(a) The provisions of any law, rule, or local ordinance which establish standards affording greater protection to groundwater resources or public health, safety, or welfare shall prevail, within the jurisdiction to which they apply, over the provisions of this Article and rules adopted pursuant to this Article.
(b) Rules relating to public health, wells, or groundwater adopted by the Commission for Public Health shall prevail over this Article, rules adopted pursuant to this Article, and rules adopted by a local board of health pursuant to subsection (c) of this section. This Article shall not be construed to repeal any law or rule in effect as of July 1, 1989.
(c) A local board of health may adopt by reference rules adopted by the Environmental Management Commission pursuant to this Article, and may adopt more stringent rules when necessary to protect the public health.