Malaysia has periodic problems with air quality reaching hazardous levels because of smoke haze.

But this combination can lower blood pressure to hazardous levels, and some men have died from it.

About 30 million Americans face hazardous levels of noise at work.

Air, water, and land pollution reached hazardous levels as legislators turned a blind eye.

Pollutants found at hazardous level in the creek have included copper, ammonia, and zinc.

The grapefruit juice-drug interaction can lead to unpredictable and hazardous levels of certain important drugs.

These continue to turn up, at detectable and sometimes hazardous levels, in some Great Lakes sports fish.

An environmental evaluation of the site in the 1990s showed that the degree of contamination was at a hazardous level.

Rappelling to the floor takes about twenty minutes, in which time abseil equipment and rope can heat up to hazardous levels.

They spent the pause in the highest and least hazardous level of the forest.