APM Reports and Great Lakes Today sent records requests to six large cities that sit directly on the Great Lakes, asking for water and sewer rates going back to 2007. APM Reports was able to gather rates for all but one city — Milwaukee — from at least 2010 to 2018, though some cities provided data back to 2007. Phoenix is included as a point of comparison. This analysis compares the cost for a family of four using 50 gallons per person per day. APM Reports chose this number based on the recommendations of academics that study water cost.