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	ND^{Table 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)
Year	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 textfortable1footnote1 Return to Table C-2 footnote 1 referrer