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Groundwater <br />In Anoka County, most residents, <br />agriculture, and businesses rely on <br />groundwater from either municipal or <br />private wells for drinking water, <br />irrigation and other uses. Groundwater <br />supplies in Anoka County are <br />particularly vulnerable to contamination <br />due to the permeable sandy soils. <br />Figure 6 prepared by the MN Geologic <br />Survey (MGS) shows in red those areas <br />of Anoka County that are highly susceptible to <br />contamination. In some municipalities, wells <br />have already become contaminated and may no <br />longer be used for drinking water without expensive <br />treatment. Municipalities <br />can help protect drinking <br />water by using landuse <br />controls. <br />Figure 6: Groundwater <br />Contamination Susceptibility <br />Protection of municipal drinking <br />water supplies through landuse <br />controls is enhanced by the <br />identification and management of <br />drinking water supply management <br />areas (DWSMA) in two ways. First, <br />identification of DWSMAs can <br />enable resource managers to more <br />quickly narrow in on a pollution <br />source when contamination occurs. <br />Second, DWSMA identification can <br />enhance planning and zoning <br />efforts to minimize the likelihood of <br />contamination by prohibiting high <br />risk activities in sensitive areas. <br />Several municipalities are working <br />together under the umbrella of the <br />County Groundwater Protection <br />Assessment to manage DWSMAs. <br />DWSMA Boundaries <br />— Ve!y H!n VVlne lab!IRy <br />▪ High Vulnerability <br />o Mude,aie V,Ine1 Addy <br />nor <br />...Click ▪ l vithinshade <br />d <br />ed <br />area for moreint° on," <br />Oi <br />1 lr,re rpi u <br />iST <br />111.171, <br />.(l rrurvrtirl.+. <br />Figure 7: Drinking Water Supply Management Areas <br />page 16 Anoka Conservation District Comprehensive Plan October 2014 <br />