Chapter 8 Stakeholder Workgroup


The Missouri Department of Natural Resources has given priority to amending the Chapter 8 Design Guides. Many of these rules have not been updated for the past couple decades. Chapter 8 rules concerning Concentrated Animal Feeding Operations will not be included in this revision process, but may be found here.

The proposed changes to 10 CSR 20-8.110 through 10 CSR 8.210 will be based on the 2004 and 2014 versions of the “Recommended Standards for Wastewater Facilities” (otherwise known as the 10 States Standards) developed by the Wastewater Committee of the Great Lakes-Upper Mississippi River Board of State and Provincial Public Health and Environmental Managers. The 10 States Standards are considered national standards and are used throughout the United States and Canada. Missouri is an original member of this committee and continues to participate today.

The Chapter 8 Stakeholder Workgroup is an informal and voluntary public participation activity conducted in addition to the formal public participation process required for formal rulemaking. The Missouri Clean Water Commission will conduct a public hearing and accept comments on the proposed rule amendments after publication in the Missouri Register. The workgroup’s primary purpose is to provide engaged stakeholders an opportunity to provide input and comment on proposed rulemaking changes. The discussions and comments from the workgroup sessions will be considered while the department drafts and finalizes the Chapter 8 rule amendments.

Under Gov. Greitens' leadership, all state agencies are working to reduce regulations and 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, implementing statutory mandates and maintaining state control of programs. Any further proposed changes to rules discussed on this page are being developed with these goals in mind. We welcome your comments to help ensure that our regulations provide required protections but do not add unnecessary costs.

If you wish to provide comments on any existing department regulation, please visit the department’s Red Tape Reduction website.


The department plans to rescind 10 CSR 20-8.020 and incorporate the small design guide into the larger design guide rules with exceptions as appropriate. As a result, there will be only one reference for any size wastewater treatment facility. The department hopes this amendment will reduce confusion and streamline the rulemaking process in the future.

The department is proposing amending 10 CSR 20-8.110 through 10 CSR 20-8.220 through the same rulemaking folder process. Each rule will have multiple scheduled stakeholder discussions. After all the rules have been through the stakeholder process, the department will proceed with one encompassing rulemaking report, regulatory impact report and fiscal note. The department believes presenting all of the domestic Chapter 8 rules as a whole will better represent costs and impacts rather than focusing on a single component in a wastewater system. Also, this proposal will reduce the rulemaking schedule by an estimated two years.



Upcoming Meetings

Feb. 28, 2018
9:00 A.M. - 4:00 P.M.
Lewis and Clark State Office Building
1101 Riverside Dr.
Jefferson City
10 CSR 20-8.180 Biological Treatment RTR draft
10 CSR 20-8.200 Wastewater Treatment Lagoons and Wastewater Irrigation Alternatives RTR draft
10 CSR 20-8.210 Supplemental Treatment RTR draft


Past Meetings

Feb. 21, 2018
10 CSR 20-8.160 Settling RTR draft
10 CSR 20-8.170 Solids Handling and Disposal RTR draft
10 CSR 20-8.190 Disinfection RTR draft

Feb. 20, 2018
10 CSR 20-8.300 Manure Storage Design Regulations RTR draft
10 CSR 20-8.500 Design Requirements for Agrichemical Facilities RTR draft

Feb. 6, 2018
10 CSR 20-8.110 Engineering-Reports, Plans, and Specifications RTR draft
10 CSR 20-8.140 Wastewater Treatment Facilities RTR draft
10 CSR 20-8.150 Preliminary Treatment RTR draft

Jan. 23, 2018
10 CSR 20-8.120 Gravity Sewers RTR draft
10 CSR 20-8.125 Alternative Sewer Systems RTR draft
10 CSR 20-8.130 Pumping Stations RTR draft
Draft Design Guide

2008-2017 Meeting Notes
2016 Update
MWEA 2017 Presentation-35 Years in the Making

More Information

10 States Standards
Department Proposed Rules
Wastewater Construction Permitting
Water Protection Program Rule Development
Water Protection Forum