Routine monitoring programs help identify water resource concerns, but additional investigation is often needed to understand the causes of a problem and determine the most effective solutions. When monitoring data indicate an issue in a lake, river, or stream, ACD may conduct a special study to diagnose the problem, evaluate potential impacts, and recommend management actions. Special studies can also help resolve questions when there is uncertainty about whether a problem exists or what factors may be contributing to observed conditions.
Over the years, ACD has conducted studies on a variety of topics, including lake level management, unusual water level fluctuations, watershed hydrology, pollutant sources, and water quality impairments.
Many special studies in Anoka County are conducted as part of the Total Maximum Daily Load (TMDL) program. TMDLs are required under the federal Clean Water Act and are administered in Minnesota by the Minnesota Pollution Control Agency (MPCA). The Clean Water Act requires states to identify waters that do not meet water quality standards, known as impaired waters or the "303(d) List."
A TMDL study determines the sources of pollutants affecting an impaired waterbody, estimates the amount of pollution reduction needed to meet water quality standards, and identifies strategies to restore and protect the resource. These studies provide the scientific foundation for watershed restoration plans and guide future management efforts.
Data from many special studies and related monitoring programs are available through state agency databases and online resources, including those maintained by the Minnesota Department of Natural Resources (MNDNR) and the Minnesota Pollution Control Agency (MPCA).
Examples:
Typo and Martin Lake TMDL Study
- Fact Sheet
- Project Status
ACD Contact: Jamie Schurbon 763-434-2030 x 210