Algorithm

n

R2

RMSE (ug/L)

RMSE (%)

p-value

Intercept

Slope

2004

OC3M (All)

26

0.83

0.1

36%

<0.01

1.97

1.28

OC3M (>50 m)

23

0.83

0.07

29%

<0.01

1.75

1.21

Carder (All)

21

0.49

0.05

34%

<0.01

0.46

0.88

Carder (>50 m)

19

0.58

0.05

33%

<0.01

1.72

1.31

GSM (All)

25

0.75

0.04

12%

<0.01

0.24

0.53

GSM (>50 m)

23

0.72

0.04

13%

<0.01

0.20

0.51