"reached a threshold of" is correct and usable in written English.
It can be used to describe when something has reached a certain level or amount. For example, "After only two weeks, the company had already reached a threshold of one million dollars in sales."
They were able to hold out because Argentina's bonds had no "collective-action clause" forcing everyone to participate if it reached a threshold of takers.
Having reached a threshold of welfare, people become increasingly less efficient in transforming resources into happiness (Derclaye [2013]).
They found that when the popcorn reached a threshold of 180C, the outer shell burst open regardless of the size and shape of the grain.
We suspect investigators would have preferred and reported nsSNPs than sSNPs if the nsSNPs had reached a threshold of statistical significance.
Regions of interest (ROI) for encoding phase and response phase were created by combining neighboring voxels that reached a threshold of t>3.71 (p<0.0001 uncorrected) in the group map of the NT1, at shift 2 and at shift 11 (corresponding to the fMRI signal at 4000ms after PS presentation).
As soon as the signal intensity in ROI reached a threshold of 100 HU, data acquisition was started.
Osborne wants to reach a threshold of £50,000 by 2020.
Parliament must consider all petitions that reach a threshold of 100,000 votes.
For years, one of the shibboleths of Chinese domestic politics was that you could reach a threshold of prominence that would make you untouchable.
The suit challenges a law that any party whose candidate for governor fails to reach a threshold of 50,000 votes can no longer have registered members.
There is some evidence to suggest public and household debt undermines economic growth once it reaches a threshold of 85%, and 90% for the non-financial business sector.
