Neilson Research Corporation is a full service analytical testing laboratory specializing in Drinking water, Stormwater, Wastewater, Hazardous wastes and Asbestos Analysis. We are committed to providing our clients with sound analytical data, unparalleled customer service and offering a full range of environmental capabilities.


We are accredited by Oregon Environmental Laboratory Accreditation Program (ORELAP) and have continuously maintained EPA or State accreditation since 1981. Under this program Neilson Research Corporation is certified for drinking water methods under the Safe Drinking Water Act (SDWA), non-potable water methods under the Clean Water Act (CWA), and solids and chemical waste under the Resource Conservation and Recovery Act (RCRA).

ORELAP is recognized by The NELAP Institute’s National Environmental Laboratory Accreditation Program. ORELAP accredits qualified laboratories for testing under the Clean Air Act (CAA), Clean Water Act (CWA), Resource Conservation and Recovery Act (RCRA), and the Safe Drinking Water Act (SDWA).

Quality Assurance

The data produced by Neilson Research Corporation is used to protect the general public and environment. Our corporate policy is that there will be Quality Assurance activities performed in each department of the laboratory to authenticate that all analytical data reported will be scientifically sound, legally defensible, of known and documented quality, and will accurately reflect the samples submitted for analysis.

Unparalleled Customer Service

We listen carefully to our customers to make sure we deliver what they need and have come to expect from us.  Our goal is to deliver top quality, totally documented environmental laboratory services on time.  We always take that “little extra” to help our customers understand their test results, and ultimately, to make sure the customer is completely satisfied.   Over the past 36 years we have earned the trust of our clients through hard work, honesty, integrity, fairness, and our commitment to analytical excellence.