Accessing Ground Water Quality Data - Summarized Data

• Interactive Maps showing Ambient GW Monitoring Locations (please be patient while this is loading)
• Water Quality Data Summary by Major Aquifer Type

Clean Water Act Section 305(b) - Report on Ground Water Quality

Section 305(b) of the Federal Clean Water Act established a process for states to report on the quality of the nation's ground water and surface water resources to U. S. EPA. Ohio EPA Division of Drinking and Ground Waters has used the Ground Water chapter of the 305(b) reports as an opportunity to expand our analysis of the available ground water quality data to characterize the water quality of the major aquifers types in Ohio. The Ground Water chapters of the recent reports are available below in PDF format.

• 2010 305(b) Report
• 2008 305(b) Report
• 2006 305(b) Report
• 2002 305(b) Report
• 2000 305(b) Report
• 1998 305(b) Report

Note: No report was done in 2004.

Accessing Ground Water Quality Data - Raw Data

 

Download Raw Data from Ohio EPA

Downloads of the complete Ambient Ground Water database for both inorganic and organic ground water data may be accessed through the links below. Two data formats for each dataset are provided: .xlsx (Microsoft Open Office XML) and .csv (comma-separated values). The .xlsx format was chosen because it lacks the worksheet size limits of earlier Excel versions. The .csv is a standard text format which can be imported to wide variety of software products. Readers needing alternative formats are encouraged to direct email requests to michael.slattery@epa.state.oh.us.

• Inorganic Ambient Data (as of 02/11) - ..xlsx and .csv formats, 16MB zipped file 
• Organic Ambient Data (as of 2/11) - .xlsx and .csv formats, 7MB zipped file 
• Data Descriptions for Inorganic and Organic Ambient data files (both .xlsx and .csv formats)

Download Raw Data from USEPA (STORET)

Ohio's ground water monitoring data are available on the U.S. EPA's web site in Modernized STORET (STORage and RETrieval). Many organizations used STORET as their primary tool for storing environmental information including biological, chemical and physical data for ground water, surface water, air and soils. However, U.S. EPA is no longer supporting STORET. 

Data available from the STORET web site (http://www.epa.gov/storet/dw_home.html) can be selected by geographic areas (state/county, latitude/longitude or watershed), by stations (facilities) or by projects. Ohio EPA's ground water monitoring data are housed under the Ohio EPA, Division of Drinking and Ground Waters Organization ID. Scroll down to the bottom of the page and select the Organization ID = 21OHDGW. All ground water data are located in the Ambient Ground Water Monitoring Program project. Selected data can be downloaded in a tilde (~) delimited text file.

 Request Data Directly from Ohio EPA

To get more information about ground water quality in Ohio, contact the Ground Water Quality Characterization Program staff at:

Ohio Environmental Protection Agency
Ground Water Quality Characterization Program
Division of Drinking and Ground Waters
P.O. Box 1049
50 West Town Street
Columbus, OH 43215-1049

Phone: (614) 644-2752
Fax:(614) 644-2909
E-Mail: christopher.kenah@epa.state.oh.us

If you are requesting geochemical data, please provide us with specific information regarding the parameters, dates, aquifer type and location that is of interest. If electronic data is requested, let us know the format you would like to receive the data (i.e., what software package will you be using to view and analyze the data). The more specific information you can provide us, the better we can tailor the data request to meet your needs.