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
11428 N P ST LA PORTE 77571
Building Size
1,962 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
Very High
Higher pollution than 90% 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)
8.7 million lbs
Extremely High
1333.6x more than typical Houston property
≈ 435 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)
7.05 million lbs
Extremely High
1461.2x 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)
1.65 million lbs
Extremely High
Most Houston properties have none nearby
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)8,701,083 lbs7,046,623 lbs1,654,460 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,783,690 lbs528,791 lbs66,615 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 90% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 10-19th percentile (top 15% most polluted).

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

Methanol, Vinyl acetate, Ethylene, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Propylene

View the full list of 47 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (47 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Methanol67-56-11,878,774 lbs648,774 lbs10,192,473 lbs
2Vinyl acetate108-05-41,379,623 lbs5,684 lbs4,084,849 lbs
3Ethylene74-85-11,516,145 lbs0 lbs1,516,145 lbs
4Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs959,382 lbs959,382 lbs
5Propylene115-07-1942,383 lbs0 lbs942,383 lbs
6Acetaldehyde75-07-0215,200 lbs0 lbs550,235 lbs
7Hydroquinone123-31-90 lbs0 lbs430,145 lbs
8n-Hexane110-54-3361,016 lbs0 lbs361,016 lbs
9Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9216,585 lbs0 lbs216,585 lbs
10Ammonia7664-41-7115,714 lbs10,754 lbs126,468 lbs
11Xylene (mixed isomers)1330-20-754,281 lbs0 lbs68,626 lbs
12Formaldehyde50-00-063,808 lbs0 lbs63,808 lbs
13Certain glycol ethersN23062,831 lbs0 lbs62,831 lbs
14n-Butyl alcohol71-36-348,129 lbs0 lbs48,129 lbs
15Toluene108-88-345,013 lbs3 lbs45,016 lbs
16Methyl iodide74-88-437,993 lbs0 lbs37,993 lbs
17Copper compoundsN1001 lbs84 lbs29,084 lbs
18Sodium nitrite7632-00-00 lbs26,012 lbs26,012 lbs
19Chlorine7782-50-522,258 lbs1,928 lbs24,186 lbs
20Hydrogen fluoride7664-39-319,001 lbs0 lbs19,001 lbs
21Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
22Boron trifluoride7637-07-214,190 lbs0 lbs14,190 lbs
23Dimethylamine124-40-37,035 lbs0 lbs7,035 lbs
24Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
25Methyl methacrylate80-62-65,482 lbs0 lbs5,482 lbs
26Dichloromethane75-09-25,437 lbs0 lbs5,437 lbs
27Acetonitrile75-05-85,326 lbs0 lbs5,326 lbs
28Mercury7439-97-60 lbs0 lbs2,200 lbs
29Methyl acrylate96-33-32,031 lbs0 lbs2,031 lbs
30Di(2-ethylhexyl) phthalate117-81-72,020 lbs0 lbs2,020 lbs
31Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
32Zinc compoundsN9820 lbs1,141 lbs1,141 lbs
33Acrolein107-02-8810 lbs0 lbs810 lbs
34Manganese7439-96-5511 lbs282 lbs793 lbs
35Ethylbenzene100-41-4316 lbs3 lbs319 lbs
36Naphthalene91-20-3245 lbs8 lbs253 lbs
371,3-Butadiene106-99-0242 lbs0 lbs242 lbs
38Hexazinone51235-04-20 lbs212 lbs212 lbs
39Nickel7440-02-00 lbs152 lbs152 lbs
40Chromium7440-47-345 lbs25 lbs70 lbs
41sec-Butyl alcohol78-92-268 lbs0 lbs68 lbs
42Benzene71-43-231 lbs5 lbs36 lbs
43Nickel compoundsN4954 lbs3 lbs8 lbs
44Copper And Copper CompoundsN1000 lbs6 lbs6 lbs
45Nickel And Nickel CompoundsN4952 lbs1 lbs3 lbs
46Lead7439-92-10 lbs1 lbs1 lbs
47Methyl isocyanate624-83-91 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Aluminum oxide (fibrous forms), Ethylene, Maleic anhydride, Vinyl acetate

View the full list of 32 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (32 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-172,331 lbs64,000 lbs1,684,257 lbs
2Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
3Ethylene74-85-1146,385 lbs0 lbs146,385 lbs
4Maleic anhydride108-31-61,569 lbs0 lbs134,889 lbs
5Vinyl acetate108-05-485,022 lbs410 lbs128,367 lbs
6Acetaldehyde75-07-056,670 lbs0 lbs89,250 lbs
7Propylene115-07-188,554 lbs0 lbs88,554 lbs
8Ammonia7664-41-79,091 lbs37 lbs47,520 lbs
9Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-929,545 lbs0 lbs29,545 lbs
10Hydroquinone123-31-90 lbs0 lbs28,819 lbs
11n-Hexane110-54-324,235 lbs0 lbs24,235 lbs
12Acrolein107-02-8209 lbs0 lbs7,515 lbs
13Formaldehyde50-00-03,559 lbs0 lbs5,799 lbs
14Certain glycol ethersN2302,700 lbs0 lbs2,700 lbs
15Chlorine7782-50-52,260 lbs0 lbs2,260 lbs
16Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs2,100 lbs2,100 lbs
17Hydrogen fluoride7664-39-31,738 lbs0 lbs1,738 lbs
18Polycyclic aromatic compoundsN5900 lbs0 lbs1,652 lbs
19Methyl iodide74-88-41,600 lbs0 lbs1,600 lbs
20Boron trifluoride7637-07-21,192 lbs0 lbs1,192 lbs
21Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
22Lead7439-92-10 lbs1 lbs354 lbs
23Ethylbenzene100-41-4316 lbs0 lbs316 lbs
24Naphthalene91-20-3245 lbs6 lbs251 lbs
25Methyl methacrylate80-62-6142 lbs0 lbs142 lbs
26Zinc compoundsN9820 lbs60 lbs60 lbs
271,3-Butadiene106-99-08 lbs0 lbs8 lbs
28Toluene108-88-37 lbs1 lbs8 lbs
29n-Butyl alcohol71-36-37 lbs0 lbs7 lbs
30sec-Butyl alcohol78-92-25 lbs0 lbs5 lbs
31Benzene71-43-25 lbs1 lbs5 lbs
32Ethylene glycol107-21-11 lbs0 lbs1 lbs

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