Statement – I : The excess of nitrate (NO₃^-) in drinking water (> 50 ppm) can cause methaemoglobinemia (blue baby syndrome)
Statement – II : The excessive sulphate (> 500 ppm) in drinking water causes laxative effect

Consuming too much nitrate can affect how blood carries oxygen and can cause methemoglobinemia (also known as blue baby syndrome). Bottle-fed babies under six months old are at the highest risk of getting methemoglobinemia.

A moderate concentration of sulphate ions in water is harmless but excessive concentration, i.e., greater than 500 𝑝𝑝𝑚 in water causes laxative effects