5 county-level rules, plus city-specific rules for 1 city in Washington County, Arkansas.
Verified from official government sources
Any construction disturbing one acre or more in Washington County needs coverage under Arkansas DEQ's construction general permit (ARR150000) plus a SWPPP. Fayetteville and Springdale add local MS4 drainage review.
Arkansas DEQ Construction Stormwater General Permit No. ARR150000
Small Site (AUTOMATIC COVERAGE for 1 Acre or More but Less than 5 Acres)
Construction sites in Washington County must control erosion and sediment under Arkansas DEQ permit ARR150000 once one acre is disturbed. Silt fence, wattles, and stabilized entrances are standard; cities inspect grading.
Arkansas DEQ Construction Stormwater General Permit No. ARR150000
Small Site (AUTOMATIC COVERAGE for 1 Acre or More but Less than 5 Acres)
Washington County is landlocked, so there are no coastal or tidal rules. The equivalent is streamside protection: Fayetteville's UDC Chapter 168 requires a 50-foot vegetated buffer along streams draining 100 acres or more.
Washington County and its cities enforce FEMA floodplain standards under the NFIP. New buildings in the Special Flood Hazard Area along the White and Illinois River systems must be elevated above base flood elevation.
Fayetteville and Springdale require grading permits for significant earthwork, and drainage cannot be redirected onto a neighbor's property. Retaining walls over four feet need engineered plans and a separate permit.
1 cities in Washington County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
See every category we cover for Washington County — parking, noise, fences, fires, animals, pools, and more.
Washington County Ordinance Hub →