Environmental Rules in Brown County, WI (2026)

Brown County Code § 40.12(3)(a)1

TOTAL SUSPENDED SOLIDS. BMPs shall be designed, installed and maintained to control total suspended solids carried in runoff from the post-construction site as follows. The total suspended solids reduction shall be based on the average annual rainfall, as compared to no runoff management controls. 1. For post-construction sites with 20,000 square feet or more of imperv...

Brown County Code § 40.08(1)-(2)

PERMIT REQUIRED. No responsible party may commence a land disturbing construction activity subject to this ordinance without receiving prior approval of an erosion and sediment control plan for the site and a permit from the County Highway Commissioner. (2) PERMIT APPLICATION AND FEES. At least one responsible party desiring to undertake a land disturbing construction activity ...

Brown County Code of Ordinances, ch. 23.05 (Floodplains - Areas to be Regulated)

23.05 AREAS TO BE REGULATED. (1) This ordinance regulates all areas of special flood hazard identified as zones A, AO, AH, A1-30, AE, VE, V1-30, or V on the Flood Insurance Rate Map (FIRM). Additional areas identified on maps approved by the Department of Natural Resources (DNR) and unincorporated areas of Brown County may also be regulated under the provisions of this ordinance, where applicab...

Brown County Code § 23.05(2)

Any structures intended for human habitation adjacent to a floodplain that the Zoning Administrator deems susceptible to flooding must have the lowest opening a minimum of two feet above the area of special flood hazard, regional or base flood elevation. A shoreland permit will be required. If elevations do not exist, it may be required to complete a case by case flood study or to record an...