20190617 13193900 1.0 TRUE Emergency Response Areas (ERA) Emergency response area (ERA) is the Minnesota Department of Health (MDH) approved surface and subsurface area surrounding a public water supply well that completely contains the scientifically calculated 1 year time-of-travel and is managed by the entity identified in a wellhead protection plan. https://gisdata.mn.gov/dataset/water-emergency-response-areas Minnesota Department of Health and private consultants.