Many states have regulations on weed control products, but they are frequently unable to enforce them. We have customers in every state.
No permit is required, however, a letter should be submitted to the DEP with description.
You can find your local office here: https://dep.wv.gov/WWE/DWWMcontacts/Pages/default.aspx
If you find out what permitting guidelines you have, please do us a favor and let us know at firstname.lastname@example.org