasters or emergency situations
Requests and response are voluntary 
Each responding organization is reimbursed for 
labor, materials, etc. by the requesting utility.
AZWARN is not a corporation or a governmental 
unit it is member run and voluntary based.

UTILITIES ARE SPECIALIZED OPERATIONS
Systems and Instrumentation
Distribution and Collection System Dynamics
Water and Wastewater Treatment Expertise and 
Specialized Knowledge
Certified Personnel
Human Health Ramifications
Toxic and Explosive Chemical Handling & Control
Regulatory Consequences
Unique Laboratory Disciplines

AZWARN - WATER/WASTEWATER AGENCY RESPONSE NETWORK 
Open to all Water and Wastewater utilities in AZ (public and private)
Volunteer based
AWWA & EPA - National WARN Program
No cost (voluntary dues of $250 per year)
Training and Workshops – PDH’s
Member to Member Assistance via MAA
Emergency Management Assistance Compact
FEMA Schedule of Equipment Rates and actual costs

QUICK FACTS
Formed and activated in 2008
AZWARN - initiated through AZ Water (azwater.org) 
and the AZ Water Utility Council
3 Officers and 8-member board
By-Laws updated in 2022 Currently @ 45 Members
>76% population covered
Monthly & Bi-Weekly National WARN Meetings
2018 Mutual Aid Agreement – all water utility 
concept
Utility‑driven model - Utilities organize and manage.
WARN operations typically funded by MAA 
cost‑recovery provisions.

2025 SNAPSHOT
20 - 25 members attend monthly meetings
Training :
City of Peoria Emergency Manager Statewide Forum
ADEQ & AZWARN Security Readiness and Emergency 
Preparedness for Water & Wastewater Utilities
AZ Water Conference Emergency Preparedness 
Session for Operator Training Track Series 
Serve as Chair for the  Security/AZWARN Committee
Mutual Aids Requests:
Gila County – Post flooding – hauled water
Challenges:
Website
Water Hauling

WARN HISTORY
911 and Hurricane Katrina - drivers for WARN establishment
Katrina - No agreement - 40 days to mobilize.
Mississippi 3 days to mobilize  with an agreement and EMAC .
First formal WARN agreement was CalWARN (California), which 
became the model for other states.
Founding members: CALWARN, FLWARN, TXWARN, AZWARN
2007 - U.S. EPA began actively supporting nationwide WARN 
expansion
Initially EPA’s Water Security Division - funding, technical assistance, 
and coordination to help states form WARN’s and develop 
agreements.
EPA partnered with national water sector associations to promote 
WARN adoption and provide templates, training, and planning 
resources
Today AWWA works with EPA and some funding still available.

CURRENT WARN
Compared to its early years, the current WARN system:
Operates in every US state
Nationwide adopted & standardized  
New MAA modeled from the original IGA
Core model  – “ Utilities Helping Utilities”
Integrated through emergency management systems
MAA’s allow sharing of personnel, equipment, and specialized and technical expertise 
Inclusive of all utilities: Tribal, small to large systems, public and private.
More mature - procedures, exercises, and resource inventories
EPA and AWWA - national guidance and resources to keep WARNs aligned

BENEFITS OF WARN
Regulatory Benefits
Sets Terms and Conditions for Utility-to-Utility 
Assistance
Supports FEMA Reimbursement
Establishes emergency contacts and protocols
Practical Benefits
Rapid Assistance – Expeditious Correction 
Similar or Exact Knowledge Base
Certified Personnel
Regulatory Compliance Assitance
Minimizes Impacts

WHY SIGN A MUTUAL AID AGREEMENT?
Elected leadership and governing boards affirm a 
commitment to:
Operational resilience
Rapid response in emergency situations
Interagency cooperation
Regular collaboration with other utilities
Community protection and public health
Regulatory Compliance
The safety of employees

QUESTIONS?
Ed Buster, Treasurer, Christine Nuñez, 
Chair, & David Tavares, Vice Chair 
azwarn.org