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About what makes CT Laboratories different...

Experience cannot be overlooked. CT Laboratories LLC has been in business since 1987.  We are located in the heart of the Baraboo Bluffs in Baraboo, WI.  The lab was started back in the eighties as an off-shoot of the engineering firm Mid-States Associates.  Today, we are locally owned and continue to grow.  We are always increasing our capabilities and the locations we serve.

CT Laboratories' staff is comprised of dedicated, long-term employees. Key personnel, including our Laboratory Director, Project Managers, Group Leaders and Senior Analysts have an average tenure of over 12 years with the company. We also understand that communication is the key to a successful project. Our clients are assigned a specific project manager to take care of their needs from initial project scoping and assistance with QAPP generation, to fulfilling bottle requests and verifying sample receipt through addressing technical issues and final report generation.

Quality is not a given or an afterthought at CT Laboratories. Our quality assurance program is designed to ensure legally defensible data. From numerous performance evaluation studies, NELAP and other individual State audits, as well as our in-house program, we continually monitor our quality to ensure our clients get the best results possible.

Project Management

CT Laboratories firmly believes that communication is the key to every successful project. We will assign an experienced chemist as a dedicated Project Manager to handle all your needs. They can provide information for inclusion in your QAPP and can meet with you up front to discuss the project, making sure all questions and scenarios are discussed before the work arrives.


Your PM will input your project-specific requirements (special compounds, reporting limits, action levels or report formats) into our LIMS. When the work arrives at the lab, you will be notified that the samples arrived safely and of their condition.


Any problems, you will be notified immediately. After your reports have been sent, the project manager will be there to discuss the data with you.

Sampling Kits

CT Laboratories supplies sample kits for all projects, which can be delivered just about anywhere. The kits include sample containers prepackaged with the appropriate preservatives, chain-of-custody (COC) forms and seals and bottle labels. Sample labels and COCs can be sent pre-filled out with sample information.


Kits contain a temperature blank to ensure proper documentation when samples are received, as well as trip blanks and methanol blanks, where appropriate. All sample kits will have the necessary packing materials and paperwork to ensure safe shipment back to the laboratory. CT Laboratories can supply field kits, including EnCore™ and TerraCore™ Soil Sampling kits, prepared gauze wipes for PCB and Explosive sampling and more. Please take a moment to review our sample acceptance policy.


Full Service Laboratory

CT Laboratories prides itself on being a full service laboratory. We can analyze for Volatiles, Semivolatiles, Pesticides, PCBs, Metals and Classical Chemistry. We perform analyses most small laboratories don’t, such as Explosives, Volatile Fatty Acids, Dissolved Gasses, and Physical Parameters. CT Laboratories has an in-house biological laboratory offering soil and water bacterial enumeration, and drinking water coliform testing. We not only perform a wide variety of analyses, we also perform those tests on every matrix imaginable. We perform these tests on everything from clean drinking water samples to leachate, soil samples to wood-blocks, sediments to concrete cores, and from oil to paint chips. CT Laboratories can handle your analytical needs.