Both the USEPA and WDNR have targeted mercury as a toxic pollutant of concern for the next several years. The WDNR has instituted a "mercury reduction strategy" which focuses on pollution prevention and source identification. Limits for mercury will remain in effluent discharge permits, but emphasis will be on the analysis of influents, up-the-pipe sources and WWTP sludges.
Northern Lake Service, Inc. (NLS) was the first laboratory approved by the WDNR to provide low-level analyses in water and wastewater
NLS uses emerging technology, a modified version of EPA Methods 245.7 and 1631, with a high recovery/low interface digestion technique for samples requiring a detection limit in the range of 10 ng/L
Our state-of-the-art method uses atomic fluorescence spectrometry and strict adherence to EPA method 1631 rev E. to provide a detection limit of 0.21 ng/L.
This method reduces atmospheric contribution of mercury vapor during calibration, making it safer and more environmentally friendly than other methods
NLS provides specially-cleaned containers and specific sampling instructions for collection for samples for low-level mercury.
NLS will collect your wastewater samples or train your staff to collect samples in accordance with EPA method 1669.
NLS has also developed and refined a method to provide very reliable determination of mercury levels in fish tissue.
For quotations or more information about sampling procedures and low-level analyses for mercury, call our Client Services Department, or E-mail at
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Client services can be reached by calling 715-478-2777, or send an email to the following contacts:
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