20230419 09302100 1.0 TRUE TRUE Acute_lethality This map presents the wastewater systems in Canada that conducted at least one acute lethality test in recent years. It indicates the percentage of acute lethality test failures for each system according to the standards of the Wastewater Systems Effluent Regulations (WSER). Note: Results from Quebec municipalities are not available starting in 2018 inclusively since an equivalency agreement is now in effect. WSER Wastewater Systems Effluent Regulations acute lethality Acute lethality test results from systems subject to the Wastewater Systems Effluent Regulations. 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