The phrase "a level of one" is correct and usable in written English.
It can be used in contexts where you are discussing a specific degree, standard, or measurement, often in a comparative or evaluative sense.
Example: "In this assessment, we have determined that the project meets a level of one in terms of quality and execution."
Alternatives: "a standard of one" or "a degree of one".
Then we assigned a level of one to four based on the quartile (low high) and summed across the compounds included in each group to obtain an overall score for that chemical group, for each census tract.
The long-term effects on humans were uncertain, but the U.S. Centers for Disease Control calculated that the material was safe to consume below a level of one part per million.
To consume one gram of fluoride by drinking water that has been fluoridated to a level of one part per million, a person would have to drink more than 260 gallons.
In 1944, The Times reported that the New York State Department of Health would undertake an experiment by fluoridating the city water supply in Newburgh to a level of one part per million and comparing its dental health with that of Kingston, where the water would remain fluoride-free.
The LDR/hybridization flow-through biochip performed the entire assay at a relatively fast processing speed: 6.5 min for on-chip LDR, 10 min for washing, and 2.6 min for fluorescence scanning (total processing time = 19.1 min) and could screen multiple mutations simultaneously for high throughput applications at a level of one mutant sequence in 100 wild-type sequences.
In nature, one uranium atom in 140 is uranium 235, but most reactors require a level of one in 33 to one in 20.
Each of the nutritionists is credentialed, and all have to demonstrate a level of one-on-one success working with their own clients before joining.
Republican leaders say that shift — to a level of one-party control that some historians said the Republicans have not seen since the 1920s — will finally end gridlock in now-divided Washington.
"This is a level of maturity one rarely sees," said Mr. Lessa, as he watched him work the cavernous room.
These are extraordinary numbers, at a level of impact one rarely sees in a social-science experiment.
This dilemma contributes to Lewis' seemingly ever-growing list of problems, which have a pattern of lacking a level of candidness one would expect from a chief executive.
