Environmental Testing History

Truesdail Laboratories, Inc., was founded in 1931 by Dr. Roger W. Truesdail as an independent testing and research organization. Originally, Truesdail Laboratories was a one-man operation offering analysis and testing in the field of nutrition and food chemistry in Pasadena, CA. There are now more than 50 employees engaged in a broad scope of testing. The Laboratories serve both government and industry in multiple scientific and technical disciplines, which include drinking, storm, and wastewater analysis, hazardous waste evaluation, general chemistry, microbiology, blood and urine analysis of racing animals and the certification of plumbing products.

ALS-Truesdail has performed drinking water and wastewater analysis in environmental samples since the 1930’s. Many things have changed over these past eight decades, but our integrity, rigor and attention to detail have not. We combine this long history of service with the most up-to-date and cost effective methods in this industry.

Our Laboratory was one of the initial 12 labs certified when California began certifying labs in the 1950’s. Truesdail Laboratories is certified by the State Water Resources Control Board (#1237) as an environmental laboratory, with approvals for drinking water, wastewater, hazardous waste, toxics, and microbiological analyses. ALS-Truesdail is also accredited by Perry Johnson Laboratory Accreditation, Inc. to ISO/IEC 17025 for laboratories and by the American National Standards Institute (ANSI) as a product certification organization ISO/IEC 17065. Additionally, the Drug Testing Laboratory is accredited to ILAC G-7, Racing Medication and Testing Consortium (RMTC), and the Association of Official Racing Chemists (AORC).

In 1983, after 52 years in Los Angeles, CA the laboratory relocated to the city of Tustin, CA. In 2015, after 32 years, Truesdail relocated to a new state-of-the-art laboratory in Irvine, California. The consolidation efforts relocated several laboratories under one roof, this allows Truesdail to have redundancy for both our personnel and many of our instruments allowing us to maintain industry best turnaround times.