From: Airborne cow allergen, ammonia and particulate matter at homes vary with distance to industrial scale dairy operations: an exposure assessment
Sample Type
samples (n)
% < LOD
LOD
mean
SD
min
median
max
Bos d 2 μg/m 3
70
16
0.02
0.3
0.4
< 0.02
1.9
NH 3 ppb
79
9
0.9
8.8
10.6
< 0.9
6.0
56.0
TD μg/m 3
75
0
1.1
35.0
54.7
2
22
385