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Clean Water Act Pollutant Loading Tool
- About the Clean Water Act Pollutant Loading Tool
- How to Integrate Pollutant Loading Data into Facility Search Results
- Definition of Pollutant Loading Data Fields
About the Clean Water Act (CWA) Pollutant Loading Tool
The CWA Discharge Monitoring Report (DMR) Pollutant Loading Tool was designed to help users determine who is discharging, what pollutants they are discharging and how much, and where they are discharging. The tool calculates pollutant loadings from permit and DMR data from EPA's Permit Compliance System (PCS) and Integrated Compliance Information System for the National Pollutant Discharge Elimination System (ICIS-NPDES). Data is available for the years 2007 through 2010. Pollutant loadings are presented as pounds per year and as toxic-weighted pounds per year to account for variations in toxicity among pollutants. The tool ranks dischargers, industries, and watersheds based on pollutant mass and toxicity, and presents "top ten" lists to help you determine which discharges are important, which facilities and industries are producing these discharges, and which watersheds are impacted.
The tool also includes wastewater pollutant discharge data from EPA's Toxics Release Inventory (TRI). Data is available for the years 2007 through 2010. Users can search TRI data to find the facilities with the largest pollutant discharges to surface waters or sewage treatment plants (a.k.a. Publicly-Owned Treatment Works). Users can also compare the DMR data search results against TRI data search results and vice versa. The tool clearly labels the source of data when displaying search results but does not mix TRI or DMR data when calculating pollutant discharges.
How to Integrate Pollutant Loading Data into Facility Search Results
Users can integrate Pollutant Loading data into their ECHO results in multiple ways.
- How to integrate Loading columns (most recent year) into ECHO Clean Water Data Search results
- Step 1 - Click on the "Pollutant Report" button available on the ECHO Clean Water Data Search results pages. The button will be present only on searches that return less than 400 results. The pollutant data that is integrated will always be from the most recent year available. To view earlier years of data, visit the Detailed Pollutant Loading Report.
Once a user clicks on the "Pollutant Report" button, three default pollutant columns will be appended to the user's results.
- Step 2 - The user then has the option of adding additional pollutant columns to the results page by clicking the "Add/Remove Columns" button.
- Step 1 - Click on the "Pollutant Report" button available on the ECHO Clean Water Data Search results pages. The button will be present only on searches that return less than 400 results. The pollutant data that is integrated will always be from the most recent year available. To view earlier years of data, visit the Detailed Pollutant Loading Report.
- How to access the Detailed Pollutant Loading Report
- Click on the "L" button found in the "Facility Information" column on the All Data and Clean Water Data Search results. The "L" button is available only for CWA records, and only when limit data has been entered into EPA's data systems.
- Click on the "L" button found in the "Facility Information" column on the All Data and Clean Water Data Search results. The "L" button is available only for CWA records, and only when limit data has been entered into EPA's data systems.
Pollutant Loading Data Dictionary
The Pollutant Loading Data Dictionary details the pollutant loading fields currently available in ECHO.