The state of New Hampshire believes a former municipal landfill could be responsible for elevated levels of manganese detected in groundwater near Breakfast Hill Road. Town officials contend the elevated manganese levels may be occurring naturally but believe it would be more trouble than it is worth to prove. Instead, the town is accepting the state's proposal to extend a management zone around the landfill to include a vacant lot on the opposite side of Route 1.  That would make groundwater at the vacant lot off limits for consumption, and it would be noted that an on-site well would not be permissible and that any development would have to tie into public water supplies. There are currently no plans in place to develop the site, but in the past it has been proposed as a site for a gas station or a bank.