John AyarbeJohn Ayarbe, PG

Principal Hydrologist

Albuquerque, New Mexico


(505) 822-9400

John Ayarbe, PG, is a Senior Hydrologist with more than 18 years of professional experience in the environmental consulting industry. Most of his recent experience is related to supporting the mining industry and solid waste landfills with groundwater compliance matters in New Mexico. His specializations include environmental permitting and compliance, groundwater and vadose zone hydrology, and environmental site characterization. He manages all aspects of projects including negotiating and interfacing with regulators, preparing and overseeing project schedules and budgets, evaluating data, and preparing reports. He holds an MS in Hydrology from the New Mexico Institute of Mining and Technology and is a registered Professional Geologist.

Mr. Ayarbe works with a range of clients, including private sector clients such as Barrick Gold Corporation, Freeport-McMoRan Inc. (FMI), and Waste Management, Inc. (WM), and federal and state agencies such as the U.S. Army Corps of Engineers (USACE), Texas Commission of Environmental Quality (TCEQ), and New Mexico  Environment Department of Transportation (NMED).


  • Education

    MS, Hydrology, New Mexico Institute of Mining and Technology

    BS, Environmental Science, New Mexico Institute of Mining and Technology

  • Registration / Certification

    Professional Geoscientist Texas

    Professional Geologist Idaho

  • Specializations

    Groundwater and vadose zone hydrology

    Environmental site characterization

    Aquifer testing and analysis

    GIS and database development

  • Affiliations

    New Mexico Mining Association

    Society for Mining, Metallurgy and Exploration

    Solid Waste Association of North America

  • Additional Training

    OSHA 40-Hour HAZWOPER Training

    OSHA 8-Hour Supervisor/Manager Training

    OSHA 10-Hour Construction Safety Training

    Advanced Aquifer Test Analysis, Midwest Geosciences Group

    GoldSim Training, Focus: Water Resource Applicatoins

    Improving Hydrogeologic Analysis of Fractured Bedrock Systems, Midwest Geosciences Group

    Hazard Communication and Awareness of Hydrogen Sulfide

    Modeling Water Flow and Contaminant Transport in Soils and Groundwater Using the Hydrus Computer Software Packages, Colorado School of Mines

    MODFLOW, National Ground Water Association

Select Publications and Presentations

Ayarbe, J., Isaacson, K., G. Peterson, and J. Kelsey. 2015. Stormwater facilities to reduce ARD and Improve Pit Lake Water Quality. Presented at New Mexico Mining Association Annual Conference. Bernalillo, New Mexico, September 10, 2015.

Umstot, T., Schnaar, G., Blandford T.N., Cullen, S., Kaiser, P., Ayarbe, J., 2015. Recharge estimates from a soil water-balance model improve groundwater model calibration. Presentation at the MODFLOW and More 2015: Modeling a Complex World conference. May 31 – June 3, 2015. Golden, Colorado.

Sweetland, N., T. Umstot, J. Ayarbe, and D. Stephens. 2006. Processes influencing the transport of perchlorate through the vadose zone. Presented at Perchlorate: Progress Toward Understanding and Cleanup Symposium. Sponsored by Groundwater Resources Association of California. January 26, 2006.

Phillips, F.M., J.P. Ayarbe, J. Bruce, J. Harrison, and D. Elmore. 2003. Dating rupture events on alluvial fault scarps using cosmogenic nuclides and scarp morphology. Earth and Planetary Science Letters 215: 203-218.

Ayarbe, J.P., and T.L. Kieft. 2000. Mammal mounds stimulate microbial activity in a semiarid shrubland. Ecology 81(4): 1150-1154.