ALL POLLUTANT CATEGORIES


Nitrogen Pollutant Category

All parameters for total nitrogen, organic nitrogen, total kjedahl nitrogen, nitrite, nitrate, and ammonia are included. Section 3.1.3 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies nitrogen parameters and aggregates nitrogen loads.

Search Considerations: The Loading Tool selects pollutant loadings for the Nitrogen category if the loadings are associated with parameter codes in ICIS-NPDES and PCS that are on the nitrogen list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Phosphorus Pollutant Category

All phosphorus and phosphate pollutant parameters. Section 3.1.3 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies phosphorus parameters and aggregates phosphorus loads.

Search Considerations: The Loading Tool selects pollutant loadings for the Phosphorus category if the loadings are associated with parameter codes in ICIS-NPDES and PCS that are on the phosphorus list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Organic Enrichment Pollutant Category

All biochemical oxygen demand (BOD) and chemical oxygen demand (COD) pollutant parameters. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies organic enrichment parameters and calculates the total organic enrichment load.

Search Considerations: The Loading Tool selects pollutant loadings for the Organic Enrichment category if the loadings are associated with parameter codes in ICIS-NPDES and PCS that are on the organic enrichment list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


TRI Chemicals Category

All pollutants that are associated with chemicals that are reported to EPA's Toxics Release Inventory (TRI) Program.

Search Considerations: The Loading Tool selects pollutant loadings for the TRI Chemicals category if the pollutants are linked to chemicals that are reported to TRI. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Solids Pollutant Category

All parameters for suspended and settable solids. This category does not include chemical-specific solids, such as suspended copper. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies solids parameters and calculates the total solids load.

Search Considerations: The Loading Tool selects pollutant loadings for the Solids category if the loadings are associated with parameter codes in ICIS-NPDES and PCS that are on the solids list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Pathogen Indicators Pollutant Category

All parameters for total coliform, streptococci, and enteric. The Pathogen pollutant category query in EZ Search is the only query option for users to view discharges of pathogens. Because these parameters are reported in units that cannot be expressed as a mass discharge (count per 100 mL), they are excluded from all other Loading Tool searches. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies pathogen indicator parameters and calculates the pathogen indicator discharges.

Search Considerations: The Loading Tool selects pollutant measurements for the Pathogen Indicators category if the measurements are associated with parameter codes in ICIS-NPDES and PCS that are on the pathogen indicators list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Metals Pollutant Category

All metals parameters. Hexavelent or trivalent metals and metals in ionic form (e.g., hexavalent chromium and aluminum, ion) are included, but metal compounds (e.g., calcium chloride) are not included. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies metals parameters and calculates the total metals load.

Search Considerations: The Loading Tool selects pollutant loadings for the Metals category if the loadings are associated with parameter codes in ICIS-NPDES and PCS that are on the metals list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Clean Water Act Priority Pollutants Pollutant Category

All 126 pollutants that EPA currently defines as priority pollutants. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies and priority pollutant parameters and calculates total priority pollutant loads.

Search Considerations: The Loading Tool selects pollutant loadings for the Priority Pollutants category if the loadings are associated with parameter codes in ICIS-NPDES and PCS that are on the priority pollutants list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


CERCLA Priority Pollutants Pollutant Category

Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) hazardous substances are substances that are considered severely harmful to human health and the environment. Many are commonly used substances which are harmless in their normal uses, but are quite dangerous when released. They are defined in terms of those substances either specifically designated as hazardous under the Superfund law, or those substances identified under other laws.

Superfund's definition of a hazardous substance includes the following:

  • Any element, compound, mixture, solution, or substance designated as hazardous under section 102 of CERCLA.
  • Any hazardous substance designated under section 311(b)(2)(a) of the Clean Water Act (CWA), or any toxic pollutant listed under section 307(a) of the CWA. There are over 400 substances designated as either hazardous or toxic under the CWA.
  • Any hazardous waste having the characteristics identified or listed under section 3001 of the Resource Conservation and Recovery Act. Any hazardous air pollutant listed under section 112 of the Clean Air Act, as amended. There are over 200 substances listed as hazardous air pollutants under the Clean Air Act (CAA).
  • Any imminently hazardous chemical substance or mixture which the EPA Administrator has "taken action under" section 7 of the Toxic SubstancesControl Act.

Temperature Pollutant Category

All wastewater temperature parameters for measuring wastewater temperature in degrees Fahrenheit and Celsius. The Loading Tool presents all measurements in degrees Fahrenheit. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies and selects temperature parameters.

Search Considerations: The Loading Tool selects temperature measurements for the Temperature category if the measurements are associated with parameter codes in ICIS-NPDES and PCS that are on the temperature list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.


Wastewater Flow Pollutant Category

All wastewater flow parameters for measuring wastewater flows in millions of gallons per day, gallons per day, and gallons per minute. The Loading Tool presents all flows in millions of gallons per day and millions of gallons per year. Section 3.3.2 of the Technical Users Background Document for the DMR Pollutant Loading Tool describes how the Loading Tool identifies and selects wastewater flow parameters.

Search Considerations: The Loading Tool selects measurements for the Wastewater Flow category if the measurements are associated with parameter codes in ICIS-NPDES and PCS that are on the wastewater flow list. This list is available in the Technical Users Background Document for the DMR Pollutant Loading Tool.