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Nonpoint Source Water Pollution

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e303d Tutorial

This one-stop water quality navigation application was created to provide a more complete picture on activities and information available about water quality, watershed health, and the activities that have been on-going in the Office of Water Quality’s Total Maximum Daily Load (TMDL), Integrated Report, and Nonpoint Source Programs. For an overview on how to use the Online e303d Tool to find pertinent information in your area, follow the instructions below.

Find By/Base Maps Tools

e303D "Find By" Menu
Find By

e303d Base Maps Toolbar
Base Maps

e303d Zoom Slider
Zoom Slider

Upon opening the application, you will see the statewide view, a zoom slider with full extent button, and 2 query tool boxes for navigating and searching the data. The Base Maps bar offers 3 different backgrounds on which to display the impaired waters data. The default is Streets, but the Imagery (the 2005 aerial orthophotography) and Topo (the USGS Topographic maps) are also provided.

The e303d box in the top illustration offers different options for zooming directly to an address, a county, a watershed, or a waterbody (by type). The address requires street address, city, and zip code. The county is a pick list of Indiana counties. Watersheds can be searched by name or hydrologic unit code (HUC) chosen from a pick list and/or keyboard input. Once you select one, the map will automatically zoom to the selection and highlight a watershed, city, or county area selection.

Water Quality Assessments by Use and Assessment Categories

e303d "Water Quality For" Toolbar

Under Water Quality For: there are 3 radio buttons that represent the use assessment types of Fishing, Recreation, and Aquatic Life as used in the biennial Integrated Report. The default type is Fishing and the different line colors with category numbers refer to the categories assigned to each water body. These categories are explained in the popup that appears by placing the cursor on a waterbody.

e303d Browsing Tools
Tool Bar

e303d Legend Window
Legend Window

From a zoomed in extent, select a stream by hovering your cursor over a stream feature. A popup will provide the description of each category referenced by assessment use type. While all related use types are in the popup for that location, the colors on the map show the value for the radio button chosen only. In the illustration below, the use shown on the map is the Fishable Use Category. To be sure, check the Water Quality For: menu bar which will remain on the screen for easy reference.

Anytime you have not selected a water body with your cursor you can see the colors of all water bodies in the map extent in the Legend box. The Legend box can be activated as a separate window by clicking on the Legend icon in the Tools bar. From the Water Quality For: tool bar, selecting another assessment use type will cause the colors to change on the mapped water bodies based upon the impairment parameters that most affected the use selected. Click on each radio button to see the changes.

Waterbody Information

To review the information about a specific water body, place the cursor on it and a window pops up with the Assessment Unit Name, the Reach Code, and what has been found in the water. This may include 1 or more impairments or, if there are none, a message stating that there are none will be displayed. Below the impairments listings are the categories numbered and further explained. If an impairment category is listed, it is hyperlinked to a list of impairment descriptions. If there was a TMDL Report written for the impairment, a hyperlink of the document name will be listed beside the impairment. This hyperlink opens a new window to the browser where the report summary will be found along with the links to the complete report. Also provided are hyperlinks to completed watershed management plans. The link takes you to a new window again with the summary page along with the links to the completed plan.