Deadlines and most recent changes: National Pollutant Release Inventory

Please note

Due to the current situation with the global coronavirus (COVID-19) pandemic, the NPRI is amending its deadline for 2019 reporting to July 31, 2020.

This page summarizes changes to the National Pollutant Release Inventory (NPRI) reporting requirements for the 2018 and 2019 reporting periods.

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

Reporting deadline

2018 calendar year: The deadline is June 1, 2019 at 23:59:59 PDT*
2019 calendar year: The deadline is June 1, 2020 at 23:59:59 PDT

* Since June 1, 2019 is a Saturday, 2018 reports will be considered on time if they are submitted by Monday, June 3, 2019.

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:

  • Chlorinated alkanes, long-chain, CnHxCl(2n+2–x), 18 ≤ n ≤ 20
  • Chlorinated alkanes, medium-chain, CnHxCl(2n+2–x), 14 ≤ n ≤ 17
  • Analytically unresolved hydrocarbons (C10 to C16+)
  • Ethyltoluene (all isomers)
  • Methylcyclopentane (Chemical Abstract Registry Number (CAS RN) 96-37-7)
  • Other glycol ethers and acetates (and their isomers)
  • Propyl acetate (all isomers)
  • n-Propyl alcohol (CAS RN 71-23-8)

Substances deleted

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

  • Alkanes, C6-18, chloro (CAS RN 68920-70-7)
  • Alkanes, C10-13, chloro (CAS RN 85535-84-8)
  • C.I. Solvent 14 (CAS RN 842-07-9)
  • 3-Chloropropionitrile (CAS RN 542-76-7)
  • Crotonaldehyde (CAS RN 4170-30-3)
  • 2,4-Diaminotoluene (and its salts) [CAS RN 95-80-7]
  • 2-Methylpyridine (CAS RN 109-06-8)
  • p-Nitroaniline (CAS RN 100-01-6)
  • Nitrobenzene (CAS RN 98-95-3)
  • 2,4,4-Trimethylhexamethylene diisocyanate (CAS RN 15646-96-5)
  • Aniline (and its salts) [CAS RN 62-53-3]*
  • Anthraquinone (all isomers)
  • Chlorobenzene (CAS RN 108-90-7)*
  • Creosote (CAS RN 8001-58-9)
  • Diethylene glycol butyl ether (CAS RN 112-34-5)
  • Diethylene glycol ethyl ether acetate (CAS RN 112-15-2)
  • Dihydronapthalene (all isomers)
  • Dodecane (all isomers)
  • Ethylene glycol butyl ether acetate (CAS RN 112-07-2)
  • Ethylene glycol hexyl ether (CAS RN 112-25-4)
  • 2-Methyl-3-hexanone (CAS RN 7379-12-6)
  • Methylindan (all isomers) [CAS RN 27133-93-3]
  • Phenyl isocyanate (CAS RN 103-71-9)
  • Propylene glycol butyl ether (CAS RN 5131-66-8)
  • Terpenes (all isomers) [CAS RN 68956-56-9]
  • Trimethylfluorosilane (CAS RN 420-56-4)

* Please note: Aniline and chlorobenzene are still listed in Part 1A. As such, the Part 1A reporting requirements still apply.

Changes to reporting thresholds and previously listed substances

We have changed the reporting requirements for these substances:

  • the CAS RN for vanadium (and its compounds, except when in an alloy) was removed. Multiple CAS RNs can apply to this substance
  • Benzo[a]phenanthrene is listed by its more common name, chrysene
  • the listing of n-butyl acetate was changed to butyl acetate (all isomers) and includes three isomers: n-butyl acetate (CAS RN 123-86-4), isobutyl acetate (CAS RN 110-19-0), and sec-butyl acetate (CAS RN 105-46-4)
  • Anthracene was moved from Part 1 A to Part 2. The 10 tonne mass reporting threshold has been reduced to 50 kg for total polycyclic aromatic hydrocarbons, including anthracene, and 5 kg for reporting anthracene itself
  • facilities that are subject to the Chromium Electroplating, Chromium Anodizing and Reverse Etching Regulations must report releases, disposals and transfers for recycling of hexavalent chromium (and its compounds), regardless of the number of employees and regardless of the 50 kg mass threshold and 0.1% concentration threshold

Changes to reporting requirements

Explain changes in your reporting from year to year

The list of options for reporting a reason for changes in reported quantities from the previous year was adjusted and expanded to help you accurately explain changes in reported quantities. There is also a comment field in the online reporting system that you can use to provide additional information, such as details about:

  • a facility’s operations
  • the use of a substance
  • the methods used to calculate reported quantities

The information you provide in the comment boxes help data users better understand the context around the reported quantities. Clear and concise comments contribute to the completeness and accuracy of the NPRI dataset.

You must also provide a reason if you reported a substance in the previous year, but it is not required to be included in your current report (e.g., because of your pollution prevention plan).

