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 Opportunity: 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.
November 19, 2024: DATCP Announces Settlement with Roundy’s for Product Weight and Labeling Violations
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.
ATCP 94: On, March 1, 2024, the final rule for Wis. Admin. Code ch. ATCP 94, Petroleum and Other Liquid Fuel Products, went into effect. The final rule may now be found in the state’s Administrative Register on the Wisconsin Legislature’s
website.
Sign up to receive news notifications and industry updates from DATCP.
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.
LEARN MORE
|
 Petroleum and Storage Tanks
Storage tank systems for petroleum and
hazardous liquids are regulated by DATCP.
LEARN MORE
|
 Licensing, Permitting, and Registration
Learn about requirements for service companies,
weights and measures devices, and storage tanks.
LEARN MORE
|
 Service Companies and Technicians
Service companies and technicians in Wisconsin
must be certified or licensed by DATCP.
LEARN MORE
|
 Laboratory Services
Thousands of tests are conducted every year in
DATCP's metrology and fuel quality lab.
LEARN MORE
|  Training and Continuing Education
Tank installers and system inspectors must
receive continuing education to remain certified.
LEARN MORE
|