Table 6 Classification of water type and its suitability based on EC and TDS values (N = 72)59.

From: A systematic study on occurrence, risk estimation and health implications of heavy metals in potable water from different sources of Garhwal Himalaya, India

S.N.

Parameter

Measured unit

Classification

Suitability of water

Ground water samples (%)

Source

1

EC

µS cm−1

 < 750

Desirable

100

60

750–1500

Permissible

Nil

1500–3000

Not permissible

Nil

 > 3000

Hazardous

Nil

2

TDS

mg l−1

 < 500

Desirable for drinking

100

61

500–1000

Permissible for drinking

Nil

1000–3000

Useful for irrigation

Nil

 > 3000

Not suitable for drinking and irrigation

Nil