Report releases from all sources

The Notice specifies that if emissions are already monitored or measured under provincial or federal legislation or a municipal bylaw, those measurements must be used to report to the NPRI.

Once reporting thresholds are met, you must report all releases, disposals or transfers off site for recycling, not just those that are measured or monitored (unless otherwise specified). If emissions are not monitored or measured under provincial or federal legislation or a municipal bylaw, reasonable efforts must still be taken to gather information on releases, disposals and transfers. What is “reasonable” depends on individual circumstances but may include additional monitoring for NPRI substances.

An NPRI report is mandatory for any substances that meet the NPRI reporting thresholds, regardless of whether the substance is being measured or monitored for other jurisdictions.

Report releases of < 1 tonne
You may choose to report the release as a total without specifying the environmental media (air, water or land) if total releases of a Part 1A substance are less than one tonne. We encourage you to report the break down by media, if the information is available.
Secondary and tertiary NAICS codes

You must report secondary and tertiary NAICS codes where additional activities take place at the facility that differ from the primary NAICS code. A primary NAICS code generally represents the activity with the largest value-added to the facility.

To determine which NAICS code to report as primary, secondary or tertiary, you may consider any of the following factors:

  • the proportion of the total value or income generated by the activity
  • the proportion of employees or hours spent performing the activity
  • the proportion of releases an activity contributed to the total reported quantity
  • some other combination of factors applicable to the facility
Pollution prevention activities

If you report that you implemented a pollution prevention (P2) plan, you must report the name of the Pollution Prevention Planning Notice for which the plan was prepared. If the P2 plan was prepared or implemented for another government jurisdiction or program, you must also report the name of the jurisdiction, program or requirement.

If you report not implementing new pollution prevention activities during the year, you must report any existing barriers to implementing a plan.

Shutdown periods

You must answer the following two questions about shutdown periods:

  1. Will the shutdown period occur at or around the same time in future years?
  2. Was the shutdown a partial or complete shutdown?

A shutdown period is a temporary facility closure. When all normal operations at a facility stop, this can be a "complete" shutdown. For example, if a manufacturing facility stops manufacturing for two weeks during the summer, this is a complete shutdown. Some activities, such as maintenance, may still occur at the facility, but the regular activities are suspended, affecting typical releases or transfers from the facility. Only complete shutdown periods of seven days or longer are required to be reported to the NPRI. Shorter complete shutdown periods can be voluntarily reported if the information can help interpret facility releases and transfers.

You can also voluntarily report partial shutdowns, especially where they result in a noticeable change in reported quantities for a certain time. A partial shutdown occurs when only some of the activities at the facility are stopped (for example, if one of several manufacturing lines or one of several boilers or electricity generating units is shut down temporarily for maintenance). This information is useful for data interpretation since it can also affect typical releases or transfers from a facility during the partial shutdown. For partial shutdowns, facilities can provide details in the shutdown period comment field provided in the online reporting system.

The shutdown period fields in the reporting software should only be used to indicate when a facility is temporarily closed. You should submit a facility closure report if your facility closes permanently.

Stack information
You must report the geographical coordinates (latitude and longitude) of a stack in decimal degrees to at least five decimal places. Where applicable, you must also report provincial identification numbers of each stack.
Oil and gas facilities: CAC and other specific reporting requirements

If your facility is classified under the NAICS Canada code 211110 (Oil and gas extraction, except oil sands), is not a compressor station, and has less than 10 full-time employees, you must report for all criteria air contaminants (CAC) and Part 5 benzene from all sources if the reporting threshold for at least one CAC is met.

Light and medium crude oil batteries of an oil throughput equal to or greater than 1900 m3 per year must report volatile organic compounds and benzene emissions from storage tanks, regardless of whether air release thresholds are met. Batteries are defined as field facilities that process conventional crude oil, separating natural gas, crude oil and water.

You must also report all Petrinex numbers associated with their NPRI ID as part of your provincial identification numbers.

Report emissions from electricity generation at the unit level

You must report mercury and criteria air contaminant releases to air for each electricity generation unit* that meets the following two criteria:

  1. the unit has a capacity of 25 MW or more
  2. the unit distributes or sells to the grid 33% or more of its potential electrical output**

The 33% threshold must be assessed on an annual basis. If a unit meets the 33% threshold in a calendar year, but does not meet it in the subsequent year, you still have to report at the unit level for that unit.

You must also provide details about the unit, including:

  • unit gross generating capacity
  • commissioning year
  • technology or fuel type
  • whether the unit includes emissions from duct firing or other secondary combustion sources
  • air pollutant controls installed and operating on the unit

*An electricity generation unit means physically connected equipment that operates together to produce electricity for sale or distribution to the grid by means of thermal energy, is stationary when used and is not in or on a machine that is self-propelled.

**Potential electrical output means the quantity of electricity that would be generated by a unit in a calendar year if the unit were to operate at capacity at all times during that calendar year.

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