FEMA flood zone rules in Union County, NJ — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Union County municipalities participate in FEMA's NFIP. NJDEP Flood Hazard Area Control Act (N.J.A.C. 7:13) regulates development in flood hazard areas. County manages mosquito control and drainage infrastructure to reduce flood risk.
All 21 municipalities in Union County participate in the NFIP. NJDEP Flood Hazard Area Control Act (N.J.A.C. 7:13) governs development near regulated waters with 50+ acre drainage. Each municipality has its own stormwater management ordinance per NJDEP MS4 permit requirements. The Union County Bureau of Mosquito Control (operational since 1912) inspects, constructs, and maintains drainage ditches to eliminate standing water. The county's Stormwater Pollution Prevention Plan addresses runoff and water quality. Residents can check flood zones via NJFloodMapper.org or FEMA flood maps.
Construction below flood elevation: retroactive compliance required, fines $500 to $5,000. Floodway encroachment: removal order. Failure to maintain flood insurance: lender force-placement at higher cost.
Union County, NJ
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See how Union County's flood zones rules stack up against other locations.
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