Weights & Measures Services Division

Contact Us

Mailing Address
1802 West Jackson Street, #78
Phoenix, Arizona 85007

Physical Address
1110 West Washington Street, Suite 450
Phoenix, Arizona 85007
(602) 542-4373, option 4
[email protected]

Weights and Measures Licensing (Other than Registered Service Representative and Public Weighmaster Testing)
(602) 342-3282
[email protected]

Central Licensing Division (For Registered Service Representative and Public Weighmaster Testing)
1010 West Washington Street
Phoenix, AZ 85007
[email protected]
Click Here for licensing and testing information for Registered Service Agencies and Representatives
Click Here for licensing and testing information for Public Weighmasters, Deputy Public Weighmasters, and Limited Weighmasters

State Metrology Laboratory
4425 W. Olive Avenue, Suite #134
Glendale, AZ 85302-3843
[email protected]

Who We Are

Mike Brooks
Assistant Director
(602) 920-4202
[email protected]

Vince Wolpert
Compliance Manager (Motor Fuel Quality, Cleaner Burning Gasoline, Vapor Recovery, Marijuana-related commercial devices, packaging, labeling, and method of sale)
(602) 920-4236
[email protected]

Chad Pilie
Compliance Manager (Commercial Devices, Net Contents of Packaged Goods and Package Labeling (other than Marijuana), Retail Pricing, Public Weighmasters, and Registered Service Agencies/Representatives)
(602) 377-1433
[email protected]

Damien DeSantiago
Compliance Officer (Phoenix-Metro, Tucson, and Yuma duty posts)
(602) 320-4401
[email protected]

Cory Gandara
Compliance Officer (Phoenix-Metro, Northern Arizona)
(480) 229-5067
[email protected]

Brian Sellers
State Metrologist
(602) 771-4938
[email protected]

Mauro Nieves
Assistant State Metrologist
(602) 771-4928
[email protected]

Michelle Wilson
Regulatory Compliance Administrator
(602) 397-0800
[email protected]

Michele Mellott
Gasoline Vapor Recovery Inspections, Scheduling, and Compliance Metrics
(602) 469-3363
[email protected]

Juliana Mahaffey
Licensing Specialist
(602) 342-3282
[email protected] 

Roger Fisk
Executive Assistant, Budget, and Procurement
(602) 499-6132
[email protected] 

What We Do

The Division’s primary mission is to promote equity and fairness in Arizona commerce involving weighing or measuring for commercial purposes by regulating and supporting businesses in a manner that protects both the buyer's and sellers' interests.  The Division carries out its mission by maintaining the State standards of weight and measure based on national standards maintained by the Federal government, licensing weighing and measuring devices used in Arizona, conducting a wide variety of inspection programs to protect the marketplace, and auditing measuring devices and enforcing the statutes, rules, and regulations governing their use.

Mission Statement

To protect the integrity of Arizona’s marketplace by ensuring that equity and accuracy are preserved in commerce through fair and evident regulation and the effective communication of weight and measurement standards.

Objective and Purpose

The Division’s overall objective is to protect businesses and consumers via uniform inspection and test procedures, proper licensing of measuring devices, knowledgeable and well-trained state investigators, and precise operation of a metrology lab that provides accurate measurements and calibrations for industry to Federal standards. The Division provides a coordinated system to follow up with inspection and procedural guidelines adopted by the National Conference on Weights and Measures (“NCWM”). 

The Division also offers guidance, assistance, and educational programs to encourage the public and private sectors to be efficient and compliant. As part of this effort, the Division regularly inspects regulated facilities and responds to citizen complaints. The Division also pursues informal and formal enforcement actions against regulated facilities to ensure compliance with weights and measures laws.

The Division plays a critical role in Arizona's marketplace by protecting consumers and retailers from unfair business practices. 

Division Responsibilities

  • Preserve and defend the measurement standards upon which all commerce is built to deliver fair competition in the Arizona marketplace.
  • Ensure that commercial devices (scales, vapor recovery, liquid petroleum gas, etc.) used to sell commodities by weight, measure, or count are licensed and accurate.
  • Conduct regular inspections of commercial devices, retail packaging and labeling, method of sale, and investigations of potential fraud related to prevent unfair dealing by weight, measure, or count.
  • Maintain the state's primary standards (those measurements upon which all other measurement is based).
  • Ensure proper labeling of products sold by weight, measure, or count (a gallon of gas is a gallon; your breakfast cereal weighs 20 oz. as stated on the package, etc.).
  • Ensure that prices are posted and items ring up at the posted price by conducting regular inspections to ensure compliance by retail businesses. 
  • License weighmasters who are responsible for weight certification.
  • Regulate Arizona Cleaner Burning Gasoline and Vapor recovery environmental programs.
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