The department works in many ways to protect Missouri’s water resources. We issue permits, inspect sources of water pollution and analyze water level data. The department provides financial and compliance assistance and, when necessary, enforcement action to address violations of water quality regulations. We work with stakeholders to develop a state water resources plan. We invite you to help us make a difference in protecting Missouri’s water resources. 

Citizens Guide to Water-Related Rules and Regulations
Understanding rules and regulations
Citizens Guide to Water Permits
Find help understanding permits and the processes
Water Financial Assistance Opportunities
Funding for projects, training, water conservation and water planning
Water Planning
Water resources and water quality planning
Water Reports
Drinking water, wastewater, water quality and funding reports
Clean Water Compliance and Enforcement
Active enforcement cases and reports for clean water violations
Nonpoint Source Pollution Section 319
Funding and resources to protect water quality
Laboratory Sampling Results Search System Selection Criteria (LIMS)
Information about the Laboratory Sampling Results Search System Selection Criteria
Environmental Geology Assistance
Geology and hydrology assistance including geohydrologic site evaluations
Missouri Water Tracing Laboratory
Groundwater tracing and registration
Public Notices
Provide input on draft permits, plans or rules on public notice
Success Stories
What we're doing with businesses and communities to improve our water
Find a meeting, hearing or event near you
Document Search
Search all department documents in one location for easy access
Laws, Rules and Regulations
State and federal rules governing water; rules in development

Contact Information