Iowa Code Title XI. Natural Resources [Chs. 455-485] § 459.314. Application of manure near designated areas

a. The manure is land-applied by injection or incorporation on the same date as the manure was land-applied.

b. An area of permanent vegetation cover, including filter strips and riparian forest buffers, exists for fifty feet surrounding the designated area other than an unplugged agricultural drainage well or surface intake to an unplugged agricultural drainage well, and the area of permanent vegetation cover is not subject to manure application.

c. The department adopts rules requiring an increased separation distance for the application of manure located in proximity to a high-quality water resource in order to protect the integrity of the high-quality water resource. However, the department shall not provide for an increased separation distance requirement that is more than four times the separation distance requirement otherwise applicable under this section.