The mineral contents were high and the fish were good sources of calcium, zinc and iron. On the other hand, levels of contaminants in the fish were generally low. However, the mercury levels were in the range typically found in freshwater fish in North America and were not indicative of any contamination from a local pollution source. Exposure to contaminants from fish consumption was estimated by multiplying the fish consumption data by the contaminant concentration in the fish. The average daily intake of all the contaminants was below the guideline levels by at least an order of magnitude, with the exception of mercury.
Mercury intake at the current fish consumption rate is about one third that of the guideline level.
The 95th centile intake levels were also below the guideline levels. Therefore, there is no risk associated with the consumption of fish at the current rate. Overall, the fish in Kahnawake should be regarded as safe to eat. A recommended level of fish consumption was devised based on the guideline level for mercury. Except for sturgeon, all locally fish can be consumed at least once a week.