Texas State University Logo

EARDC Resources


Join the Conversation

adjust type sizemake font smallermake font largerreset font size

Edwards Aquifer Research & Data Center


  Director of EARDC                                                                                             tni symbol  

Dr. Glenn Longley, Director

Welcome to the Edwards Aquifer Research & Data Center (EARDC).  We are a NELAC certified lab and research center found within the College of Science & Engineering. EARDC was established in 1979 with special funding for Texas State University to provide a public service in the study, understanding and use of the very fragile natural resource, the Edwards Aquifer. 

EARDC takes an active role in water education issues and works daily with public schools as well as institutions of higher education.  The Edwards Aquifer Research and Data Center has been providing water analysis services since 1979. Samples are analyzed from wells, springs, rivers, municipalities, and wastewater treatment facilities for a variety of chemical and biological constituents.

The Edwards Aquifer Research & Data Center is organized around four different areas; Data Center, Technical Center, Education Center and Research Center.

NELAC Accredited Lab Services


EARDC Laboratory offers different types of water quality analysis and services.  (Click Here

Aquatic Camp Activities (click image to enlarge)

Aquatic Studies Field Days  (Click Here)

Spend the day studying the biological, geological and hydrological wonders of the Edwards Aquifer a large limestone groundwater system and the San Marcos River, both located in the beautiful Central Texas Hill Country.




Friday, Apr. 18, 2014 9:00 a.m. to 4:30 p.m

Southwest Research Institute

San Antonio, Texas


Dr. Sasowsky

Dr. Sasowsky will present a 1-day lecture/workshop on deciphering karst terrains and
applying karst information to geoscience problems. Attendees will acquire strategies
for data analysis and how to apply paleomagnetic dating in cave systems, as well as
learning about a diversity of karst landscapes and issues from across the world.
- Data analysis in the geosciences: visualizing, finding, & communicating patterns;
- The challenge of studying "what is not there";
- The age of caves, meaning, overview of methods;
- Cave sediments - information recording and retrieval;
- Non-traditional karst
- Glaciated terranes - are caves destroyed?
- Sandstone caves, truly karst?
- Caves in banded iron formations, possible microbial contribution;
- Problems in karst areas
- Impact of mining on carbonate water quality;
- Poor drilling practices = dewatering of aquifers;
- The role of cavers and scientists in understanding and protecting karst.
Dr. Sasowsky is Professor of Geosciences at the University of Akron (Ohio), where he
and his students investigate linkages between karst, landscape development, and
water movement. He received his BS (Geology) at the University of Delaware, and
MS and PhD degrees from Pennsylvania State University. Prior to his current
position he worked as a hydrogeologic consultant, specializing in karst settings, and
in the petroleum industry.
His career has involved field investigations in 30+ states, Mexico, the Caribbean,
Europe, and South America. He served for 15 years as the earth sciences editor for
the Journal of Cave and Karst Studies, and currently is co-editor of Environmental
and Engineering Geoscience. His contributions have been recognized by the
Geological Society of America (Fellow, Hydrogeology Division Distinguished Service
Award) and the National Speleological Society (Fellow, Ralph Stone Award,
Certificate of Merit, Science Award).


Southwest Research Institute
South Texas Geological Society
Texas Water Development Board
UTSA – Center for Water Research
Texas Bureau of Economic Geology
Texas Groundwater Association
Edwards Aquifer Research & Data Center
UT- Austin, Jackson School of Geosciences
Texas Water Conservation Association
River Systems Institute, Texas State University
National Cave and Karst Research Institute
Edwards Aquifer Authority


cape seminar


 Dr. Katherine Hayhoe
Professor of Atmospheric Sciences, Texas Tech University

Click here for presentation.