Missouri Revised Statutes Title XL. Additional Executive Departments § 640.125. Test results to be reported--records to be retained--notices--information to be provided

1. The public water system shall report to the department of natural resources the results of all tests required by the state drinking water regulations and shall report to each customer in accordance with the federal Safe Drinking Water Act, as amended, and regulations promulgated thereunder.

2. Any owner or operator of a public water system subject to the provisions of section 192.320 and sections 640.100 to 640.140 shall retain in its premises, or at a convenient location near its premises, for a period of time specified by the department of natural resources the following records: records of operation; records of bacteriological analyses; records of chemical and physical analyses made pursuant to section 192.320 and sections 640.100 to 640.140; records of action taken by the system to correct violations of state drinking water rules and regulations; copies of any written reports, summaries or communications relating to sanitary surveys of the system conducted by the system itself, by a private consultant, or by any local, state or federal agency; and records concerning a variance or exemption granted to the system. If a public water system fails to comply with the state drinking water rules and regulations, monitoring requirements, or has been granted a variance or exemption, or fails to comply with the schedule or conditions prescribed pursuant to a variance or exemption, the department of natural resources shall require the supplier of water to notify its users and the public of the extent and nature of the noncompliance. Notification shall be in form and manner prescribed or otherwise approved by the department of natural resources.

3. When an investigation of any water supply, plant or methods used is undertaken by the department of natural resources, the person in charge of the water supply shall furnish on demand to the department such information as the rules and regulations promulgated require to determine the quality of the water being dispensed.