Discharge Monitoring Report (DMR) Pollutant Loading Tool
- EZ Search
- TRI Search
- Facility Search
- Advanced Search
- Data Explorer
- Everyday Searches
- User Guides/Tech Documents
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. These “everyday” searches use DMR data from ICIS-NPDES and provide specialized search options that are not available using the EZ Search (DMR) or Advanced Search. For more information on using these Everyday Searches, refer to the Everyday Searches User Guide (PDF) (16 pp, 2MB) and User Guides/Tech Documents.
Search EPA Lookup Tables. These look up tables provide an easy way to access information and the connections used by the Loading Tool. For example, you can use your zip code to find the name of your watershed.
Facility Loading Calculations. This search will allow you to review the exact monitoring data and formulas that the Loading Tool uses to calculate the annual estimates of pollutant discharge loading calculations for a single facility. This search is particularly useful for identifying potential data errors.
Loading Trends Charts. Search by geographic location, pollutant, and/or industry category and visually compare pollutant discharge amounts over multiple years.
Top Industrial Dischargers of Toxic Pollutants. This search provides a listing of the industrial sectors, grouped by EPA’s Effluent Guidelines Point Source Categories, by the cumulative amount of toxic pollutant discharges (in units of toxic-weighted pound equivalents or ‘TWPE’).
TRI and DMR Comparison Dashboard. View multiple charts displaying DMR and TRI discharge information at a national, regional, or state level.
Permit Fact Sheet Tables. View all NPDES permit measurements and limits in a tabular format for an individual facility over a selected year range. This search is particularly useful for technical users (e.g., NPDES permit writers, regulatory agencies).
Indirect Industrial Discharger Report. This search provides a downloadable file that links TRI indirect discharge information to the receiving POTW information.
Exceedance and Load over Limit Searches
Effluent Limit Exceedances Search. Search by geographic location, pollutant, facility name or identifier, and/or industry to identify instances where discharge monitoring self reporting data indicates there was an exceedance of the NPDES permit effluent limit. View and print a facility report showing all effluent exceedances and corresponding limits for each outfall, pollutant, and monitoring period within a specific date range (up to 5 years).
Exceedance Charts. Search by geographic location, pollutant, and/or industry to visually compare the number of facilities with effluent limit exceedances and the magnitude of these exceedances (grouped as percentages over the effluent limit) over multiple years.
Facility Exceedance Counts. Using a facility name or unique identifier you can identify the months when a facility has exceeded its permitted effluent limit for each outfall at the facility.
Load Over Limit Summary. Search by year, geographic location, and/or industry to generate a data file showing facility information, the total facility load over effluent limit, top load over effluent limit parameter, and the parameter load over effluent limit for each reporting year.
Facility Counts and Summaries
Based on Pollutant Discharges. This search counts facilities, summarizes pollutant discharge amounts, and groups these data by state, pollutant, and industrial sector. You can search by year, geographic location, pollutant, and industry category. This search is particularly useful if you would like to count the number of facilities that have effluent discharges for a particular pollutant and group these counts by state or industrial sector.
Based on Permit Effluent Limits and Measurements. This search counts facilities, summarizes pollutant discharge amounts, and groups these data by state, pollutant, and industrial sector. You can search by year, geographic location, pollutant, and industry category. In addition, you can search on effluent limit type and amount. This search is particularly useful if you would like to count the number of facilities that have effluent limits for a particular pollutant and group these counts by state or industrial sector.
State Statistics and Loadings. Generate counts and loadings of major and minor facilities by state and EPA region for a selected year.
Watershed Statistics and Loadings. Generate facility counts and loadings by watershed(s). Download facility attribute information for facilities within a selected watershed(s). This search is particularly useful for watershed modelers and mapping applications.
Hypoxia Task Force Searches
Nutrient Modeling. This search provides facility totals for aggregated nitrogen and aggregated phosphorus loads. The search includes nutrient loads calculated using DMR data as well as modeled nutrient loads for facilities that are likely to discharge Nitrogen and/or Phosphorus, but do not report Nitrogen or Phosphorus discharges on their DMRs.
Annual Loadings Report. This search provides aggregated nitrogen and aggregated phosphorus loads summed by State or Point Source Category. User may view Nitrogen and Phosphorus loads side by side for all facilities, or compare POTW and Non-POTW nitrogen or phosphorus loads. This search may also be used to generate statistics by state or point source category of facilities with permit limits and effluent monitoring requirements for nitrogen and phosphorus.
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