Limit of hardness in the outlet of waste water

Question

Accepted Answer

The limit of hardness in the outlet of waste water depends on the regulatory standards and the intended use of the water.

The limit of hardness is usually expressed in terms of milligrams per liter (mg/L) of calcium carbonate.
Regulatory standards vary by country and region.
The intended use of the water also affects the limit of hardness. For example, water used for irrigation may have a higher limit than water used for drinking.
The limit of hardness can be controlled through various treatment methods such as ion exchange, reverse osmosis, and lime softening.
Excessive hardness can cause scaling in pipes and equipment, reduce soap effectiveness, and affect the taste of water.

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