Summary of quantitative results
Guidelines for exceedances are based on:
United Kingdom
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Chemistry tests
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Pymmes Brook in Barnet
Waterfall Walk 2 (Downstream) has data for clarity, colour, pollution_sources, odour, previous_weather, current_weather, oxygen, ammonia, phosphates, turbidity, water_temperature, conductivity, water_level, water_flow, on_the_water_s_surface, and algae from 1 May 2023 to 23 October 2025.