View detailed trend report
Trend:
No evidence of trend

    Oligotriphic: <0.025 mg/L
    Mesotrophic: 0.025-0.075 mg/L
    Eutrophic: >0.075 mg/L

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* ‘Value too low to detect’ refers to a concentration value that is below what the laboratory can measure (the detection limit).
The value of the open circle is not the true concentration of a parameter in the water but half of the lowest concentration that the laboratory can measure.