Data-driven insights for local properties

📊 Environmental Assessment Report

This comprehensive report analyzes both flood risk and industrial pollution exposure for this property. The assessment combines multiple data sources including USGS elevation, FEMA flood zones, historical storm modeling, and EPA Toxic Release Inventory records.

🌊 Part 1: Flood Risk Analysis

Property Overview

This section shows the fundamental characteristics of the property, including its elevation above sea level, FEMA flood zone designation, and our calculated overall flood risk rating based on historical data and topographic analysis.

Address
232 N 4TH ST LA PORTE 77571
Building Size
1,514 sqft
Total structure area from HCAD building records.
Elevation
20.43 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very Low
Risk based on FEMA zone and simulation.

Risk Assessment Outputs

These detailed metrics show the technical outputs from our flood risk model. They include predicted water depths at the property during a 5000-year flood event and estimated flood damage based on USACE methodology.

Risk Rating
Very Low
Flood Depth
0 ft ±0.5 ft
No flooding at current water level.
Water Surface Elevation (WSE)
N/A
Water surface elevation data not available.
Area Inundated
N/A
Data not available
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage Estimate (HCAD Valuation)
$0
Property not flooded at current water level. No damage to calculate.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Property not flooded at current water level. No damage to calculate.
Analysis Method
COG Bathtub Model
Raster-based flood inundation query

Flood Simulation

This simulation shows whether the property would flood based on a 5000-year flood event with 3m (9.84ft) water level. Use the interactive tool to explore different scenarios.

✅ Property Would Be Safe
Safety Margin: 10.43 feet
Severity: Safe

Adjust Flood Simulation

The analysis above uses default settings (5000-year flood, 3m/9.84ft water level). To explore different flood scenarios with interactive maps, return to the main tool:

Open Interactive Analysis Tool

Flood Risk Recommendations

Based on the property's flood risk profile, here are specific action items to consider.

  • FEMA Zone X (minimal hazard) - flood insurance available at preferred rates.
  • Review the interactive flood simulator to understand how different rainfall events could affect this property.
  • Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking
Moderate
Higher pollution than 74% of Houston homes
This ranking compares pollution levels within 2 miles of this property against 10,000 randomly sampled Houston metro properties. Lower percentiles indicate higher pollution exposure.
Industrial Pollution Nearby (Last 10 Years)
435 thousand lbs
Very High
66.7x more than typical Houston property
≈ 22 dump trucks of chemicals within 2 miles
Total chemical releases from all industrial facilities within a 2-mile radius over the past decade (2014–2024). Data from EPA's Toxic Release Inventory tracking air, water, and land discharges.
💨 Air Pollution (Last 10 Years)
435 thousand lbs
Very High
90.2x more than typical Houston property
Chemicals released into the air from nearby facilities over 10 years. Includes both fugitive emissions (leaks, evaporation) and stack emissions (smokestacks, vents). May affect local air quality.
💧 Water Pollution (Last 10 Years)
0 lbs
None
Chemical discharges to surface water (bayous, streams, drainage) from industrial facilities within 2 miles over the past decade. May impact local waterways and drainage systems.

❤️ Why It Matters

High chemical activity nearby can indicate industrial zones, truck traffic, or potential odor and noise issues. These factors may affect air quality, long-term property desirability, and neighborhood character. This data helps you understand the industrial footprint around your property.

🏙️ Houston Metro Benchmarks

Comparison with typical Houston properties (based on 10,000 randomly sampled homes). All measurements are for chemicals released within a 2-mile radius.

PeriodTotalAirWater
Typical Houston Property (2014-2024)6,524 lbs4,822 lbs0 lbs
This Property (2014-2024)435,175 lbs435,175 lbs0 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)435,515 lbs49,588 lbs0 lbs

📊 How This Property Compares to Houston Metro

Based on a random sample of 10,000 Houston properties, this chart shows the distribution of pollution levels across the metro area. The highlighted bar indicates where this property falls compared to other homes. Lower percentiles mean higher pollution exposure.

0-9thMost Polluted
9.9%
10-19th
10.1%
20-29th
9.9%
30-39th
10.1%
40-49th
9.7%
50-59th
10.2%
60-69th
6%
70-79th
5.8%
80-89th
4.3%
90-100thLowest Pollution
34.2%
Higher pollution than 74% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile (top 25% most polluted).

Top chemicals released near this property (past 10 years):

Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Ammonia, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen fluoride, Methanol

View the full list of 31 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (31 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9216,585 lbs0 lbs216,585 lbs
2Ammonia7664-41-787,668 lbs0 lbs87,668 lbs
3Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
4Hydrogen fluoride7664-39-317,939 lbs0 lbs17,939 lbs
5Methanol67-56-115,211 lbs0 lbs15,211 lbs
6Chlorine7782-50-510,430 lbs0 lbs10,430 lbs
7Xylene (mixed isomers)1330-20-710,381 lbs0 lbs10,381 lbs
8Ethylene74-85-17,000 lbs0 lbs7,000 lbs
9Propylene115-07-14,500 lbs0 lbs4,500 lbs
10Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
11Acrylic acid79-10-73,532 lbs0 lbs3,532 lbs
12Chlorobenzene108-90-73,127 lbs0 lbs3,127 lbs
13Methyl methacrylate80-62-63,050 lbs0 lbs3,050 lbs
14Phosgene75-44-51,958 lbs0 lbs1,958 lbs
15Acetonitrile75-05-81,765 lbs0 lbs1,765 lbs
16Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
17Methyl tert-butyl ether1634-04-41,591 lbs0 lbs1,591 lbs
18Triethylamine121-44-81,515 lbs0 lbs1,515 lbs
19Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
20Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
21sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
22Ethylene oxide75-21-81,431 lbs0 lbs1,431 lbs
23Toluene108-88-31,261 lbs0 lbs1,261 lbs
24n-Butyl alcohol71-36-31,164 lbs0 lbs1,164 lbs
25N,N-Dimethylformamide68-12-2535 lbs0 lbs535 lbs
26Manganese7439-96-5511 lbs0 lbs511 lbs
27Propylene oxide75-56-9371 lbs0 lbs371 lbs
28Dichloromethane75-09-2251 lbs0 lbs251 lbs
29Chromium7440-47-345 lbs0 lbs45 lbs
30Ethylene glycol107-21-114 lbs0 lbs14 lbs
31Butyl acrylate141-32-25 lbs0 lbs5 lbs

Top chemicals released near this property (2024 only):

Aluminum oxide (fibrous forms), Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Chloroacetic acid, Ammonia, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 21 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (21 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
2Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-929,545 lbs0 lbs29,545 lbs
3Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
4Ammonia7664-41-77,795 lbs0 lbs8,021 lbs
5Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
6Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0900 lbs0 lbs5,055 lbs
7sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
8n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
9Methanol67-56-133 lbs0 lbs1,882 lbs
10Hydrogen fluoride7664-39-31,738 lbs0 lbs1,738 lbs
11Chlorine7782-50-5961 lbs0 lbs961 lbs
12Ethylene74-85-1650 lbs0 lbs650 lbs
13Propylene115-07-1500 lbs0 lbs500 lbs
14Ethylene oxide75-21-8420 lbs0 lbs420 lbs
15Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
16Acrylic acid79-10-7186 lbs0 lbs192 lbs
17Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
18Propylene oxide75-56-960 lbs0 lbs60 lbs
19Phosgene75-44-527 lbs0 lbs27 lbs
20Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
21Ethylene glycol107-21-13 lbs0 lbs9 lbs

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