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
11811 N L ST LA PORTE 77571
Building Size
1,887 sqft
Total structure area from HCAD building records.
Elevation
19.57 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: 9.57 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
High
Higher pollution than 88% 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)
4.9 million lbs
Extremely High
750.4x more than typical Houston property
≈ 245 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)
3.72 million lbs
Extremely High
772.3x 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)
1.17 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)4,895,549 lbs3,724,167 lbs1,171,382 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,412,371 lbs235,321 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 88% 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, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Acetaldehyde

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)
1Methanol67-56-11,720,273 lbs228,964 lbs9,614,162 lbs
2Vinyl acetate108-05-4391,623 lbs0 lbs3,091,165 lbs
3Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs911,682 lbs911,682 lbs
4Ethylene74-85-1792,020 lbs0 lbs792,020 lbs
5Acetaldehyde75-07-0193,009 lbs0 lbs528,044 lbs
6Hydroquinone123-31-90 lbs0 lbs430,145 lbs
7Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9216,585 lbs0 lbs216,585 lbs
8Xylene (mixed isomers)1330-20-754,281 lbs0 lbs68,626 lbs
9Formaldehyde50-00-063,808 lbs0 lbs63,808 lbs
10n-Butyl alcohol71-36-349,265 lbs0 lbs49,265 lbs
11Toluene108-88-345,000 lbs0 lbs45,000 lbs
12Propylene115-07-140,698 lbs0 lbs40,698 lbs
13Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
14Copper compoundsN1001 lbs84 lbs29,084 lbs
15Sodium nitrite7632-00-00 lbs26,012 lbs26,012 lbs
16n-Hexane110-54-320,824 lbs0 lbs20,824 lbs
17Chlorine7782-50-519,583 lbs605 lbs20,188 lbs
18Hydrogen fluoride7664-39-319,001 lbs0 lbs19,001 lbs
19Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
20Dimethylamine124-40-37,035 lbs0 lbs7,035 lbs
21Ammonia7664-41-73,140 lbs3,199 lbs6,339 lbs
22Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
23Methyl methacrylate80-62-65,482 lbs0 lbs5,482 lbs
24Dichloromethane75-09-25,437 lbs0 lbs5,437 lbs
25Acetonitrile75-05-85,326 lbs0 lbs5,326 lbs
26Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
27Mercury7439-97-60 lbs0 lbs2,200 lbs
28Methyl acrylate96-33-32,031 lbs0 lbs2,031 lbs
29Phosgene75-44-51,958 lbs0 lbs1,958 lbs
30Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
31sec-Butyl alcohol78-92-21,481 lbs0 lbs1,481 lbs
32Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
33Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
34Acrolein107-02-8810 lbs0 lbs810 lbs
35Manganese7439-96-5511 lbs282 lbs793 lbs
36Naphthalene91-20-3245 lbs0 lbs245 lbs
371,3-Butadiene106-99-0217 lbs0 lbs217 lbs
38Ethylbenzene100-41-4216 lbs0 lbs216 lbs
39Hexazinone51235-04-20 lbs212 lbs212 lbs
40Zinc compoundsN9820 lbs155 lbs155 lbs
41Nickel7440-02-00 lbs152 lbs152 lbs
42Chromium7440-47-345 lbs25 lbs70 lbs
43N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
44Nickel compoundsN4954 lbs3 lbs8 lbs
45Copper And Copper CompoundsN1000 lbs6 lbs6 lbs
46Nickel And Nickel CompoundsN4952 lbs1 lbs3 lbs
47Methyl isocyanate624-83-91 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Aluminum oxide (fibrous forms), Maleic anhydride, Acetaldehyde, Ethylene

View the full list of 26 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (26 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-149,340 lbs0 lbs1,599,115 lbs
2Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
3Maleic anhydride108-31-61,569 lbs0 lbs134,889 lbs
4Acetaldehyde75-07-056,530 lbs0 lbs89,110 lbs
5Ethylene74-85-175,130 lbs0 lbs75,130 lbs
6Vinyl acetate108-05-47,022 lbs0 lbs49,594 lbs
7Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-929,545 lbs0 lbs29,545 lbs
8Hydroquinone123-31-90 lbs0 lbs28,819 lbs
9Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
10Acrolein107-02-8209 lbs0 lbs7,515 lbs
11Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
12Formaldehyde50-00-03,559 lbs0 lbs5,799 lbs
13sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
14n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
15Hydrogen fluoride7664-39-31,738 lbs0 lbs1,738 lbs
16Polycyclic aromatic compoundsN5900 lbs0 lbs1,652 lbs
17Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
18Chlorine7782-50-51,121 lbs0 lbs1,121 lbs
19Propylene115-07-1500 lbs0 lbs500 lbs
20Naphthalene91-20-3245 lbs0 lbs245 lbs
21Ethylbenzene100-41-4216 lbs0 lbs216 lbs
22Methyl methacrylate80-62-6142 lbs0 lbs142 lbs
23Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
24Phosgene75-44-527 lbs0 lbs27 lbs
25Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
26Ethylene glycol107-21-11 lbs0 lbs1 lbs

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