Water Protection Program Rule Development

The following rule developments are being considered. Some rules listed on this page have Regulatory Impact Reports, (RIR) associated with them. An RIR provides information on the rule development. Comments may be provided for RIRs during public comment periods using the department's Regulatory Action Tracking System, or RATS. All comments received will be posted with responses prior to filing as a proposed rulemaking. Once filed and published in the Missouri Register, there will be another opportunity to comment during the proposed rulemaking open comment period and public hearing prior to adoption.

State agencies are working to reduce regulations or other government processes that unnecessarily burden individuals and businesses while doing little to protect or improve public health, safety and our natural resources. The Missouri Department of Natural Resources is committed to limiting regulation to what is necessary to protect Missouri's environment, implement statutory mandates and maintain state control of programs. Any proposed changes to rules discussed on this page are being developed with these goals in mind. We welcome your comments to help ensure our regulations provide required protections but do not add unneeded costs.

For more information on the Red Tape Reduction initiative, please visit the department’s Red Tape Reduction website.

Public Drinking Water Branch



Water Pollution Control Branch

10 CSR 20-7.031 - Water Quality Standards

Section 303(c)(1) of the Clean Water Act and EPA's implementing regulations at 40 CFR 131.20, require that states, from time to time, but at least once every three years, hold public hearings to review applicable water quality standards, and, as appropriate, modify and adopt water quality standards. On Jan. 2, 2019, the Department made available for public comment the Intent to Initiate Triennial Review of Missouri Water Quality Standards. The public notice period ran through March 2, 2019.

Public Comments to the Intent to Initiate Triennial Review of Missouri Water Quality Standards
Responses to Comments
Triennial Review Survey Results Handout
Proposed Presumed Use Removals
Proposed Recreational Use Removal

Water Quality Standards Workgroup meetings were held in summer of 2019 to collect input on the Department's proposed revisions to the rule. For more detailed information on the topics discussed, visit the Water Quality Standards Workgroup page.