The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) conducts routine inspections to ensure that consumers receive their money's worth in Wisconsin stores. It also regulates petroleum storage tanks and fuel quality. Find our weights and measures resources on this webpage.
What We Do
- Regularly monitor the accuracy of gas pumps, price scanners, scales, and package weights.
- Investigate complaints involving weights and measures devices.
- Review system design pre-installation plans for storage and dispensing system installations, modifications, and upgrades.
- Permit, register, and inspect flammable and combustible liquid storage tanks.
- Inspect and test liquid petroleum products.
- Credential companies and technicians who work with storage tanks and specific weights and measures devices.
- Maintain the State of Wisconsin weight standards in the Wisconsin Weights and Measures Metrology Laboratory.
Announcements
Training Opportunities:
- The Bureau of Weights and Measures is offering continuing education training for Aboveground Tank System Installers and Underground Tank System Installers. These trainings will be held virtually on February 19th and February 26th, 2025. Credentialed installers can earn 6 continuing education credits for attending one of the training sessions. Each training session is the same. Attendees must be present for the entire training to earn CECs. This training is open to individuals that do not hold the AST or UST Installer Certifications. Pre-registration is required for this training.
- Steel Tank Institute/Steel Fabricators Association (STI-SPFA) is offering their Cathodic Protection (CP) course June 10-12, 2025 in Madison, WI. STI/SPFA's CP course is focused on the real-world needs of individuals and companies that plan to conduct field testing of cathodic protection monitoring systems. Seating is limited and pre-registration is required. Register online at: STI/SPFA - Cathodic Protection Course - Madison WI.
Gasoline-Ethanol Blends Minimum Temperature: On October 4, 2024, DATCP issued a guidance document specifying enforcement discretion for fuel supply chain stakeholders at the minimum temperature for 50% evaporation for gasoline-ethanol blended fuels.
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Quick Links
Fact Sheets | DATCP Consumer Protection | DATCP Business Trade Practices | DNR | DSPS
 Weights and Measures
DATCP inspects and calibrates measuring devices
to ensure consumers get their money's worth.
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|
 Petroleum and Storage Tanks
Storage tank systems for petroleum and
hazardous liquids are regulated by DATCP.
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 Licensing, Permitting, and Registration
Learn about requirements for service companies,
weights and measures devices, and storage tanks.
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|
 Service Companies and Technicians
Service companies and technicians in Wisconsin
must be certified or licensed by DATCP.
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|
 Laboratory Services
Thousands of tests are conducted every year in
DATCP's metrology and fuel quality lab.
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|  Training and Continuing Education
Tank installers and system inspectors must
receive continuing education to remain certified.
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