35 Ill. Adm. Code 501.230
Animal Unit
Section 501
Section 501.230Â Animal Unit
A unit of measurement for any
animal feeding operation calculated by adding the following animal numbers:
a)Â Â Â Â Â Â Â Â Brood cows and slaughter and feeder cattle multiplied by 1.0
b)Â Â Â Â Â Â Â Â Milking dairy cows multiplied by 1.4
c)Â Â Â Â Â Â Â Â Young dairy stock multiplied by 0.6
d)Â Â Â Â Â Â Â Â Swine weighing over 55 pounds multiplied by 0.4
e)Â Â Â Â Â Â Â Â Swine weighing under 55 pounds multiplied by 0.03
f)Â Â Â Â Â Â Â Â Sheep, lambs or goats multiplied by 0.1
g)Â Â Â Â Â Â Â Â Horses multiplied by 2.0
h)Â Â Â Â Â Â Â Â Turkeys multiplied by 0.02
i)Â Â Â Â Â Â Â Â Â Laying hens or broilers multiplied by 0.01 (if the facility
has continuous overflow watering)
j)Â Â Â Â Â Â Â Â Â Laying hens or broilers multiplied by 0.03 (if the facility
has a liquid manure handling system)
k)Â Â Â Â Â Â Â Â Ducks multiplied by 0.02