How long will there be a restriction on swimming if herbicides are used?

Treatment area abutters should expect restrictions for swimming and fishing of 24 hours, although longer or shorter times are possible (see #2).  An abutter is anyone with shoreline property within 200’ of the treated area.  Outside of the treatment areas there will be no restrictions.  

According to the NH Department of Agriculture, restrictions are determined by the NH Department of Agriculture permit based on the herbicide label recommendation as well as local conditions and may differ for each treatment area.