Home2013 Treaties and Agreements ...Canada (13-212) – Agreement Protocol on Great Lakes Water Quality hide Canada (13-212) – Agreement Protocol on Great Lakes Water Quality TIAS Office of Treaty Affairs February 12, 2013 Pollution: Great Lakes Water Quality Protocol amending the agreement of November 22, 1978, as amended. Signed at Washington September 7, 2012; entered into force February 12, 2013. With appendix. Download attachment [4 MB] Tags Canada Pollution Treaties