Impurity (noun)

1. The state or quality of being impure or contaminated.
2. The presence of foreign or unwanted substances in a material or substance.
3. The quality of being morally or ethically impure.

Origin:

From late latin impuritas, from in- 'not' + puritas 'purity'.

Examples:

1. The impurity of the water made it unsafe to drink.
2. The metal was rejected due to the high levels of impurity.
3. The impurity of the politician's actions led to public outrage.
4. The impurity of the air was causing health problems in the city.
5. The impurity of the motivations was obvious to everyone in the room.