Environmental Rules in Harrison County, MS (2026)

2 rules for unincorporated Harrison County, Mississippi.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Harrison County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Stormwater Management

Harrison County's Drainage Management Site Plan Ordinance requires engineered stormwater controls for new development in the unincorporated county, capping post-development runoff at the pre-development release rate and routing every plan through the County Engineer before any building permit issues.

Harrison County Stormwater Drainage Management Rule

Some Restrictions

Harrison County Unified Development Code, § 1012.01.01 (as amended through Dec. 12, 2022)

The purpose of this ordinance is to reduce or eliminate the hazards to the public health and safety caused by excessive Stormwater runoff, reduce economic losses to individuals and the community at large, and protect, conserve and promote the orderly development of land and water resources. The provisions of this ordinance further supplement ordinances and regulations as follows: a. Subdivision...

Full ordinance details →Official source ↗

Erosion Control

No building permit or final subdivision plat can be issued in unincorporated Harrison County until the County Engineer approves a Drainage Management Site Plan, a requirement that applies to every new residential, commercial or industrial development and to any grading that disturbs more than one acre.

Harrison County Drainage Site Plan Permit Rule

Some Restrictions

Harrison County Unified Development Code, § 1012.02.01 (as amended through Dec. 12, 2022)

A Drainage Management Site Plan (DMSP) shall be required for any new single-family residential developments and for any new commercial, multi-family residential, institutional, industrial, or utility developments, and shall be required for land disturbing activities greater than one acre. ... No final subdivision plat shall be approved and no building permits shall be issued until and unless a ...

Full ordinance details →Official source ↗

All Harrison County ordinances

See every category we cover for Harrison County: parking, noise, fences, fires, animals, pools, and more.

Harrison County Ordinance Hub →