Restoring the Great Lakes Areas of Concern Data

This table shows the number of Beneficial Uses listed as “impaired” and as “requires further assessment” for the 17 Canadian Great Lakes Areas of Concern between their first assessment and 2012. During that period, 3 Areas of Concern were considered fully restored, and 2 were considered Areas in Recovery.

Progress on Canadian Great Lakes Areas of Concern

Lake	Area of concern	Initial assessment – Impaired	Initial assessment – Requires further assessment	Year	2003 – Impaired	2003 – Requires further assessment	2012 – Impaired	2012 – Requires further assessment
Superior	Thunder Bay	10	1	1991	9	0	5	5
Superior	Nipigon Bay	7	1	1991	5	0	3	1
Superior	Jackfish Bay	6	2	1991	6	1	3*	2*
Superior	Peninsula Harbour	5	1	1991	5	0	5	1
--	St. Marys River	9	1	1992	9	1	9	1
Huron	Spanish Harbour	5*	4*	1993	3*	0*	3*	0*
Huron	Severn Sound	6	2	1988	0**	0**	0**	0**
Huron	Collingwood Harbour	3	0	1989	2**	0**	2**	0**
--	St. Clair River	9	3	1991	9	3	8	3
--	Detroit River	8	0	1991	9	2	9	2
Erie	Wheatley Harbour	5	0	1998	5	1	0**	0**
--	Niagara River	8	2	1993	6	3	6	1
Ontario	Hamilton Harbour	11	1	1992	8	3	8	3
Ontario	Toronto and Region	8	1	1989	8	3	8	2
Ontario	Port Hope Harbour	1	0	2003	1	0	1	0
Ontario	Bay of Quinte	8	3	1990	10	1	9	1
--	St. Lawrence River	11	3	1992	7	3	3	0

* Area in recovery
** Restored

Note: For the complete data set from 1987 to 2012, please see the data file.

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