Water Salinity

Reference data and engineering information about water salinity for miscellaneous applications.

Overview

Engineering reference data for Water Salinity in miscellaneous.

$y = x \cdot k$

Multiply by conversion factor.

$y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}$

Estimate between two known points.

$p = \frac{\text{part}}{\text{whole}} \times 100\%$

Part as fraction of whole.

The following table shows the typical composition of salts dissolved in sea water.

Water is classified by its dissolved salt concentration (salinity), typically measured in parts per million (ppm) or milligrams per liter (mg/L).

Water Type	Salinity (ppm or mg/L)
Fresh water (typical US city water)	< 100
Water supply typically restricted to	500
Fresh water - US drinking water limit	1,000
Typical limit for agriculture irrigation	2,000
Brackish water, mildly	1,000 - 5,000
Brackish water, moderately	5,000 - 15,000
Brackish water, heavily	15,000 - 35,000
Seawater	30,000 - 50,000 (≈35,000)
Brine	> 50,000
Dead Sea	330,000