Incorporated in 1988, Environmental Service Laboratories, Inc. (ESL) is an environmental testing laboratory that provides its clientele with a comprehensive range of analytical testing, consulting, and field sampling services. ESL's customers include natural gas drilling companies, industrial facilities, municipalities, engineering firms, local/state/federal government, and the general public. ESL is accredited to test drinking water, wastewater, soil, solid materials, natural gas, frozen dairy products, and meat.