(a) Department authorized to inspect, test, etc.--The department is authorized to make inspections and conduct tests or sampling, including the examination and copying of books, papers, records and data, pertinent to any matter under investigation in order to determine compliance with this act and for this purpose, the duly authorized agents and employees of the department are authorized at all reasonable times to enter and examine any property, facility, operation or activity.

(b) Department authorized to establish recordkeeping requirements.--The department and its agents are authorized to require any supplier of water to establish and maintain such records and make such reports and furnish such information as the department may prescribe as being necessary to demonstrate that the supplier is complying with the requirements of this act and with the terms and conditions of its water supply permit.