"serious contamination" is a correct and usable phrase in written English.
It can be used to describe a situation in which something has been polluted or contaminated in a significant or severe way. Example: The river was closed off due to serious contamination from a nearby factory, rendering the water unsafe for human consumption.
Listeria emerged as a serious contamination problem in meat and poultry products in the 1980s.
A whistleblower who exposed serious contamination problems at GlaxoSmithKline's (GSK) pharmaceutical manufacturing operations has been awarded $96m£60m0m).
It has also consistently played down the likelihood the fire could have caused serious contamination because of the trajectory of the plume of smoke.
When they emerged, serious contamination was shown over a three-year period before, during and after construction of the second phase of Whitelee, which has 215 giant turbines.
The results indicate that the presence of MOBM in cement slurries resulted in a serious contamination (compressive strength and rheological properties decrease, porosity and gas permeability increase).
However, the use of inappropriate irrigation practices could result in a serious contamination risk to plants, soils, and groundwater with sewage water.
However, because of a lack of stringent environmental regulation and worker protection, toxicants in e-waste cause serious contaminations of local air, dust, soil, and water (Ogunseitan et al. 2009; Schmidt 2006; Wong et al. 2007).
The atoll suffered serious radioactive contamination from these tests.
His work brought to light serious PFOA contamination linked to a nearby industrial facility.
Leakage of saline alkaline tank waste solutions often creates a serious environmental contamination problem.
Thus, application of herbicides to the field causes serious water contamination, and can hurt neighboring crops.
