This tool can be used to display an interactive line graph of well readings between 2 selected dates. By clicking and dragging your mouse in the plot area, you can zoom in on the displayed data as well. You also have the option to print the resulting chart, or download an image or vector file in the following formats: JPG, PNG, PDF, SVG. Click on the corresponding icon located in the upper right corner of the line graph that is generated.

Use the following steps to generate your graph:

1. Select the index you want the line graph to display and click Submit
2. On the next page, select your date ranges. Pay attention to the allowed date range for each index. Then click Submit.
3. Your chart will be displayed. Interact with the chart by dragging your mouse in the plot area to zoom in on the data and print or download an image of the resulting chart as needed.
4. To create a new chart, click on the "Create New Chart" that is below the generated line graph.

Due to current technical difficulties the number reported from J-27 (Uvalde) may be inaccurate and subject to future correction.

Well: Select Bexar J-17 Uvalde J-27 Comal Springs San Marcos Springs