WLCN11 CWTO 120242 SMOG ADVISORY ENDED JOINTLY BY ENVIRONMENT CANADA AND THE ONTARIO MINISTRY OF THE ENVIRONMENT AT 10:42 PM EDT TUESDAY 11 OCTOBER 2011. SMOG ADVISORY ENDED FOR.. CITY OF HAMILTON. POLLUTANT CONCENTRATION LEVELS HAVE DECREASED BELOW THE THRESHOLD FOR POOR AIR QUALITY, AND ARE NOT EXPECTED TO INCREASE. AS A RESULT, THE SMOG ADVISORY HAS ENDED. END/OSPC/MOE