The NAPS Annual Data Summary for 2003 was first made available on the website on April 18, 2005, and then revised on May 2, 2005. The current report was revised on June 15, 2005, and is now available in hard-copy.

Changes to NAPS Data Summary for 2003

May 2, 2005
Corrections to lead data to three significant digits from two.
Revision of detection limit for lead.
Revisions to PM2.5 and PM10 data for NAPS station 101101, Chilliwack, BC.

June 15, 2005
Revisions to PM2.5 data for NAPS stations 030120, 030310 Nova Scotia.
Corrections to report formatting and the table of contents.
Deletion of the section on measurement detection principles.