A ban on Styrofoam food and drink containers will begin Friday in D.C.
Officials with the Department of Energy and Environment will launch undercover spot checks to ensure no businesses continue to use the foam containers.
Establishments not in compliance will be issued a warning and given 30 days to follow the new law. A business still using the containers after 30 days will be fined $100.
The D.C. Council and then-Mayor Vincent Gray passed the law in 2014 as part of a set of environmental initiatives that also includes requiring businesses to use compostable disposable dining products by 2017.
Gray said the ban will improve the health of the Anacostia River.