Dutton Glencoe Dresden Highgate Bothwell Ridgetown Strathroy Alvinston Rodney Thamesville Chatham Mount Brydges Wallaceburg Tilbury Blenheim Leamington Wheatley Port Stanley West Lorne MIDDLESEX LONDON ST. CLAIR LAKESHORE ENNISKILLEN WEST ELGIN DAWN-EUPHEMIA SOUTHWOLD LLE LEAMINGTON CENTRAL ELGIN SOUTHWEST MIDDLESEX DUTTON/DUNWICH ADELAIDE-METCALFE BROOKE- ALVINSTON STRATHROY- CARADOC ST. THOMAS PETROLIA OIL SPRINGS NEWBURY ELGIN LAMBTON CHATHAM-KENT Map 7-1a Impervious Surface Area within Wellhead Protection Areas and Intake Protection Zones Lake Erie Lake St. Clair MICHIGAN St. Clair River ² DELAWARE NATION CHIPPEWAS OF THE THAMES FIRST NATION MUNSEE-DELAWARE FIRST NATION ONEIDA NATION OF THE THAMES Lower Thames Valley Source Protection Area Assessment Report Map created by UTRCA, May 8, 2015. Base mapping produced under license with the Ontario Ministry of Natural Resources. © 2011. Source Protection Area Boundary provided by Ontario Ministry of the Environment, 2006. Impervious Surface Area, LTVCA, 2014. Impervious surface area calculated only for those areas where an associated threat can exist; for SGRAs vulnerability scores 6 or greater. Thames-Sydenham and Region 10 0 10 5 km Legend ImperviousSurfaceArea_UTM_AR2 Percent_Impervious 0 to 1.0 1.1 to 8.0 8.1 to 80 80.1 to 100 Source Protection Area Boundary Municipal Boundaries County Boundaries BKEJWANONG TERRITORY (WALPOLE ISLAND FIRST NATION) AAMJIWNAANG FIRST NATION Note: The Percent Impervious is displayed on a 1 km grid, but the calculation only takes into account the vulnerable area within the grid cell.