Data quality: National Pollutant Release Inventory

Environment and Climate Change Canada’s (ECCC) data quality management framework ensures that NPRI information meets the needs of data users.

Quality control

Facility-reported data

  • Facilities must report to NPRI by the annual deadline, typically June 1.
  • The Canadian Environmental Protection Act, 1999 sets out penalties for companies that fail to report or that knowingly submit false or misleading information.
  • ECCC staff help facility representatives understand NPRI reporting requirements and prepare accurate reports.
  • ECCC checks the reports for inaccuracies and reporting errors, and may contact or visit facilities to verify or correct information.

Geographic data

  • Accurate location coordinates for NPRI reporting supports air quality modelling as well as watershed and other analyses.
  • Geographic data, using mapping software such as Google EarthTM, helps visualize facilities.
  • ECCC staff use satellite imaging, legal property descriptions and other tools to validate the geographic information of facilities reporting to NPRI. Contact NPRI to correct any of this information.


  • NPRI data quality management framework - the elements of NPRI data quality, and a summary of current and planned data quality initiatives.
  • Using and interpreting NPRI data - Important considerations for NPRI analysis.
  • Query tool - Search detailed information on pollutant releases (to air, water and land), disposals and transfers for recycling reported by facilities to the National Pollutant Release Inventory (NPRI) from 1994 to 2017

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