Notwithstanding the provisions of the general statutes, a municipality with a population between thirty-eight thousand and forty-three thousand persons, as enumerated in the 2000 federal decennial census, that, as of June 26, 2003, has a well that provides water service to a school administration building having less than seventy-five employees shall not be considered a water company for purposes of title 16 and this title. Nothing in this section shall relieve such municipality from testing the water in such well where testing is required by law.