The Cow Emission Factors represent the amount of odor generated by a cow. These factors are assigned by in-field research and comparison of average Cow Weights. To calculate the total odor emission from a dairy facility, the emission factor for each cow type is multiplied by the number of head of cows.
The emission factors and weights for different cow types as used here are:
Cow Type |
Emission Factor (OU/s-number) |
Cow Weights (lbs.) |
Calf |
8 |
250 |
Heifer |
14 |
750 |
Lactating |
25 |
1400 |
Dry Cow |
19 |
1400 |