Free Access
Table 1
Water quality classes and ranges of the parameters.
| Water quality parameters | Class I High water quality |
Class II Good water quality |
Class III Moderate water quality |
Class IV Poor water quality |
References |
|---|---|---|---|---|---|
| Temperature (°C) | ≤25 | ≤25 | ≤30 | >30 | TSWQR (2015) |
| pH | 6.5–8.5 | 6.5–8.5 | 6.0–9.0 | <6.0 or >9.0 | TSWQR (2015) |
| Electrical conductivity (μS/cm) | <400 | 1000 | 3000 | >3000 | TSWQR (2015) |
| Dissolved oxygen (mg/l) | >8 | 6 | 3 | <3 | TSWQR (2015) |
| NH4–N (mg/l) | <0.2 | 1 | 2 | >2 | TSWQR (2015) |
| NO3–N (mg/l) | <5 | 10 | 20 | >20 | TSWQR (2015) |
| NO2–N (mg/l) | <0.01 | 0.06 | 0.12 | >0.3 | TSWQR (2015) |
| PO4–P (mg/l) | <0.06 | 0.19 | 1 | >1.00 | KLEE (1991) |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.