Moniteau County Neighbors Alliance

Missouri Department of Natural Resources

MDNR is the state agency responsible for protecting the quality of our air, land, and Waters of the State (streams, rivers, lakes, and groundwater). MDNR aspires to help Missouri citizens thrive by balancing a healthy environment with a healthy economy, which is very difficult with competing interests for the state’s natural resources.

Safe Drinking Water Act

The EPA is charged with implementing the Federal Safe Drinking Water Act through state agencies such as MDNR.  Drinking Water: MDNR conducts the following programs:  

  • Funds water system improvements.
  • Monitors some waters of the state for contaminants, 
  • Issues permits for public water systems and well drillers, 
  • Certifies drinking water treatment and distribution operators, 
  • Supports and promotes water system security and improved technical, managerial and financial capacity. 

Clean Water Act   

MDNR implements the federal Clean Water Act (CWA) under the guidance of the U.S. Environmental Protection Agency (EPA).  The CWA mission is "to restore and maintain the chemical, physical, and biological integrity of the Nation's waters." The MDNR is required to report (305b) the status of Missouri's waters of the state to the EPA every other year with a listing of waters determined to be impaired (303d)

MDNR Responsibilities

Some of the key activities the department carries out to protect and improve water quality include:

  • Writing rules and regulations for laws that passed by the Missouri State Legislature. 
  • Developing water quality standards, 
  • Issuing permits, and conducting inspections and enforcement actions, 
  • Monitoring water quality and quantity, 
  • Developing watershed management plans (WMP) to improve water quality, 
  • Managing funds provided by the federal government to the states such as the 319 grants to help prevent nonpoint (link to definition) source pollution. 

Accessing MDNR 

MDNR Rules and Regulations

Code of State Regulations 

10 CSR 20-7.031 Water Quality Standards 

PURPOSE: This rule identifies uses of waters of the state, criteria to protect those uses, and defines the antidegradation policy. It is developed in response to the Missouri Clean Water Law and the federal Clean Water Act, Section 303(c)(1) and (2), which requires that state water quality standards be reviewed at least once every three (3) years. These revisions are pursuant to the national goal of protection of fish, shellfish, and wildlife and recreation in and on the water as outlined in Section 101(a)(2) of the Act.

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