The Water Quality Monitoring Section assesses the biological health of Missouri’s rivers and streams, and monitors water and sediment quality throughout the state.  The section includes the aquatic biological assessment and water monitoring units. The section works in support of the Water Protection Program to ensure that Missourians will always have clean water for drinking, recreation, tourism and continued economic growth. Staff travel to all areas of the state conducting a variety of investigations such as:

  • Wastewater discharge monitoring
  • Groundwater monitoring
  • Electrofishing
  • Stream surveys

The section often assists with special projects such as enforcement actions, environmental risk assessments or damage assessments resulting from chemical spills. Staff collects and evaluates a wide variety of water, sediment and macroinvertebrate samples. The results of these studies are used to make certain that the rivers, streams and lakes of Missouri remain a treasure for all to enjoy.

Aquatic Biological Monitoring Unit

  • Bioassessment Reports
  • Biological Criteria Database
  • Macroinvertebrate Samples Database
  • Standard Operating Procedures and Project Procedures
  • Sample Maps

Water Quality Monitoring Unit

  • Projects
  • Analyses Performed

State Park Beach Sampling

The Missouri Department of Natural Resources samples water quality at all designated swimming beaches in the state park system on a weekly basis during the recreational season. In accordance with state law, the Missouri Department of Natural Resources will post signs notifying visitors that swimming is not recommended if the geometric mean of the weekly water quality sample results exceeds the equivalent of 190 E. coli colonies per 100 milliliters of water (190 mpn/100 ml).

Sampling results and map

Additional Information