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
11217 N H ST LA PORTE 77571
Elevation
21.65 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
Vacant lot (no building data). No structure to calculate damage for.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Vacant lot (no building data). No structure to calculate damage for.
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: 11.65 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 81% 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)
1.13 million lbs
Extremely High
173.5x more than typical Houston property
≈ 57 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)
1.13 million lbs
Extremely High
234.8x 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
Low
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)1,132,096 lbs1,132,096 lbs0 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,780,684 lbs79,770 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 81% 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, Ethylene, Vinyl acetate, Certain glycol ethers, Xylene (mixed isomers)

View the full list of 27 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (27 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Methanol67-56-1458,073 lbs0 lbs458,073 lbs
2Ethylene74-85-1312,775 lbs0 lbs312,775 lbs
3Vinyl acetate108-05-4102,664 lbs0 lbs102,664 lbs
4Certain glycol ethersN23062,831 lbs0 lbs62,831 lbs
5Xylene (mixed isomers)1330-20-753,525 lbs0 lbs53,525 lbs
6Formaldehyde50-00-036,646 lbs0 lbs36,646 lbs
7Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
8Ammonia7664-41-717,995 lbs0 lbs17,995 lbs
9Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
10Chlorine7782-50-511,230 lbs0 lbs11,230 lbs
11Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
12Propylene115-07-14,500 lbs0 lbs4,500 lbs
13Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
14Mercury7439-97-60 lbs0 lbs2,200 lbs
15Di(2-ethylhexyl) phthalate117-81-72,020 lbs0 lbs2,020 lbs
16Phosgene75-44-51,958 lbs0 lbs1,958 lbs
17Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
18Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
19Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
20sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
21n-Butyl alcohol71-36-31,164 lbs0 lbs1,164 lbs
22Manganese7439-96-5511 lbs0 lbs511 lbs
23Naphthalene91-20-3245 lbs0 lbs245 lbs
24Ethylbenzene100-41-4216 lbs0 lbs216 lbs
25Chromium7440-47-345 lbs0 lbs45 lbs
26N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
27Acetaldehyde75-07-010 lbs0 lbs10 lbs

Top chemicals released near this property (2024 only):

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

View the full list of 22 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (22 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-144,110 lbs0 lbs1,217,174 lbs
2Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
3Maleic anhydride108-31-61,569 lbs0 lbs134,889 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
10Certain glycol ethersN2302,700 lbs0 lbs2,700 lbs
11n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
12Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
13Chlorine7782-50-51,121 lbs0 lbs1,121 lbs
14Ammonia7664-41-7895 lbs0 lbs895 lbs
15Propylene115-07-1500 lbs0 lbs500 lbs
16Naphthalene91-20-3245 lbs0 lbs245 lbs
17Ethylbenzene100-41-4216 lbs0 lbs216 lbs
18Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
19Phosgene75-44-527 lbs0 lbs27 lbs
20Acetaldehyde75-07-010 lbs0 lbs15 lbs
21Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
22Ethylene glycol107-21-11 lbs0 lbs1 lbs

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