Hydrogen sulfide (HS) is a common contaminant, which must be removed prior to most uses.

It is a common contaminant in blood and cerebrospinal fluid cultures.

The seeds are also a common contaminant in crop and forage seeds.

The most common and dangerous contaminants in water are salt, chlorine and sewage.

Seven of the most common contaminants are:

In fact, the most common contaminant of stored blood is Y. enterocolitica.

Radon has come under scrutiny because of the discovery that it is a common contaminant of the air in homes and factories.

Today, carbon tetrachloride is a common contaminant in groundwater and soils.

It is an agricultural herbicide associated with cancer even at low levels and is a very common contaminant of drinking water.