Summary of quantitative results
Guidelines for exceedances are based on:
United States
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Chemistry tests
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Richland Creek in Illinois
Richland Creek @ Centennial Park has data for ph, chloride, conductivity, air_temperature, water_temperature, Ice on, current_weather, previous_weather, previous_weather_description, and current_weather_description from 7 November 2022 to 14 April 2025.