CWQGCanadian Water Quality Guidelines
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In some cases health claims were made on labels of brands which exceeded the CWQG. One European mineral water with 570 mg/L TDS, purporting to contain a calcium concentration of 20% of the TDS, claimed to be beneficial as a diuretic and to assist in the elimination of uric acid.
In Manitoba, nitrate may be encountered in waters impacted by intensive livestock production, fertilizer application, or septic effluent, and some private water supplies subject to such contamination can approach or exceed the CWQG (30,31).
Lead levels exceeded the CWQG of 10 [micro]g/L in three of the samples.