Summary of quantitative results
Guidelines for exceedances are based on:
Canada
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Chemistry tests
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Welland Canal in Ontario
Port Colborne at the entrance from Lake Erie has data for current_weather, ph, oxygen, chlorine, hardness, alkalinity, conductivity, air_temperature, water_temperature, previous_weather, Ice on, current_weather_description, previous_weather_description, chloride, algae, clarity, pollution_signs, water_flow, water_use, water_level, colour, on_the_water_s_surface, and odour from 29 October 2024 to 8 July 2025.