Total Suspended Solids Levels on Big Sioux River Watershed in Sioux Falls

Total Suspended Solids Levels on Big Sioux River Watershed in Sioux Falls

The Big Sioux River has a designated use for Warmwater Semipermanent Fish Life. The state of SD has established the following Total Suspended Solids criteria to protect this water body for this designated use.

  • ≤158 mg/L Daily Max (Acute Criteria)
  • ≤90 mg/L 30 Day Average (Chronic Criteria)

High levels of Total Suspended Solids (TSS) can clog fish gills which can interfere with the fish’s ability to breathe. Higher levels of TSS can cause the water with the water body to cloudy, making it difficult for aquatic life to find food. The cloudy mucky water also reduces light penetration. This reduction in light decreases the ability of aquatic plants to produce food and oxygen. As the solids settle during lower flows, the silt may also smother bottom-dwelling organisms, cover breeding areas, and smother eggs. TSS can also influence temperature and dissolved oxygen.

Click on the  symbol of the corresponding monitoring location to view most recent month’s data for Total Suspended Solids.

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