Monday, March 30, 2009

MassDEP Limits Mercury in Industial Wastewater Discharges

Massachusetts Department of Environmental Protection (MassDEP) restrictions on mercury discharges to municipal sewer systems go into effect on May 1, 2009. These rules, promulgated under the Massachusetts Mercury Management Act, limit the maximum concentration of mercury in sanitary sewer discharges from industrial users to less than 1 ug/L (1 ppb). By July 2007, all dischargers were to have determined possible sources of mercury in their discharges and have taken reasonable steps to eliminate them.

[What is 1 ug/L (parts per billion) mercury equivalent to?]

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