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Crawford Hydrology Laboratory provides professional consulting and field and laboratory services regarding groundwater tracing in karst and non-karst areas.

We specialize in groundwater investigations with the use of fluorescent dyes and utilize techniques we have developed and enhanced over the past 38 years. We provide quality supplies and analyses for groundwater traces and conduct full field investigations. Crawford Hydrology Laboratory has extensive experience conducting dye trace investigations for commercial clients as well as government agencies.

We look forward to working with you!

Dr. Crawford to be recognized at GSA

Dr. Nicholas Crawford’s pioneering contributions to karst hydrogeology will be highlighted in a special session at the 2017 meeting of the Geological Society of America in Seattle, WA.  Congratulations, Dr. Crawford!

Added Services

CHL has recently expanded to include Sodium Naphthionate and PTSA as fluorescent tracers.  We’ve also lowered detection limits for Green 8 in water and can now detect concentrations as low as 0.05 ppb.

Contact us for more information about these new and exciting offerings!


Interested in what we’ve been up to? Check out CHL in the NEWS!