Deadlines and most recent changes: National Pollutant Release Inventory

This page summarizes changes to the National Pollutant Release Inventory (NPRI) reporting requirements for the 2020 and 2021 reporting periods.

 The Guide for reporting to the NPRI contains more explanations of the NPRI requirements.

Reporting deadline

2020 calendar year: The deadline is June 1, 2021 at 23:59:59 PDT
2021 calendar year: The deadline is June 1, 2022 at 23:59:59 PDT

Please note: Reports under other programs (such as the Ontario Toxics Reduction Act, 2009) may have other reporting deadlines. Verify the deadline dates and times with those programs.

Changes to NPRI substances

Substances added

You may need to report releases, disposals and transfers of these substances:

  • Naphthenic acid fraction compounds (and their salts)
  • 2-Propanone, reaction products with diphenylamine, also known as PREPOD (Chemical Abstract Registry Number (CAS RN) 68412-48-6)
  • 1,4-Benzenediamine, N, N’-mixed phenyl and tolyl derivatives, also known as BENPAT (CAS RN 68953-84-4)
  • Azo disperse dyes, a group of 26 azo disperse dyes with molar weights below 360 g/mol

Read the Guide for Reporting to the NPRI for more details and specific descriptions of what substances you need to report.

Substances deleted

You no longer need to report releases, disposals and transfers of these substances:

  • C.I. Disperse Yellow 3 (CAS RN 2832-40-8)
  • Decabromodiphenyl oxide (CAS RN 1163-19-5)
  • Adipic acid (CAS RN 124-04-9)
  • Heavy alkylate naphtha (CAS RN 64741-65-7)
  • White mineral oil (CAS RN 8042-47-5)

Changes to reporting thresholds and previously listed substances

We have changed the reporting requirements for these substances:

  • Propylene glycol methyl ether acetate (PGMEA) has been moved from the Other Groups and Mixtures section to the Isomer Groups section of the Part 5 list. All isomers of PGMEA must now be reported: alpha-PGMEA (CAS RN 108-65-6), beta-PGMEA (CAS RN 70657-70-4), and mixtures of PGMEA (CAS RN 84540-57-8).

Changes to reporting requirements

Pollution prevention activities

There are no changes to pollution prevention (P2) reporting for 2020 reporting. Beginning with 2021 reporting, if you report P2 activities you will be required to link the activities to specific substances. You will no longer need to answer questions about whether your P2 plan addresses, substances, energy or water conservation, and whether you updated the plan during the calendar year. You will still be asked:

  • If you have a documented P2 plan
  • The reason for the plan, or why it was not implemented
  • Which P2 planning notice applies
  • To describe the plan in a comment field
  • If you participated in another type of organized P2 plan or strategy
Iron ore pelletizing 

If your facility produces iron ore pellets using an induration furnace, you are now required to report releases, disposals, and transfers of dioxins, furans, and hexachlorobenzene.

Toxicity equivalency factors for dioxins and furans 

We updated the toxicity equivalency factors for the following dioxin and furan congeners:

  • 1,2,3,7,8-Pentachlorodibenzo-p-dioxin (CAS RN 40321-76-4)
  • Octachlorodibenzo-p-dioxin (CAS RN 3268-87-9)
  • 2,3,4,7,8-Pentachlorodibenzofuran (CAS RN 57117-31-4)
  • 1,2,3,7,8-Pentachlorodibenzofuran (CAS RN 57117-41-6)
  • Octachlorodibenzofuran (CAS RN 39001-02-0)
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