Variable
sulphate_corrected_ug_S_per_m3
sulphate_total_ug_S_per_m3
sodium
sum_nitric_acid_and_nitrate
sulphate_corrected_ug_per_m3
sulphate_total_ug_per_m3
sum_ammonia_and_ammonium
potassium
sulphur_dioxide
calcium
magnesium