| 91-100 (Excellent) |
Water quality is exceptional, meeting all safety standards for human consumption suggested by various agencies around the world. |
| 61-90 (Good) |
Water quality is good, generally safe for human consumption but may require some treatment to address minor issues. |
| 41-60 (Fair) |
Water quality is fair, can sustain aquatic life and ecosystems but may require significant treatment for human consumption. |
| 11-40 (Poor) |
Water quality is poor, may be suitable for tolerant species but attention needed for sustaining sensitive aquatic life and ecosystems. |
| 0-10 (Very Poor) |
Water quality is very poor, not suitable for aquatic life and ecosystems, but it may be suitable for irrigation. |