Name: Drinking Water Supply Management Areas (DWSMA)
Display Field: dsw_name
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: New generation of Drinking Water Supply Management Areas for surface water intakes. This is the endorsed surface and subsurface area surrounding a public water supply intake that contains the scientifically calculated surface water protection area and is managed by the entity identified in a surface water protection plan. The boundaries of a DWSMA-SW are delineated by watershed and DNR-delineated catchment boundaries.
Name: Minneapolis, St. Paul, and St. Cloud Priority A DWSMA
Display Field: dsw_name
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The inner emergency management area is defined as the area in which the public water supply utility would have little or no time to respond to a direct discharge of contamination, other than to close the intake. Communication between emergency responders and the water utility will be essential for effective response action in this area. This is the area where a spill is most problematic because it is likely that a public water supply system would not have time to fill their reservoirs or adjust treatment technologies to address the spill. This area is based on an 8 hour TOT upstream of the intake based on high flow conditions. Additionally, contaminant threats, subwatersheds and areas of concern are considered and reflected in the delineated boundary of the Priority A area. The purpose of this area is similar to the Inner Emergency Response Area delineated for the SWA, but uses a detailed TOT study as part of the delineation process for the big three.
Name: Minneapolis, St. Paul, and St. Cloud Priority B DWSMA
Display Field: dsw_name
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: This area is designed to protect water users from chronic health effects related to low levels of chemical contamination or the periodic presence of contaminants at low levels in the source water. This area should protect users from contaminants such as pathogens that may be 1) usually found at treatable levels in the source water, but 2) occasionally present an acute health concern within the Priority B Designation. The eventual goal is that the supplier will work cooperatively with others to prepare and implement management strategies for inventoried potential sources of contamination in the Priority B Designation. The area is based on TOT and watershed areas that contribute point and nonpoint contaminants upstream from the intake. Similar criteria and rationale described for the SWA Outer Source Water Management Area were also used to delineate and establish boundaries for the Priority B area.