Data quality: National Pollutant Release Inventory

Data Quality
Environment Canada implements a number of data quality measures to ensure that National Pollutant Release Inventory (NPRI) data maintains a high standard of accuracy, consistency and comprehensiveness, and meets the needs of data users.

Data Quality Management Framework

The primary objective of the NPRI Data Quality Management Framework is to ensure that NPRI data achieves and maintains a high level of quality and meets the needs of data users.

QC of Facility Reported Data

Facilities that meet NPRI reporting requirements are required by law to submit information that is true, accurate, and complete to the best of their knowledge by the annual reporting deadline (typically June 1st). The Canadian Environmental Protection Act, 1999 (CEPA 1999) sets out penalties for companies that fail to report or that knowingly submit false or misleading information.

In advance of the reporting deadline, Environment Canada provides guidance and support to facility representatives to help them better understand NPRI reporting requirements and provide quality information. Following the reporting deadline, Environment Canada reviews reported data for inaccuracies and reporting errors, and contacts facilities as necessary to verify their reports. If required, facilities are asked to resubmit their reports to correct inaccuracies and errors. The department may also conducts on-site facility visits to verify reported data.

Additional information on the NPRI quality control process and a summary of QC results are available from the links below. Information on NPRI geographic data quality is also available.

QC of Geographic Data

The accuracy of geographic data (i.e. latitude and longitude coordinates) for facilities reporting to the NPRI is important for air quality modelling, watershed analysis and other analysis purposes, as well as for visualization of facilities in mapping software such as Google Earth (TM).

In addition to efforts to improve the quality of reported information on pollutant releases and transfers, Environment Canada staff review and validate the geographic information of facilities reporting to the NPRI, using satellite imaging, legal land descriptions and other tools.

We also welcome your input. Contact us with corrections for the latitude and longitude coordinates of a facility that reports to the NPRI.


NPRI Data Search Find out about pollutant releases and transfers in Canada

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