2026 NRWA Water Programs Internship (Paid) Nashua River Watershed Association The Nashua River Watershed Association (NRWA), founded in 1969, is an environmental nonprofit organization whose mission is to promote a healthy ecosystem with clean water and protected open spaces for both human and wildlife communities. Thirty-one towns in central Massachusetts and southern New Hampshire make up the Nashua River watershed. NRWA works through programs focused on Water Protection, Land Protection, and
Nashua River Watershed Assoc.