The phrase "below the acceptable level" is correct and usable in written English.
It can be used to describe a situation where something does not meet a specified standard or threshold.
Example: "The test results indicated that the pollutant levels were below the acceptable level, raising concerns about environmental safety."
Alternatives: "under the acceptable threshold" or "not meeting the acceptable standard."
Higher addition levels diminished the elastic modulus and bending strength below the acceptable level.
That is, the system will request to recreate a watermarked image if the image quality is below the acceptable level.
The SIRs for the FH system of them are all below the acceptable level, namely 1 dB.
The free cyanide levels of the control dam water samples were averagely greater compared to the borehole control samples and fall below the acceptable level.
In terms of the test-retest correlation, the average item-item correlation of CaSUN by Kappa coefficient was 0.13, below the acceptable level of correlation.
The only element whose CVI value felt below the acceptable level was the response format (I-CVI = 0.7), which was considered to be vague.
The optimum safe design intensity (ground motion) should be optimal in economic senses and also assure seismic mortality below the acceptable levels.
SO2 levels were above the acceptable level every year from 1968 to 1974 and then decreased to below 40 parts per billion (ppb), which is the acceptable level defined by the Air Pollution Control Law.
All SBS values were adequate, since none were below the minimum acceptable level (6 8 MPa), however the enamel did not return to the conditions present prior to the bonding of the brackets.
The Academic self-perception and Social self-perception subscales were below the minimum acceptable level of 0.70, whilst for the other three subscales (Perception of Teaching, Perception of Learning, Perception of Atmosphere) the internal consistency was acceptable.
This led to the continuous drop in the condition level, which ultimately fell below the minimum acceptable level in year 2007.
