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verified"},"section":null,"page":null,"quote":null,"note":"douce_long_terme: the summary table prints 'Equation'; the expression is printed on https://ccme.ca/en/chemical/71: The CWQG for copper is related to water hardness (as CaCO3): / When the water hardness is 0 to < 82 mg/L, the CWQG is 2 µg/L / At hardness ≥82 to ≤180 mg/L the CWQG is calculated using this equation (see calculator below) / CWQG (µg/L) = 0.2 * e^{0.8545[ln(hardness)]-1.465} / At hardness >180 mg/L, the CWQG is 4 µg/L / If the hardness is unknown, the CWQG is 2 µg/L / The online calculator (below) will return the correct value over the entire range of hardness.","table":"eau_vie_aquatique","column":"douce_long_terme"}},{"id":"f2bf78e3b9f43c91","parameter":"Copper","value":"2","value_num":2,"unit":"mg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:7440-50-8","place":["CA"],"conditions":["drinking water (a guideline, not a regulation: each province and 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