The department enforces the Missouri Clean Water Law, its implementing regulations and Missouri State Operating Permits issued by the Water Protection Program. The Water Protection Program coordinates efforts with regional office staff to monitor compliance and provide compliance assistance to regulated facilities and sites across the state. 


Water flowing in a stream
Staff work to keep our waterways clean through compliance and enforcement efforts. 

The Compliance and Enforcement Section initiates enforcement actions to encourage or compel compliance where the responsible party does not voluntarily comply. Staff coordinate with regional office staff to provide guidance and advice for water pollution control compliance and enforcement issues, such as spills, fish kills, animal waste issues and environmental issues such as flood or drought. 

The section uses compliance monitoring data reported by permit holders, and enforcement data, and coordinates with regional office staff to identify significant non-compliance. The section prioritizes these facilities for Notices of Violation, follow up inspections, and enforcement actions to correct the violations.  

The section provides compliance assistance to the regulated public in an effort to reduce and prevent violations. Staff do this in various ways, including notifying permittees about missing Discharge Monitoring Reports, expired permits and other non-compliance issues. Notifications can occur by telephone call, email, automated phone message, and GovDelivery. Staff also work with regional office staff and other environmental professionals to identify permittees that need assistance to regain compliance. If compliance assistance efforts do not bring compliance and violations continue, the section will proceed with formal enforcement actions.

The section manages a large variety of cases referred by the regional offices, including but not limited to land disturbance sites, municipal and non-municipal wastewater treatment facilities and associated collection systems, industrial stormwater sites and confined animal feeding operations. When cases are referred to the section, staff will communicate with regulated parties and their attorneys to negotiate a mutually agreeable resolution through an Abatement Order on Consent. If a mutually agreeable resolution cannot be negotiated, the section may issue a Unilateral Order requiring compliance. If a violator fails to comply with an agreed or issued order, the section may request that the matter be referred to the Missouri Attorney General’s Office to compel compliance through litigation.

Active Enforcement

Active Enforcement Cases

Links to lists of the department's water pollution active enforcement cases are available below. The lists include operating permit number, facility name, and owner’s name and indicates if the case has been referred to the Attorney General’s Office. These lists are updated monthly and are organized by facility name and by county for a more accessible search. 

Formal Enforcement Actions

In cases where the violations are not resolved through conference, conciliation and persuasion, the department may use formal enforcement actions to compel compliance, including but not limited to Settlement Agreements, Abatement Orders, Abatement Orders on Consent, Consent Judgments and Court Orders. These agreements include the negotiated actions and a schedule for the responsible party to achieve compliance at the facility or site and pay any civil penalty or damage amounts assessed for the violations.


The department is also involved in the upkeep of the Water Protection Program’s NPDES database, the Missouri Clean Water Information System, to ensure compliance information is readily available to the public. In addition, section staff produce Monthly Enforcement Reports, Quarterly Non-Compliance Reports and Annual Enforcement Reports for public use. These reports are posted below.

Monthly Enforcement Reports

Links to the recent water pollution enforcement actions can be found below.  These reports provide an overall view of the department’s enforcement actions achieved during a month timeframe. Such actions include the number of enforcement cases received from the regional offices, number of cases resolved, number and description of agreements reached, and number of cases referred to the Attorney General’s Office with corresponding litigation actions.

2021 Monthly Enforcement Reports
2020 Monthly Enforcement Reports
2019 Monthly Enforcement Reports
2018 Monthly Enforcement Reports

Quarterly Non-Compliance Reports

The Water Pollution Control Branch maintains the Quarterly Non-Compliance Reports (QNCR) as a tool for prioritizing compliance assistance and enforcement actions. These reports focus on significant non-compliance identified at major facilities (i.e., facilities with a flow of greater than or equal to 1 million gallons per day and other large industrial sources). The QNCR lists significant non-compliance violations related to Discharge Monitoring Reports (e.g., overdue or incomplete reports and effluent exceedances), permit compliance schedules, and enforcement compliance schedules. Violations remain on each consecutive report until the permittee resolves the violation (i.e., submits a missing report, resolves effluent exceedances, or completes upgrades, etc.).

  • First Quarter Report - includes data for October, November, December
  • Second Quarter Report - includes data for January, February, March
  • Third Quarter Report - includes data for April, May, June
  • Fourth Quarter Report - includes data for July, August, September 
2021 Quarterly Non-Compliance Reports
2020 Quarterly Non-Compliance Reports
2019 Quarterly Non-Compliance Reports
2018 Quarterly Non-Compliance Reports
2017 Quarterly Non-Compliance Reports

Annual Enforcement Reports

The Water Pollution Control Branch's annual enforcement reports provide an overall view of water quality enforcement actions.