Mercury lake area

Clear Lake. On two separate days, mercury vapor anomalies were detected in the Clear Lake area. The maximum peak, 200 ng/meter, was measured at the site of the Sulfur Bank Mine (now closed). Levels of 150 ng/meter were detected across the lake approximately 10 miles to the west near a golf course-residential area. This mercury may have been blown downwind from the old mine or been emitted by a local unknown source. 

Landis MS, Vette AF, Keeler GJ. 2002. Atmospheric mercury in the Lake Michigan Basin influence of the Chicago/Gary urban area. Environ Sci Technol 36(13) 3000-3009. 

Include multiple water bodies (clusters of sites) within each monitored geographic area. Within a geographic area, the chosen biological indicators should be sampled in several waterbodies of a given type (i.e., clusters of lakes or streams), because data from several sites will probably be needed to identify the overall trend within the area (Section 4.4). The direction of temporal trends can differ among individual water bodies because of spatio-temporal variation in other factors that influence mercury... 

While an exact number of site clusters has not been proposed, the authors consider from approximately 3 to 10 clusters of sites to be appropriate. These clusters should represent different ecoregions with different ecological characteristics as well as different loadings (both in amount and source) of mercury deposition. Care should be taken to monitor different types of water bodies and watersheds (e.g., seepage lakes, drainage lakes, old reservoirs, rivers, and estuaries). Areas that should be considered as potential cluster site locations include lakes in northern New England/the Adirondacks, lakes in the upper Midwest, rivers and streams in the southeastern coastal plain, lakes in south-central and southeastern Canada, western... 

Rask, M. and T.R. Metsala. 1991. Mercury concentrations in northern pike, Esox lucius L., in small lakes of Evo area, southern Finland. Water Air Soil Pollut. 56 369-378. 

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