Table 5.
Water quality (mean ± standard deviation) based on monthly evaluation during two months of the low water season (September and October 2020).
| Systems samples (inlet/outlet) | pH (units) | Turbidity (NTU) | Aluminium (mg/L) | Zinc (mg/L) |
|---|---|---|---|---|
| FPK-S2 (inlet) | 6.95 ± 0.12 | 1.75 ± 0.21 | 0.67∗ ± 0.69 | 2.51 ± 0.84 |
| FPK-S2 (outlet) | 6.99 ± 0.05 | 1.10 ± 0.42 | 1.26∗ ± 1.44 | 1.82 ± 0.24 |
| FJT-S1 (inlet) | 6.80 ± 0.27 | 1.20 ± 0.28 | 0.16 ± 0.04 | 2.06 ± 0.44 |
| FJT-S1 (outlet) | 6.81 ± 0.18 | 1.55 ± 0.21 | 0.29∗ ± 0.20 | 2.59 ± 0.86 |
| FT-S4 (inlet) | 7.07 ± 0.13 | 1.35 ± 0.21 | 0.21∗ ± 09 | 3.12∗ ± 2.12 |
| FT-S4 (outlet) | 7.03 ± 0.12 | 1.85 ± 0.07 | 0.24∗ ± 0.13 | 3.30∗ ± 2.31 |
| FI-S3 (inlet) | 7.30 ± 0.08 | 1.90 ± 0.14 | 0.46∗ ± 0.28 | 4.93∗ ± 3.89 |
| FI-S3 (outlet) | 7.29 ± 0.08 | 2.20 ± 0.28 | 0.22∗ ± 0.01 | 4.92∗ ± 3.90 |
| D.S. N° 031-2010-SA | 6.5–8.5 | 5 UNT | 0.2 mg Al/L | 3.0 mg Zn/L |
∗ Noncompliant; nc = not contemplated in the standard.