Rules and regulations books sitting on a desk in a library

The Clean Water Rulemaking group is a stakeholder group organized by the department to discuss state water quality and wastewater regulations. The group provides input and assistance to the department in developing and refining Missouri’s clean water regulations (10 CSR 20).

Meetings

Meetings are held as needed and are open to everyone. Attendance at these meetings may be in person, by conference call or through Webex. The department will attempt to correct technical difficulties as they arise, but the department cannot guarantee the quality of the Webex or conference call option. The meeting will not be subject to change or repeat due to any technical difficulties.

If there are issues you would like to discuss during the meeting, you will need to notify the department before the meeting. You can do this by emailing the staff coordinator noted below. Individuals requiring special services or accommodations in order to attend a meeting can make arrangements by contacting the staff coordinator at least 48 hours before the meeting. Hearing- and speech-impaired individuals may contact the staff coordinator through Relay Missouri at 800-735-2966. Translation or interpretation services will be provided upon request at no charge. Call 573-522-9395 for assistance.

Staff Coordinator: Susan Mills, Water Pollution Control Branch, susan.mills@dnr.mo.gov, 573-526-1386

Public Notices

There are no currently active Clean Water Rulemaking Public Notices/ Public Comments.

Upcoming Meetings


Meeting

Lewis and Clark State Office Building
Jefferson City, Missouri

The department is preparing the following the rule: 10 CSR 20-6.010 Construction and Operating Permits.

Attendance at this hearing may be in person, by conference call or through Webex, using the information below. If you choose the Webex or conference call option, please mute your phone or computers so background noise and hold music do not come through.

Meeting number (access code): 2630 901 0566
Meeting password: DNR
Call-in number (US/Canada): 650-479-3207*

*This is not a toll-free number. Any charges that may occur from this option are the responsibility of the participant.

Notice: This public meeting may be subject to audio and video recording. The department will attempt to correct technical difficulties as they arise, but the department cannot guarantee the quality of the Webex or conference call option. The meeting will not be subject to change or repeat due to any technical difficulties.

 More Info:

Meeting

Lewis and Clark State Office Building
Jefferson City, Missouri

The department is preparing the following proposed rules: 10 CSR 20-7.015, 10 CSR 20-7.031, and 10 CSR 20-8.140.

Attendance at this hearing may be in person, by conference call or through Webex, using the information below. If you choose the Webex or conference call option, please mute your phone or computers so background noise and hold music do not come through.

Meeting number (access code): 2869 655 9613 
Meeting password: CWC
Call-in number (US/Canada): 650-479-3207*

*This is not a toll-free number. Any charges that may occur from this option are the responsibility of the participant.

Notice: This public meeting may be subject to audio and video recording. The department will attempt to correct technical difficulties as they arise, but the department cannot guarantee the quality of the Webex or conference call option. The meeting will not be subject to change or repeat due to any technical difficulties.

 More Info:
All department events and meetings, including dates, times and locations, are available by accessing the department calendar.

Past Meetings


Meeting

Lewis and Clark State Office Building
Jefferson City, Missouri

This meeting focused on reviewing, revising or updating the Wastewater Minimum Design Standards in 10 CSR 20-8.140, Wastewater Treatment Plant Works, as part of the department's Clean Water Rulemaking. This meeting focused on the technical aspects of the rule, including a discussion on updates to the minimum setback distances from residences and property lines, along with chemical handling.  

 Additional Materials:

Meeting

Lewis and Clark State Office Building
Jefferson City, Missouri

This meeting focused on reviewing, revising or updating the Wastewater Minimum Design Standards in 10 CSR 20-8, as part of the department's Clean Water Rulemaking. This meeting focused on the technical aspects of 10 CSR 20-8.140, Wastewater Treatment Plant Works, including a discussion on updates to the minimum setback distances from wells and updates to chemical handling.

 Additional Materials:

Meeting

Lewis and Clark State Office Building
Jefferson City, Missouri

This meeting focused on reviewing, revising or updating the Wastewater Minimum Design Standards in 10 CSR 20-8, as part of the department's Clean Water Rulemaking. This meeting will focus on the technical aspects of 10 CSR 20-8.140, Wastewater Treatment Plant Works, including a discussion on updates to the minimum requirements on electrical controls, fencing and barriers around the treatment plant, ventilation, emergency storage and chemical handling. 

 Additional Materials:
All department events and meetings, including dates, times and locations, are available by accessing the department calendar.

Ongoing Discussions

For documents submitted as part of the rulemaking process, please visit the department's Regulatory Action Tracking System.

Land Application of Wastewater and Wastewater Treatment Residuals (10 CSR 20-2.010 and 10 CSR 20-6.015)

Due to a decision by the Missouri Fertilizer Control Board, companies and businesses previously authorized to land apply certain sludges, biosolids and other process wastes will no longer be exempt from department permitting requirements. The department is meeting with those that are interested, to revise these regulations to include nutrient management and land application practices for these facilities. Draft regulation documents are provided below. For more information, or to view materials presented at past meetings, please visit the department's Land Application of Wastewater and Wastewater Treatment Residuals webpage.

Public Participation (10 CSR 20-6.020)

The department is planning to make administrative amendments only to these regulations. These proposed amendments were discussed at the May 2025 Water Protection Forum. The draft rule language is provided below.

Water Quality Certification (10 CSR 20-6.060)

The department is planning to make administrative amendments to these regulations. These proposed amendments were discussed at the May 2025 Water Protection Forum. The draft rule language is provided below.

Storm Water Regulations (10 CSR 20-6.200)

The department is planning to make administrative amendments to these regulations. These proposed amendments were discussed at the May 2025 Water Protection Forum. The draft rule language is provided below.

Effluent Regulations (10 CSR 20-7.015)

The department is planning to amend these regulations, which establish requirements for various pollutants discharged into waters of the State. The department's initial draft rule language is provided below.

Water Quality Standards (10 CSR 20-7.031)

The department is meeting with those that are interested, to review, revise or update the water quality standards. Discussions for updates to this regulation will be spread out over several meetings. Draft rule language will be provided soon. For more information, or to view materials presented at past meetings, please visit the department's Water Quality Standards Workgroup webpage. 

Wastewater Treatment Facilities (10 CSR 20-8.140)

The department is meeting with those that are interested, to review, revise or update the minimum design standards for systems that are part of wastewater collection and treatment systems. Discussions for updates to this regulation will be spread out over several meetings. Discussion materials will be provided below as they become available.

*A Regulatory Impact Report (RIR) is being drafted, tentatively scheduled for public notice Fall 2025.

Construction and Operating Permits (10 CSR 20-6.010)

The department is planning on amending the term continuing authority to responsible authority and revises the implementation of the responsible authority regulations and requirements. This amendment also provides revisions throughout to add additional clarity and consistency within rule.

Contact Information