Table 10 - Quantity of Mercury Released to Each of the Great Lakes by Pathway / Source (kg/yr)

Pathway / Source

Superior

Michigan

Huron

Erie

Ontario

Total

Atmospheric

635 (1)

965-1,600 (3)

500-5000 (4)

-

2,430 (5)

6,800 (6)

Tributary / Riverine 1

-

186 (3)

-

-

-

-

Releases to air & water

819 (2)

-

-

-

2,580 (5)

-

Releases to water

-

-

-

-

150 (5)

-

Releases to landfills &
soils 2

354 (2)

-

-

-

-

-

Sediment

-

0.05 kmol/yr

-

-

-

-

Groundwater

-

-

-

-

-

-

Sources: 

(1)

U.S. EPA, Deposition of Air Pollutants to the Great Waters, Second Report to Congress, June 1997, p. 100.

(2)

Lake Superior Binational Program, Lake Superior Lakewide Management Plan 2000, April 2000.

(3)

U.S. EPA, Lake Michigan Lakewide Management Plan 2000, April 2000, p. 5-87 - 5-88.

(4)

Lake Huron Initiative Action Plan, March 2000.

(5)

Environment Canada, Lake Ontario - Best Current Estimated Loading Contribution from Top Sources of COA Substances (Dioxins / Furans and Mercury) as of January 2000. January 24, 2000. Electronic file received from Anita Wong, EC, February 23, 2001.

(6)

U.S. EPA, Deposition of Air Pollutants to the Great Waters, Second Report to Congress, June 1997, p. 99.

1

The top three tributary sources of mercury to Lake Michigan are the Fox River (76 kg/yr), Grand River (31.9 kg/yr), and St. Joseph River (19.4 kg/yr).

2

Releases to landfills and soils represent potential releases (as opposed to actual releases).