Microbial flora

(CFU∙mL⁻¹)

Sampling sites

Dargala

Bogo

Gazawa

Pette

Maroua I

Maroua II

Maroua III

AFNOR standard

Total plate count

(1.39 ± 0.01) 10^7ac

(8.2 ± 0.01) 10^7bc

(3.40 ± 0.00) 10^6c

(6.25 ± 0.07) 10^6ab

(3.39 ± 0.01) 10^6c

(4.10 ± 0.01)10^4a

(1.13 ± 0.01) 10^6b

<10⁶

Total Coliforms

(1.1 ± 0.7) 10^5ac

(1.1 ± 0.7) 10^5ac

(7.6 ± 0.03) 10^4ab

(7.7 ± 0.07) 10^4ab

(3.3 ± 0.03) 10^3b

(4.3 ± 0.6) 10^2a

(1.4 ± 0.00) 10^4c

<10³

Fecal coliforms

(1.7 ± 0.03) 10^2a

(4.1 ± 0.07) 10^2b

(2.3 ± 0.03) 10^2a

(1.6 ± 0.01) 10^2a

ND

ND

ND

<10²

Total fungi

(8.8 ± 0.01) 10^2c

(6.5 ± 0.7) 10^3ac

(1.4 ± 0.10) 10^3ab

(6.1 ± 0.00) 10^2b

(7.9 ± 0.05) 10^2c

(3 ± 0.07) 10^2a

ND

<10⁵

Salmonella/Shigella

ND

ND

ND

ND

ND

ND

ND

0/25 mL