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Mercury is a toxic metal that has high bioconcentration and bioaccumulation rates when in the form of methylmercury. Water quality criteria treat all mercury as if it is in the form of methylmercury, the most common organic mercury compound in the environment.
Method 1631, Revision E is a new mercury analytical method approved by U.S. EPA in October 2002 that can measure the concentration of mercury at a level below Indiana's existing aquatic life, human health, and wildlife water quality criteria. Prior to the availability of this method, laboratory analysis could only measure mercury at a level well above these water quality criteria. With the use of Method 1631, compliance assessment indicates that the majority of wastewater discharging facilities in Indiana will not be able to consistently meet their NPDES permit limits for mercury.
For information on cleaning up mercury, see Mercury Spill Information and Cleanup Guidance [PDF].
The list below links you to other mercury education by sector: