EPA hosts free decon conference
EPA's decon conference is on May 8-10, in North Carolina. Three weeks left for abstracts, and delegate places still available
If you are interested in free CBRN conferences in 2018 there are two to choose from. We mentioned DTRA's free CBRN survivability conference previously, but if your CBRN flavour is decon rather than survivability then you might want to go here
Three days of all things decon, and you still have a chance to submit your abstract until the 21st of Feb.
If you are looking for a US CBRN conference in the first half of 2018 you are spoiled for choice, and all free!