The phrase "average pollutant levels" is correct and usable in written English.
It can be used when discussing environmental science, air quality, or any context where measuring and comparing the concentration of pollutants is relevant.
Example: "The study revealed that the average pollutant levels in the city have decreased over the past decade."
Alternatives: "mean pollutant concentrations" or "typical pollutant levels".
The increases in admissions in each city were regressed against potential city-level effect modifiers such as average pollutant level, temperature, and percentage of the population ≥ 65 years of age.
We found no consistent evidence of an association between the presence of depressive symptoms and mean pollutant levels averaged over shorter periods preceding assessment (data not shown).
The most frequent type of day (24%% of all days) in our study, MDT [1, 1], reveals that air quality conditions for Atlanta are most often well below average (i.e., the overall mean pollutant levels for Atlanta).
Monthly average air pollutant levels were interpolated from monitors to the ZIP code of maternal residence at childbirth.
For each pollutant, we first modeled personal exposure levels against surrounding greenness using the regionwide average of pollutant levels during the sampling period for each participant as an offset to account for temporal variation in background pollutant levels.
However, the risk factors for which we had no information were likely to vary independently of the average ambient pollutant levels and so should not confound the relationships we observed.
In the year 2004, average air pollutant levels derived from ambient monitoring stations in the Rijnmond region (the larger Rotterdam-area) were 30.7 μg/m3 for PM10, 43.8 μg/m3 for nitrogen dioxide (NO2), and 13.8 μg/m3 for sulfur dioxide (SO2) [ 38].
For each pollutant, we modeled home-indoor levels against the surrounding greenness, smoking, use of gas-cooking appliances, the number of inhabitants at home, the temperature at home-indoor on the first day of sampling round, and the MEDEA index of neighborhood deprivation, while using regionwide average of pollutant levels during the sampling period for each participant as an offset.
