PARAMETERS/Stations

FUTO STATION

UMUAGWO STATION

EZIOBODO STATION

EGBU STATION

WHO/FME STANDARD (mg/L) 2003

Temperature (˚C)

30.50 ± 2.646^a

24.25 ± 2.217^b

29.25 ± 2.217^a

25.75 ± 3.775^a

20 - 30

pH

6.75 ± 0.646^a

7.10 ± 0.141^a

7.18 ± 0.171^a

7.0 ± 0.365^a

6.5 - 8.5

CO₂ (mg/L)

3.43 ± 0.568^a

3.65 ± 0.342^a

2.25 ± 0.30^b

4.3 ± 0.258^b

-

Nitrate (mg/L)

0.10 ± 0.071^a

0.07 ± 0.021^b

0.09 ± 0.018^a

0.18 ± 0.096^a

0.50

Total Hardness (mg/L)

34.25 ± 2.568^a

42.65 ± 1.746^b

29.08 ± 2.442^b

36.4 ± 1.811^a

150

Ammonia (mg/L)

0.975 ± 0.171^a

1.40 ± 0.183^b

1.93 ± 0.222^b

1.13 ± 0.299^a

<0.4

Dissolved Oxygen (mg/L)

4.25 ± 0.646^a

4.53 ± 0.538^a

6.23 ± 0.532^b

3.45 ± 0.30^a

˃4.0

Biochemical Oxygen Demand (mg/L)

4.478 ± 0.374^a

2.96 ± 0.162^a

4.945 ± 0.108^a

6.14 ± 0.235^a

40

Chemical Oxygen Demand (mg/L)

30.99 ± 0.337^a

40.76 ± 0.577^a

20.81 ± 0.565^a

19.98 ± 0.473^a

40

Chloride (mg/L)

1.70 ± 0.279^a

4.68 ± 0.300^b

2.20 ± 0.78^a

4.79 ± 0.222^b

250

Nickel (mg/L)

4.21 ± 0.832^a

3.40 ± 1.39^b

2.16 ± 0.840^b

3.99 ± 0.176^a

0.02

Lead (mg/L)

6.02 ± 1.48^a

0.71 ± 0.233^b

3.61 ± 0.736^b

0.997 ± 0.568^b

0.01

Chromium (mg/L)

1.63 ± 0.685^a

2.43 ± 0.596^a

5.78 ± 1.171^b

11.07 ± 0.441^b

0.05

Cadmium (mg/L)

3.61 ± 1.00^a

3.13 ± 0.978^a

0.74 ± 0.213^b

1.01 ± 0.71^b

0.003

Copper (mg/L)

10.36 ± 2.25^a

6.79 ± 1.154^b

1.25 ± 0.983^b

0.94 ± 0.329^b

2.00