Parameter | Rate of hazard | Water class | Pre-monsoon | Monsoon | Post-monsoon | |||
High Tide | Low Tide | High Tide | Low Tide | High Tide | Low Tide | |||
pHa | 6.5 - 8.4 | No problem | All | All | All | All | All |
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5.1 - 6.4 and 8.5 - 9.5 | Moderate |
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0 - 5.0 and 9.5 | Severe |
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EC (µS/cm) | <250 | Excellent |
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| S1HT-S4HT, S6HT | S1LT-S7LT | S1HT-S8HT | S1LT-S8LT |
250 - 750 | Good |
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| S5HT, S7HT, S8HT | S8LT, S9LT | S9HT-S11HT | S9LT-S11LT | |
750 - 2000 | Permissible |
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| S9HT-S11HT | S10LT, S11LT |
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2000 - 3000 | Doubtful |
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>3000 | Unsuitable | All | All |
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TDSa (mg/L) | <450 | Good |
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| S1HT-S9HT | S1LT-S9LT | S1HT-S8HT | S1LT-S9LT |
450 - 2000 | Permissible |
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| S10HT-S11HT | S10LT-S11LT | S9HT-S11HT | S10LT, S11LT | |
>2000 | Unsuitable | All | All |
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Cl-a (meq/L) | <4 | No problem |
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| S1HT-S8HT | S1LT-S8LT | S1HT-S8HT | S1LT-S9LT |
4 - 10 | Moderate |
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| S9HT-S11HT | S9LT-S11LT | S9HT-S11HT | S10LT-S11LT | |
>10 | Severe | All | All |
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Na+ a (meq/L) | <3 | No problem |
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| S1HT-S8HT | S1LT-S8LT | S1HT-S7HT | S1LT-S7LT |
3 - 9 | Moderate |
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| S9HT-S10HT | S9LT | S8HT | S8LT-S9LT | |
>9 | Severe | All | All | S11HT | S10LT-S11LT | S9HT-S11HT | S10LT -S11LT | |
NO3-Na (mg/L) | <5 | No problem | S9HT-S10HT | S8LT-S11LT | S1HT | S2LT-S4LT, S6LT, S11LT | All | All |
5 - 30 | Moderate | S1HT-S8HT, S11HT | S1HT-S7HT | S2HT-S11HT | S1LT, S5LT, S7L-S10LT |
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>30 | Severe |
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Na%c | <20 | Excellent |
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20 - 40 | Good |
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| S1HT-S8HT | S1L-S8LT | S1HT-S7HT | S1L-S7LT | |
40 - 60 | Permissible |
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| S9HT-S11HT | S9L-S11LT | S8HT-S11HT | S8L-S11LT | |
60 - 80 | Doubtful |
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>80 | Unsuitable | All | All |
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SARd | <10 | Excellent |
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| All | All | All | All |
10 - 18 | Good |
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18 - 26 | Doubtful |
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>26 | Unsuitable | All | All |
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RSCe | <1.25 | Safe | All | All | All | All | All | All |
1.25 - 2.50 | Permissible |
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>2.50 | Unsuitable |
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