City of Portsmouth, Health Department, 1 Junkins Avenue, Portsmouth, NH 03801. Tel: (603) 610-7273 Health Department Home   Food Permits   Coffee Service   Food Recalls   City Home   Norovirus/Norwalk-Like Virus Think you have the "stomach flu?" It could be Norovirus/Norwalk-Like Virus - for more information on Norovirus, click here: For Norovirus information specific to Food-service workers, click here: return