The Grassy Narrows & Islington Band Mercury Disability Board


Mercury Contamination Facts

Agreements and Legislation
Mercury Programs
Methylmercury - A Dangerous Chemical
Methylmercury Outbreaks
Treatment for Mercury Poisoning
Mercury Poisoning Worldwide
Diagnostic Criteria
Benefit Entitlement
Mercury Status in Fish
The Report - A Valuable Study Tool

Methylmercury - A Dangerous Chemical

.Mercury is an element. An element is a substance that cannot be broken down chemically into a simpler form, for example, hydrogen, or oxygen. These elements can be changed by a scientist, who has special knowledge, to form water. They can also be changed by a totally natural process. Water is a compound. It is a substance formed when more than one element is changed chemically, as happens when hydrogen, an element, is combined with another element, oxygen, to form water, a compound.  In the case of methylmercury, mercury joins with carbon and hydrogen to form methylmercury.

This transformation, or change, happens by a process called methylation. Bacteria in river sediment cause mercury deposited in wastewater from chemical plants, such as the Dryden Mill, to change into this poisonous compound. Live creatures, such as fish and shellfish, eat it. Humans and animals in turn eat them. If the poisons are of a sufficiently high concentration, they can be harmful to both.

Animals and humans, who had eaten a lot of fish over a long period of time, were seriously affected. The Dryden Mill dumped a lot of chemical waste, or effluent, into the rivers. The poison that resulted was very harmful to the food in the food chain eaten by residents of the English - Wabigoon River systems.

Eligibility to Apply for Benefits

For a person to be eligible to apply for benefits (per legislation), that person must be a current member of Grassy Narrows First Nation or Wabaseemoong Independent Nations; a past member of one of the two bands; or a registered Indian who was customarily resident on one the two first nation communities prior to the first day of October 1985

Download the Mercury Contamination Facts Booklet in PDF Format (680k)

Did you know...

that since inception to March 31, 2017 the Mercury Disability Board has processed 1093 initial applications for benefits.



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