Note: The tool uses discharge monitoring report (DMR) data from ICIS-NPDES to calculate pollutant discharge amounts. EPA has verified the accuracy of the tool’s calculations. EPA has also performed a limited review of the underlying data that has focused on facilities with the largest amounts of pollutant discharges. Due to the large amount of DMR data, some errors exist in ICIS-NPDES DMR data. Please see the User Guides page for instructions on how to use the tool and how to correct errors in ICIS-NPDES. The tool also uses wastewater pollutant discharge data from the Toxics Release Inventory (TRI). Contact Us with any comments or questions about the tool, and sign up for our e-mail news bulletin to be notified when new data, enhancements, or training materials become available.
Instructions. This TRI Search provides quick access to reported wastewater discharges to surface waters (e.g., lakes, rivers, or streams) or transfers to municipal sewage treatment plants (a.k.a. Publicly Owned Treatment Works (POTWs)). The boxes below provide search options to help you determine where discharges are occurring (Location or Watershed Box), what pollutants are discharged (Pollutant Box), and who the dischargers of interest are (Industry Box). Change the criteria in one or more of the boxes below and click the Search button to retrieve the reported TRI releases to surface waters ("direct dischargers") or POTWs ("indirect dischargers"). For more information about how to use this search feature, refer to TRI Search Help and Frequently Asked Questions and Answers (FAQs).