The odour of water is expressed in terms of threshold number. The maximum threshold number permitted for public supplies is

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• The odour of water is expressed in terms of threshold number. The maximum threshold number permitted for public supplies is
• In case of public supplies, the maximum permissible nitrite content is
• In case of public supplies, the maximum permissible nitrite content is
• The chloride content in the water for public supplies should not exceed
• The permissible hardness of water for public supplies is
• The chloride content in the water for public supplies should not exceed
• The permissible hardness of water for public supplies is
• Odours are generally expressed in terms of
• Turbidity of water is usually measured in terms of
• Turbidity of water is usually measured in terms of