Page 10: Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Radiological Parameters

Appendix C: Provincial/territorial monitoring surveys

Table C-1. Summary of the results of 14 years of monitoring for natural radionuclides at Elliot Lake, Port Hope, and Regina
Year Elliot Lake Port Hope Regina
226Ra Uranium 226Ra Uranium 226Ra Uranium
(Bq/L) (µg/L) (µg/L) Symbol (Bq/L) (µg/L)
1983 0.015 2.0 NDTable C-1 Footnote 1 0.7 ND 7.1
1984 0.016 1.7 ND 0.8 ND 7.7
1985 0.019 1.1 ND 0.6 ND 5.3
1986 0.017 1.1 ND 0.8 ND 4.0
1987 0.016 0.6 ND 0.6 ND 2.7
1988 0.014 1.2 ND 1.0 ND 2.2
1989 0.014 0.7 ND 0.6 ND 3.0
1990 0.018 0.9 ND 0.7 ND 4.7
1991 0.008 0.5 ND 0.5 ND 2.0
1992 0.012 0.4 ND 0.5 ND 4.4
1993 0.01 0.5 ND 0.4 ND 2.8
1994 0.009 0.5 ND 0.4 ND 2.7
1995 0.007 0.6 ND 0.4 ND 1.9
1996 0.007 0.6 ND 0.4 ND 1.3

Table C-1 Footnotes

Table C-1 Footnote 1

ND = less than the detection limit of 0.005 Bq/L.

Return to Table C-1 footnote 1 referrer

 
Table C-2. Summary of 137Cs and 90Sr measurements in the waters of the Great Lakes from 1973 to 1981 Table C-2 Footnote 1
Year Measurements in the open lakes (mBq/L) Measurements near reactors (mBq/L)
Superior Michigan Huron Erie Ontario Toronto Pickering Ajax
137Cs
1973 2.8 1.8 1.5 0.8 1.8 9.3 11.1 4.8
1974 2.8   1.6     2.2 13.7 4.1
1975     1.6     1.1 3.0 1.1
1976     0.9   0.7 1.9 1.5 3.3
1977     1.4 0.8 0.8      
1978 1.8   1.3 0.7 0.9      
1979 1.7 1.3 1.0 0.6 0.7      
1980 2.0 1.6 1.6 0.6 1.0      
1981 1.7 1.2 1.2 0.6 0.8 1.2   1.4
90Sr
1973 19 31 32 41 47 35 31 34
1974           32 35 57
1975           34 30 35
1976           31 30 30
1977     31 30 35      
1978     37          
1979 19 31 29 31 31      
1980 12 23 25 15 42      
1981 16 17 23 23 25 20   15

Table C-2 Footnotes

Table C-2 Footnote 1

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