Table A3.
Characteristics of the raw water before filtration.
| Parameter | Unit of Measure | Average Value |
|---|---|---|
| pH | - | 7.5 |
| Dissolved oxygen | mg L−1 | 9.5–9.7 |
| Turbidity | NTU | 2–3 |
| Absorbance UV at 254 nm | 1 cm−1 | 0.010–0.020 |
| Suspended solids | mg L−1 | 0–1 |
| Conductivity at 20 °C | µS cm−1 | 260–270 |
| Alkalinity | mg HCO3− L−1 | 120–130 |
| Bacteria colony count at 22 °C | CFU mL−1 | 80–90 |
| Total coliforms at 37 °C | MPN 100 mL−1 | 65–75 |
| Enterococcus | MPN 100 mL−1 | 2–4 |
| Escherichia coli | MPN 100 mL−1 | 8–10 |
| Pseudomonas aeruginosa | CFU 250 mL−1 | 2–4 |
| Clostridium perfringens | CFU 100 mL−1 | 1–3 |
| Cyanobacterial algae | cells L−1 | 1,700,000–2,000,000 |
| Total algae | cells L−1 | 3,500,000–3,600,000 |