Clean water is tasteless, tasteless, colorless and transparent liquid. But the polluted water often makes people feel abnormal smell.. The main source of water odor is:
(1) the smell of the reproduction and decay of aquatic animals, plants, or microorganisms in the water
(2) the stench of organic matter in the water is decomposed by spoilage.
(3) the smell of dissolved gases such as H2S, SO2 and NH3 in the water
(4) the smell of dissolving salt or mud
(5) the smell of chlorine, etc., in the process of disinfecting the water.
(6) the odor of an industrial waste water that is discharged into the body of a water body, such as oil, phenols, etc..