It senses when water pressure inside the tank is rising to unsafe levels.

Those that are caught have unsafe levels of contaminants.

A company he hired to run tests found unsafe levels of asbestos in his apartment.

With Mercury liquid already hot the vapors in the room would quickly reach a high unsafe level.

It remains closed due to unsafe levels of landfill gas.

For example, increasing ozone concentrations to unsafe levels can increase the risk of asthma attacks.

As a consequence, its full benefits will not be obtained, and homocysteine may increase to unsafe levels.

Town officials tell us only after we reach that unsafe level will they consider stringent measures.

One in four children has been exposed to unsafe levels of lead.

If this occurs, the face velocity could drop to an unsafe level.