"Domicile" means that place where an individual has his or her true, fixed, and permanent home and principal establishment, and to which, whenever he or she is absent, he or she has the intention of returning. An individual might have more than one residence, but has only one domicile.
N.H. Admin. Code § Env-Wq 1002.18
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08