Overview

The NAtChem/Precipitation Chemistry Database system was set up by Environment Canada's Meteorological Service of Canada (MSC) in 1987 as a Canadian central database and analysis facility to accommodate and maintain diverse and variable network data and combine them together in one database. Its main purpose is to determine the chemistry of regional-scale precipitation in Canada and the U.S. Data are collected from Canadian federal and provincial monitoring networks and major U.S. networks. The Database Management System is composed of a data analysis system and three distinct databases: the Network Information System (NIS), the Site Information System (SIS), and the Chemistry Information System (CIS). The data analysis system and all three databases are housed at MSC, Toronto, Ontario. The system provides highly-resolved spatial distribution maps of wet deposition and associated analyses by merging data from all possible sources. The data, maps and special data analyses will be provided by request.