"excessively high levels" is correct and usable in written English.
You can use it in any context that requires a comparison of two different levels in which one is too high. Example: "The testing results indicated excessively high levels of toxic chemicals in the sample."
The issue is there are many out there partaking in these programs at excessively high levels, excessive speed of movement and volume that simply should not be and I want to people to be able to make an informed decision.
The researchers believe selenium can turn toxic when present in the body at excessively high levels.
Examples in the further education sector could include setting fees at excessively high levels or significantly below costs to drive out new providers.
The company sued, contending that the government lacked authority to enforce its new regulations, which use excessively high levels of salmonella as an indicator of an unsanitary plant.
As the Howard League's evidence is that abuse and excessively high levels of reoffending have been a problem since the opening of Medway in April 1998 (two months after which there was a riot), I suggest it could be millions that should be repaid.
If the European Central Bank were to gain this power, it could shut down insolvent (zombie) banks, limit excessively high levels of central-bank credit, and make it clear to the euro zone's members that help from Frankfurt cannot go on forever.
The main abnormality in diabetes is an excessively high level of blood sugar, or glucose.
In this case, an excessively high level of activity is considered to be a sign of abnormal behaviour.
DA neurons in the SN are known to be uniquely vulnerable to oxidative insults (Jenner and Olanow 1998), and they encounter an excessively high level of oxidative stress during brain inflammation because of the high density of microglia in this region (Kim et al. 2000).
Likewise, in caudal shell, GABA and glutamate signals may normally function to adaptively make threat-related stimuli frightening in appropriate situations, but at excessively higher levels contribute to levels of pathological paranoia in schizophrenia and related disorders [61], [62], [63], [64], [65], [66].
At normal intensity levels, such amino acid neurotransmitter signals may act on valence-coded locations in rostral medial shell to help give healthy attractiveness to rewards and zest to life, whereas at excessively higher levels may contribute to compulsive drug addiction and related compulsive pursuits [56], [60].
