Environmental Rules in Pima County, AZ (2026)

Pima County Code § 16.48.010

Any new development shall provide some method of peak or volumetric runoff reduction, unless fees in lieu of detention are proposed pursuant to Section 16.48.040 and approved by the chief engineer. The amount of reduction is stipulated within the Storm Water Detention/Retention Manual. The peak runoff reduction should be provided through detention of storm water and storm water harvesting for s...

Pima County Code § 16.36.030(C)

District review and approval are required prior to commencement of any site improvements or grading associated with a subdivision development as a whole or for individual lot(s) within the subdivision. A grading plan must be submitted to the District for review and approval. Detailed improvement plans for storm drains or channel improvements must also be submitted to the District for review and...

Pima County Code § 16.20.010(A)

A floodplain use permit shall be obtained for any new structure, new manufactured home, replacement of an existing manufactured home or travel trailer, a change of use of any portion of an existing structure, substantial improvements or other improvements to a structure or manufactured home where the value of material and labor exceeds seven thousand five hundred dollars, or any other developme...

Pima County Code § 18.39.030(C)(4)(a)

4. Noise: When the large scale retail establishment is adjacent to an existing residential use, the following noise restrictions shall apply: a. Deliveries, loading, idling, or similar operations shall not occur between ten p.m. and six a.m. unless the activity occurs within a loading bay or on the street side of the building; and b. Trash removal or compaction, or similar operations, sha...

Pima County Code § 16.26.030(A), (E)

A. New construction and substantial improvement of any habitable structure, either residential or nonresidential, shall have the lowest floor, including the basement, or in the case of manufactured housing the lowest structural member, elevated at or above the regulatory flood elevation, which is one-foot above the base flood elevation. Certification of elevation shall be required pursuant to S...