Summary of quantitative results
Guidelines for exceedances are based on:
United Kingdom
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Chemistry tests
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The Ching in Waltham Forest
Hatch Roundabout - Upstream has data for current_weather_description, clarity, colour, algae, odour, pollution_sources, on_the_water_s_surface, water_flow, water_level, ammonia, previous_weather, current_weather, phosphates, and previous_weather_description from 21 March 2025 to 10 June 2026.
This data is part of a bigger dataset, Lea Guardians.