A station is a site on a river or lake where water quantity (water level and flow) are collected and recorded.

This notice applies to owners of facilities that manufacture or use greater than 100 kg of siloxane D4 per year (alone or in a mixture), release effluents containing siloxane D4, and are involved in the activities specified in the notice. This notice has been in effect since June 2, 2012, for facilities who manufacture or use siloxane D4. Although the initial facilities subject have completed their obligations this notice is still in effect. This means that new facilities could become subject if they meet the requirement(s) of the notice. For more information please refer to the Notice link provided below.

Climate Normals and Averages are used to summarize or describe the average climatic conditions of a particular location. At the completion of each decade, Environment and Climate Change Canada updates its Climate Normals for as many locations and as many climatic characteristics as possible. The Climate Normals, Averages and Extremes offered here are based on Canadian climate stations with at least 15 years of data between 1981 to 2010.

Provides public access to archived sediment data (daily loads, daily concentration, instantaneous concentration) for stations of interest using search criteria. The sediment monitoring program discontinued in 1989. Archived sediment data are disseminated both online and offline via MS Access file.

This notice applies to owners of dental facilities that perform activities in relation to dental amalgam or elemental mercury. This notice has been in effect since May 8, 2010, for owners of dental facilities. Although the initial facilities subject have completed their obligations, this notice is still in effect. This means that new facilities could become subject if they meet the requirement(s) of the notice. For more information please refer to the Notice link provided below.

The daily mean is the average of all unit values for a given day.

This notice applies to owners of facilities that manufacture or use greater than 100 kg of bisphenol A per year (alone or in a mixture), release effluents containing bisphenol A, and are involved in the activities specified in the notice. This notice has been in effect since April 14, 2012, for facilities who manufacture or use BPA. Although the initial facilities subject have completed their obligations, this notice is still in effect. This means that new facilities could become subject if they meet the requirement(s) of the notice. For more information, please refer to the Notice link provided below.

This notice applied to owners of textile mills that manufactured textile using wet processing, used nonylphenol and its ethoxylates, and discharged their effluents, with a daily flow greater than 30 m3, to an off-site wastewater treatment facility. This notice was in effect from December 4, 2004 to January 31, 2010, for textile mills that used wet processing. It is now completed. For more information please refer to the Notice link provided below.

The annual maximum and minimum instantaneous data are the maximum and minimum instantaneous values for a given year.

This notice applied to manufacturers of vehicles that contained mercury switches and owners of steel mills that processed end-of-life vehicles or steel scrap from end-of-life vehicles. This notice has been in effect since December 29, 2007, for automobile and steel manufacturers. Although the initial facilities subject have completed their obligations this notice is still in effect. This means that new facilities could become subject if they meet the requirement(s) of the notice. For more information please refer to the Notice link provided below.