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Minimum required separation distances for Concentrated Animal Feeding
Operations (CAFOs) construction
(Constructed on or after March
1st, 2003)
Total
Animal Residence
(in unin-
Type of Structure Unit
Capacity* corporated
areas)
Anaerobic lagoons 500
or less 1,875
feet
& uncovered
501 to 999 1,875
feet
earthen manure
1,000 to 2,999 2,500
feet
storage basins
3,000 or more 3,000
feet
Covered earthen 500
or less 1,250
feet
manure storage 501
to 999 1,250
feet
basins 1,000
to 2,999 1,875
feet
3,000
or more 2,375
feet
Uncovered formed 500
or less None
manure storage 501
to 999
1,250 feet
structure 1,000
to 2,999
1,875 feet
3,000
or more
2,375 feet
Confinement 500
or less None
buildings & covered 501
to 999 1,250
feet
formed manure
1,000 to 2,999 1,875
feet
storage structures 3,000
or more 2,375
feet
Egg washwater 500
or less
None
storage structures 501
to 999 1,000
feet
1,000
to 2,999 1,500
feet
3,000 or more 2,000
feet
*Read below for information
on how to calculate animal unit capacity
Minimum Required Separation Distances
for Land Application of Manure from CAFOs
(For liquid manure from CAFOs
– except for irrigation)
Required Separation Incorporated
within Surface
Applied
Distance From 24
hours or less
Residence, business,
church, school or 0
feet 750
feet
public use area
Sinkhole, abandoned
well, cistern, drinking 0
feet 200
feet
water well, designated
wetland, water source
How to Calculate Animal Unit Capacity
One finishing hog = .4
animal unit
(Example: 2,500-head of finishing hogs x .4 =
1,000 animal units)
One nursery pig = .1 animal unit
One cattle = one animal unit
One dairy cow = 1.4 animal units
One broiler/layer chicken less than three lbs = .0025 animal
unit
One broiler/layer chick 3 lbs or greater = .01 animal unit
This information is compiled from documents provided by the Department
of Natural Resources. If you have any questions or for more information
about any of these rules or regulations contact Iowa Citizens for
Community Improvement at 515-282-0484 or iowacci@iowacci.org.
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