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
709 N 11TH ST LA PORTE 77571
Building Size
3,163 sqft
Total structure area from HCAD building records.
Elevation
19.85 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: 9.85 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 86% 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)
2.75 million lbs
Extremely High
421.7x more than typical Houston property
≈ 138 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)
1.81 million lbs
Extremely High
375.3x 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)
942 thousand 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)2,751,335 lbs1,809,677 lbs941,658 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,674,278 lbs105,033 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 86% 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, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Vinyl acetate, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 43 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (43 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Methanol67-56-1825,965 lbs0 lbs1,084,965 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs911,682 lbs911,682 lbs
3Ethylene74-85-1339,669 lbs0 lbs339,669 lbs
4Vinyl acetate108-05-4119,429 lbs0 lbs257,039 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9216,585 lbs0 lbs216,585 lbs
6Formaldehyde50-00-063,808 lbs0 lbs63,808 lbs
7n-Butyl alcohol71-36-349,206 lbs0 lbs49,206 lbs
8Toluene108-88-346,261 lbs0 lbs46,261 lbs
9Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
10Copper compoundsN1001 lbs84 lbs29,084 lbs
11Sodium nitrite7632-00-00 lbs26,012 lbs26,012 lbs
12Xylene (mixed isomers)1330-20-711,137 lbs0 lbs25,482 lbs
13Hydrogen fluoride7664-39-319,001 lbs0 lbs19,001 lbs
14n-Hexane110-54-316,824 lbs0 lbs16,824 lbs
15Hydroquinone123-31-90 lbs0 lbs14,940 lbs
16Propylene115-07-113,154 lbs0 lbs13,154 lbs
17Chlorine7782-50-511,961 lbs0 lbs11,961 lbs
18Acetaldehyde75-07-03,797 lbs0 lbs10,027 lbs
19Acetonitrile75-05-87,091 lbs0 lbs7,091 lbs
20Dimethylamine124-40-37,035 lbs0 lbs7,035 lbs
21Dichloromethane75-09-25,688 lbs0 lbs5,688 lbs
22Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
23Ammonia7664-41-70 lbs3,199 lbs3,199 lbs
24Chlorobenzene108-90-73,127 lbs0 lbs3,127 lbs
25Mercury7439-97-60 lbs0 lbs2,200 lbs
26Phosgene75-44-51,958 lbs0 lbs1,958 lbs
27Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
28Methyl tert-butyl ether1634-04-41,591 lbs0 lbs1,591 lbs
29Triethylamine121-44-81,515 lbs0 lbs1,515 lbs
30Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
31Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
32sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
33Manganese7439-96-5511 lbs282 lbs793 lbs
34N,N-Dimethylformamide68-12-2535 lbs0 lbs535 lbs
35Methyl methacrylate80-62-6385 lbs0 lbs385 lbs
36Hexazinone51235-04-20 lbs212 lbs212 lbs
37Nickel7440-02-00 lbs152 lbs152 lbs
38Chromium7440-47-345 lbs25 lbs70 lbs
39Methyl acrylate96-33-355 lbs0 lbs55 lbs
40Nickel compoundsN4954 lbs3 lbs8 lbs
41Copper And Copper CompoundsN1000 lbs6 lbs6 lbs
42Nickel And Nickel CompoundsN4952 lbs1 lbs3 lbs
43Methyl isocyanate624-83-91 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

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

View the full list of 18 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (18 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-144,860 lbs0 lbs1,217,924 lbs
2Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
3Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-929,545 lbs0 lbs29,545 lbs
4Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
5Vinyl acetate108-05-46,880 lbs0 lbs20,379 lbs
6Ethylene74-85-19,510 lbs0 lbs9,510 lbs
7Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
8Formaldehyde50-00-03,559 lbs0 lbs5,799 lbs
9sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
10n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
11Hydrogen fluoride7664-39-31,738 lbs0 lbs1,738 lbs
12Polycyclic aromatic compoundsN5900 lbs0 lbs1,652 lbs
13Chlorine7782-50-51,121 lbs0 lbs1,121 lbs
14Propylene115-07-1500 lbs0 lbs500 lbs
15Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
16Phosgene75-44-527 lbs0 lbs27 lbs
17Acetaldehyde75-07-010 lbs0 lbs15 lbs
18Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs

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