DNR to sample groundwater in Anoka County

Results of geographic atlas will be used for long-term planning


Water samples from wells in Anoka County will be collected and analyzed for water chemistry over the next two months. Samples will also be tested to learn how long the water has been underground.

Department of Natural Resources hydrogeologists plan to collect about 90 water samples for the Anoka County Geologic Atlas. The atlas is a cooperative effort involving staff from the Minnesota Geological Survey, DNR Ecological and Water Resources Division, Anoka County and the Anoka County Soil and Water Conservation District.

DNR staff will contact county residents for permission for well sampling, which involves collecting a water sample and measuring the depth to water in each well. The selection of wells for sampling will be based on geology, location, well depth and well construction. Owners of wells that are sampled will receive a report of the laboratory results for their well.

Preserving the long-term quality of the region’s surface and groundwater resources requires that policy makers have access to accurate information based on sound scientific principles. A county geologic atlas is a tool used by county planners, resource managers and other local government staff when making general planning, land use management and water resource protection decisions.

The Minnesota Geological Survey has already published part of the atlas illustrating details of each county’s geology. In 2015, the DNR will publish the groundwater portion of the atlas, including maps and descriptions of the hydrogeology, cross sections illustrating groundwater conditions and the pollution sensitivity of groundwater in the county.

The DNR county geologic atlas program is funded in part by the Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources and funding from the Clean Water Land and Legacy Amendment.

A full description of this DNR program and status reports for atlas products can be viewed at www.dnr.state.mn.us/waters/groundwater_section/mapping/index.html.