This document provides a full guidance for using the Water Quality Exchange (WQX) Web site.
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- WQX Web User Guide (PDF)(113 pp, 3 MB)
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Summary of Changes in Version 2.5 (PDF)(15 pp, 1 MB)
Detailed instructions on version 2.5
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Summary of Changes in Version 2.6 (PDF)(24 pp, 7 MB)
Summary of changes in Version 2.6