Rainy Season (October 2020)

Dry Season (March 2021)

Standard Limit

Parameters

Min

Max

Mean

Med

SD

Min

Max

Mean

Med

SD

WHO Standard (2017)

Benin Standard (2001)

${\text{NO}}_3^{-}$ (mg/L)

0

85.35

23.17

10.81

27.47

0

80.58

23.29

8.25

27.10

50

45

${\text{NO}}_2^{-}$ (mg/L)

0.00

8.76

0.39

0.04

1.61

0

31.08

1.46

0.07

5.49

3

3

${\text{NH}}_4^{+}$ (mg/L)

0

0.42

0.06

0.00

0.11

0

5.85

0.51

0.04

1.27

ND

0.9

${\text{PO}}_4^{3-}$ (mg/L)

0

2.12

0.19

0.02

0.45

0

0.07

0.02

0.02

0.02

10

ND