After August 28, 2004, any county within a watershed improvement district may require that all septic systems be maintained or pumped every five years by a licensed provider. In the event a county requires that all septic systems be so maintained or pumped the owner of any septic system shall submit proof of maintenance or pumping to the county department of health or the state department of health and senior services if appropriate which shall determine what shall constitute proof of compliance with the requirement. In addition, the county department of health or the state department of health and senior services if appropriate may charge septic tank owners a reasonable fee for monitoring compliance with the requirement.