Northern Lake Service, Inc. (NLS) is a fully certified, state-of-the-art environmental laboratory. We analyze groundwater, wastewater, drinking water, soil, sludge, and tissue samples for environmental compliance and public health parameters. We also provide field collection services for groundwater and wastewater samples and conduct limnological studies. This web page is designed to help clients get to know us better and contains specific information about our history, personnel, credentials, certifications, analytical methods, testing, value-added services and client confidence. Northern Lake Service in an Equal Opportunity Employer.