Description: Lake Erie is divided into seven assessment units in Ohio. Western Basin Shoreline - lake shore to 3 meters in depth extending from the Ohio-Michigan border east to Marblehead. Western Basin Open Water - lake area with a depth greater than 3 meters extending from the Ohio-Michigan border east to Marblehead.
Lake Erie Islands - lake area extending from Ohio island shores to a depth of 3 meters.
Sandusky Basin Shoreline - lake shore to a depth of 3 meters extending from Marblehead east to the Black River.
Sandusky Basin Open Water - lake area greater than 3 meters in depth extending from Marblehead east to Lorain Ridge.
Central Basin Shoreline - lake shore to 3 meters in depth extending from the Black River east to Ohio-Pennsylvania border.
Central Basin Open Water – lake area greater than 3 meters in depth extending from Lorain Ridge to the Ohio-Pennsylvania border.
Service Item Id: 5718c321f684497d99fa8a812040ba7b
Copyright Text: Ohio EPA Division of Surface Water
Description: Large River Assessment Units (LRAUs) – 38 segments in the 23 rivers that drain more than 500 square miles; the length of each river included is from the mouth of each river upstream to the point where the drainage area reaches approximately 500 square miles. Data from individual sampling locations in an assessment unit are accumulated and analyzed.
Service Item Id: 5718c321f684497d99fa8a812040ba7b
Copyright Text: Ohio EPA Division of Surface Waters
Description: Watershed Assessment Units are comprised of 1,538 watersheds that align with the 12-digit hydrologic unit code (HUC) system. The first two digits of Ohio numbers are either 04 (draining to Lake Erie) or 05 (draining to the Ohio River). Data from individual sampling locations in an assessment unit are accumulated and analyzed.
Service Item Id: 5718c321f684497d99fa8a812040ba7b
Copyright Text: Ohio EPA Division of Surface Waters
Description: Watershed Assessment Units are comprised of 1,538 watersheds that align with the 12-digit hydrologic unit code (HUC) system. The first two digits of Ohio numbers are either 04 (draining to Lake Erie) or 05 (draining to the Ohio River). Data from individual sampling locations in an assessment unit are accumulated and analyzed.
Service Item Id: 5718c321f684497d99fa8a812040ba7b
Copyright Text: Ohio EPA Division of Surface Waters