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National Water Quality Laboratory

Sunday July 22, 2018

Laboratory Certifications

Current Certificates Issued to the National Water Quality Laboratory

The NWQL maintains NELAP certification through New York State for nonpotable waters using USGS methods.


Please note, NWQL's drinking water certification from the State of Colorado expired June 1, 2004.

Colorado certificates from 2002 and 2003 are available upon request

Note: All Certifications in pdf format.
For inquiries contact: Lisa Bressler (lbressle@usgs.gov)

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URL: http://nwql.usgs.gov/lab_cert.shtml
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Page Last Modified: Wednesday, 03-May-2017 06:48:24 MDT