== Water classification ==Water can be classified by the amount of TDS per liter:*Fresh water < 1000 mg/L TDS*Brackish water 1000 to 10,000 mg/L TDS*Saline water 10,000 to 30,000 mg/L TDS*Brine > 30,000 mg/L TDSWhile a TDS of 5,000 mg/L is the minimum threshold for a water to be considered brine, the typical range is 30,000 to 100,000 mg/L.
In base al suo valore si distinguono:* acque meteoriche: compreso tra 10 e 80 mg/L* acque oligominerali: compreso tra 80 e 200 mg/L* acque mediominerali: compreso tra 200 e 1.000 mg/L* acque minerali: superiore a 1.000 mg/L* acque salate: superiore a 30.000 mg/L.