News & Events

Hurricane Zeta Rainfall and Storm Surge has impacts in Louisiana, Mississippi, Alabama, and Florida

October 28 2020

Envirosite Provides Environmental Data
to Aid in Hurricane Zeta Cleanup Efforts.



Hurricane Zeta made landfall on October 28, 2020 at 4 pm CDT near Cocodrie, Louisiana, as a Category 2 hurricane with winds raging at 110 mph, only one mph shy of a Category 3 hurricane. In addition to high winds, the storm produced over 4 inches of rain in some areas of Louisiana, Mississippi, Alabama, and Florida. This was the fourth hurricane to hit Louisiana this year. The storm has left millions of homes and businesses without power in the affected areas. We combined the National Hurricane Center's Storm Surge data with Envirosite's extensive environmental and geospatial data sets to help aid public officials and environmental professionals.

Envirosite's Storm Surge impact analysis indicates the highest number of contaminated sites at risk of flooding in these four states:

  • Louisiana: Lafourche, Terrebonne, and Plaquemines Counties
  • Mississippi: Harrison and Jackson Counties.
  • Alabama: Mobile County.
  • Florida: Escambia and Santa Rosa Counties.

Figure 1: Map showing Contaminated Sites for the Hurricane Zeta inundation areas


Figure 2: Map showing Potentially Contaminated Sites for the Hurricane Zeta inundation areas


The data for the affected area includes Louisiana, Mississippi, Alabama, and Florida. The Envirosite contaminated and regulated sites data related to Hurricane Zeta can be downloaded here.

Hurricane Zeta Sites

  Louisiana Mississippi Alabama Florida
State Totals 5081 809 1155 549
CONTAMINATED SITES 4157 406 739 367
    Superfund NPL, NPL-Related 80 45 44 0
    State Hazardous Waste sites 42 184 12 66
    Brownfields  13 23 4 1
    Spills, Other contaminated sites 4022 154 679 300
    RCRA Regulated sites 401 74 129 14
    Above Ground Storage Tanks (bulk storage)    19 2 95 34
    Gas Stations and Underground Storage Tanks 492 321 152 57
    Other potentially contaminated sites 12 6  40  77

Hurricane Zeta Inundation 

Here is the legend for the NHC Potential Storm Surge Flooding Map
1 = 0 to 1 foot above ground
2 = Greater than 1 foot above ground
3 = Greater than 3 feet above ground
4 = Greater than 6 feet above ground
5 = Greater than 9 feet above ground

Questions may be directed to Niem Tash, Data Initiatives Manager at