"very low levels" is a correct and usable phrase in written English.
An example sentence could be: "The quality of air within the city has reached very low levels in recent years."
CRONies have very low levels of inflammation.
However, these strains produce very low levels of ethanol.
Percentage gains from very low levels can be deceptive, however.
For the most part, the rebound in technology stocks was from very low levels.
While many of the economic indicators are indeed strengthening, they are improving from very low levels.
"It points to the need to operate at very low levels of unemployment".
Nuclear Regulatory Commission officials said there were very low levels of tritium in the water.
"There were very low levels of aspiration and I found that frustrating".
Keeping interest rates at very low levels for an extended period is essential, but not sufficient.
Many investors believed that stock prices had simply fallen to very low levels.
"The good news is that we are dealing with very low levels of asbestos.
