Table 2.
Average physico-chemical characteristics of samples from assessed stations
| Samples | Temperature (°C) | pH | Conductivity (μS/cm) | Dissolved oxygen (mg/L) | Salinity (ppt) | Total dissolved solid (mg/L) | Turbidity (NTU) | Rainfall volume (mm/month) | Nitrate (mg/L) | Nitrite (mg/L) | Ammonia (mg/L) | Chlorine (mg/L) | Fluoride (mg/L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Recreational water | |||||||||||||
|
River 1 |
28.8 |
6.67 |
0.372 |
0.46* |
0.17 |
0.242 |
10.1 |
292 |
0.05 |
0.057 |
0.56* |
0.24 |
0 |
|
River 2 |
28.8 |
6.88 |
0.237 |
0.20* |
0.11 |
0.154 |
13.6 |
227 |
0.97 |
0.197 |
0.73* |
0.18 |
0.05 |
|
River 3 |
26.3 |
7.13 |
0.378 |
1.63* |
0.18 |
0.245 |
6.9 |
249 |
0.49 |
0.937 |
0.73* |
0.08 |
0.20 |
|
River 4 |
28.3 |
7.11 |
0.896 |
0.58* |
0.44 |
0.582 |
10.0 |
239 |
0.06 |
0.086 |
0.73* |
0.21 |
0.33 |
|
Swimming pool 1 |
28.8 |
6.98 |
0.622 |
0.78* |
0.30 |
0.404 |
0.9 |
227 |
0.07 |
0 |
0.09* |
2.20 |
0 |
|
Swimming pool 2 |
26.1 |
6.88 |
1.148 |
0.24* |
0.57 |
0.746 |
0.5 |
227 |
0.08 |
0.018 |
0.10* |
1.14 |
1.88* |
|
Swimming pool 3 |
29.0 |
6.82 |
0.913 |
0.22* |
0.45 |
0.594 |
0.5 |
249 |
0.55 |
0.012 |
0.08* |
0.02 |
0.49 |
|
Pond 1 |
31.1* |
6.89 |
0.139 |
0.45* |
0.06 |
0.091 |
16.2 |
292 |
0.05 |
0.08 |
0.15* |
0.77 |
0 |
|
Pond 2 |
29.0 |
6.86 |
0.334 |
0.12* |
0.45 |
0.214 |
19.1 |
249 |
0.19 |
0.275 |
0.73* |
1.25 |
0.64 |
|
Natural lake |
28.9 |
7.33 |
1.380 |
2.19* |
0.69 |
0.898 |
4.8 |
252 |
0.001 |
0.0052 |
0.078* |
0.008 |
0.098 |
|
Rain tank |
24.4 |
6.79 |
0.062 |
0.11* |
1.40 |
0.040 |
3.1 |
249 |
0.07 |
0.01 |
0.10* |
0.06 |
0.68 |
|
Drinking water | |||||||||||||
|
Tap 1 |
27.70 |
6.98 |
0.384 |
0.55* |
0.18 |
0.249 |
0.51 |
NA |
0.01 |
0.001 |
0.52* |
0.04 |
0 |
|
Tap 2 |
28.73 |
6.99 |
0.123 |
0.60* |
0.06 |
0.080 |
1.80 |
NA |
0.03 |
0 |
0.09* |
0.31 |
0.14 |
|
Tap 3 |
27.80 |
7.15 |
0.345 |
0.57* |
0.18 |
0.223 |
0.19 |
NA |
0.02 |
0.011 |
0 |
0.27 |
0 |
|
Dispenser 1 |
22.91* |
6.84 |
0.121 |
0.28* |
0.08 |
0.076 |
2.80 |
NA |
0.02 |
0.011 |
0.09* |
0.46 |
0 |
|
Dispenser 2 |
26.50 |
7.28 |
0.341 |
3.04* |
0.16 |
0.221 |
0.25 |
NA |
0.01 |
0 |
0 |
0.23 |
0 |
|
Spring |
26.10 |
7.11 |
0.216 |
0.58* |
0.44 |
0.582 |
9.99 |
240 |
0.10 |
0 |
0.10* |
0 |
0.26 |
|
Tap tank |
26.60 |
7.14 |
0.122 |
1.03* |
0.06 |
0.079 |
2.66 |
NA |
0.10 |
0.011 |
0.10* |
0.22 |
0.07 |
|
Well |
29.70 |
7.30 |
0.635 |
3.18* |
0.31 |
0.413 |
0.72 |
252 |
0.09 |
0.05 |
0.09* |
0 |
0.05 |
| Mineral | 26.70 | 7.11 | 0.504 | 0.45* | 0.24 | 0.328 | 0.08 | NA | 0.08 | 0 | 0.08* | 0 | 0 |
NA = Not Applicable.
* = against the DENR regulation.