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Resources for Weights and Measures

NIST OWM is pleased to provide our customers and stakeholders with directories of state officials and metrology laboratories together with relevant weights and measures resources from additional sources. 

We welcome your suggestions and feedback regarding other resources of interest. Please email us at owm [at] (owm[at]nist[dot]gov).

Weights and Measures in the News

OWM provides an updated list of news articles, interviews, and blogs highlighting state weights and measures in the news or other legal metrology topics of interest.


State Weights and Measures Directors

OWM regularly updates the list of Directors for the 50 states, the District of Columbia, and the territories of Guam and Puerto Rico. We include the current Directors, Chief, or Administrators, along with a state website link, phone, and mailing address.


State Metrology Laboratories 

OWM regularly updates a listing of the state metrology laboratories for the 50 states, District of Columbia, and territories, the USDA Agricultural Marketing Service/Federal Grain Inspection Service. We include a website link to the laboratory office, along with the mailing and shipping addresses, a copy of the past and current Certificates of Metrological Traceability (if available) and the contact information.


Directory of State W&M Officials and Metrologists

OWM issues a directory of all officials for the U.S. states and its territories. This provides contact information for all current Directors, Chief, or Administrators along with a staff listing, state website link, phone, and mailing address.





The National Conference on Weights and Measures (NCWM) is a professional non-profit association of state and local weights and measures officials, federal agencies, manufacturers, retailers and consumers.



The National Type Evaluation Program (NTEP) program is administered through the National Conference on Weights and Measures(NCWM).



The International Organization of Legal Metrology (OIML) is a treaty organization that develops voluntary standards (called Recommendations) intended to harmonize national legislation among Member States in areas where regulated instruments and measurements are involved.


Created July 8, 2016, Updated June 5, 2024