Sampling site

Microorganism concentration

Maximum

Minimum

Avg ± SD

Secondary effluent

Giardia/10L

299

180.5

213.8 ± 44.0

Cryptosporidium/10L

13

2

6.9 ± 4.0

Fecal coliform (cfu/100mL)

5.8 × 10⁵

4.7 × 10⁴

1.8 × 10⁵ ± 5.4 × 10⁴

Tertiary effluent (UV)

Giardia/10L

85.8

7.2

45.7 ± 29.3

Cryptosporidium/10L

5.6

0.2

1.2 ± 0.2

Fecal coliform (cfu/100mL)

1.8 × 10⁴

40

4 × 10³ ± 6.5 × 10³

Tertiary effluent (Chlorine)

Giardia/10L

2.4

0.2

1.2 ± 0.7

Cryptosporidium/10L

9.2

0.0

2.5 ± 0.4

Fecal coliform (cfu/100mL)

5.7 × 10²

0.0

52 ± 133