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Table 4 Total phosphorus (TP) concentrations for a given likelihood (quantile) of being below low and medium risk World Health Organisation (WHO 1999) threshold levels for cyanobacteria volume

From: Evaluation of indicators for cyanobacterial risk in 108 temperate lakes using 23 years of environmental monitoring data

Quantile

50th

60th

70th

80th

90th

95th

98th

%Exceeded

50%

40%

30%

20%

10%

5%

2%

Drinking water alert 1 0.2 mm3 L−1

TP μgL−1

35.34

30.31

23.90

19.39

13.42

10.25

5.87

Low health risk 2 mm3 L−1

TP μgL−1

57.88

56.15

53.58

48.69

35.44

27.84

19.33

Drinking water alert 2/Medium health risk 10 mm3 L−1

TP μgL−1

   

117.30

72.15

56.11

43.99

  1. TP concentrations are obtained from the fitted quantile regression models