High Quality Content by WIKIPEDIA articles! The National Ground Water Association (NGWA), headquartered in Westerville, Ohio, is a membership-based nonprofit organization. Its mission statement reads: Dedicated to advancing the expertise of all ground water professionals and to furthering ground water awareness and protection through education and outreach. Its vision statement reads: To be the leading community of ground water professionals that promotes the responsible development, use, and management of ground water resources. Founded in 1948, NGWA currently has more than 13,000 U.S. and international members in its four membership divisions: water well contractors, scientists and engineers, manufacturers, and suppliers.