USING GIS TOOLS TO IMPLEMENT AN ILLICIT DISCHARGE ELIMINATION PROGRAM IN LIVONIA, MICHIGAN

The City of Livonia, Michigan is using Geographic Information Systems (GIS) technology to enhance the implementation of its illicit discharge elimination program. The illicit discharge elimination program currently underway within the City of Livonia is required by the Michigan Department of Environmental Quality (MDEQ) Voluntary General Stormwater Permit (MIG610000), which was issued in 1997. This permit offers an innovative approach to the National Pollutant Discharge Elimination System (NPDES) permit program by focusing on the concept of watershed management. In August 1999, the City of Livonia received coverage under the MDEQ Voluntary General Stormwater Permit in lieu of requirements of the Environmental Protection Agencies (EPA) Phase I stormwater program.Within the City of Livonia, GIS has been used in direct support of General Stormwater Permit activities that focus on identifying illicit connections, points of infiltration and likely sources of future contamination to the storm sewer system. Activities currently underway include the mapping of the stormwater conveyance system, the location and mapping of storm sewer outfalls, and the location of on-site sewage disposal systems (OSDS). As a result of the GIS integration, record keeping is improved, problem areas are identified earlier, and joint efforts with surrounding communities and other agencies with storm drainage jurisdictions in Livonia are simplified. These GIS tools are also part of an overall municipal GIS program for improving the delivery of public works services to businesses and residents.