Zalco Laboratories was founded  in 1979 by John Zaletel,Ph.D and Jim Etherton. What started as a small, independent testing lab for the petroleum industry in Central California quickly grew into a full-service, state-of-the-art testing facility. Today, we operate out of a 5,500 square foot laboratory that provides the full spectrum of regulatory environmental testing services.

We are a state-certified, ELAP-accredited facility capable of producing quality, accurate analytical investigations for large volumes of complex samples. Our capabilities include ASTM and EPA-approved methods for petrochemical and environmental testing services.

At Zalco, we pride ourselves on providing quick turnaround times and the highest levels of customer service. We are responsive to our clients’ needs and work hard to exceed their expectations.