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
11503 ORCHARD MOUNTAIN DR HOUSTON 77059
Building Size
3,347 sqft
Total structure area from HCAD building records.
Elevation
11.96 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
Moderate
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
Moderate
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: 1.96 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.

  • This property is in a high-risk flood zone. Flood insurance is required for mortgages.
  • Consider flood mitigation measures like elevated utilities and flood vents.
  • 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 82% 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)
1.21 million lbs
Extremely High
186.2x more than typical Houston property
≈ 61 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)
1.21 million lbs
Extremely High
251.9x 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)1,214,861 lbs1,214,861 lbs0 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)325,972 lbs70,165 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 82% 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):

Ethylene, n-Hexane, Ethylene glycol, Ethylene oxide, N,N-Dimethylformamide

View the full list of 40 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (40 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Ethylene74-85-1325,882 lbs0 lbs325,882 lbs
2n-Hexane110-54-3136,945 lbs0 lbs136,945 lbs
3Ethylene glycol107-21-1105,361 lbs0 lbs105,361 lbs
4Ethylene oxide75-21-898,136 lbs0 lbs98,136 lbs
5N,N-Dimethylformamide68-12-286,451 lbs0 lbs86,451 lbs
6Butyl acrylate141-32-272,623 lbs0 lbs72,623 lbs
7Styrene100-42-569,830 lbs0 lbs69,830 lbs
81,3-Butadiene106-99-059,009 lbs0 lbs59,009 lbs
9Methyl methacrylate80-62-657,260 lbs0 lbs57,260 lbs
10Certain glycol ethersN23045,100 lbs0 lbs45,100 lbs
11Methanol67-56-131,787 lbs0 lbs31,787 lbs
12Acetaldehyde75-07-025,328 lbs0 lbs25,328 lbs
13n-Butyl alcohol71-36-320,009 lbs0 lbs20,009 lbs
14Chlorine7782-50-515,132 lbs0 lbs15,132 lbs
15tert-Butyl alcohol75-65-015,105 lbs0 lbs15,105 lbs
162-Methoxyethanol109-86-411,669 lbs0 lbs11,669 lbs
17Chloroethane75-00-39,070 lbs0 lbs9,070 lbs
18Toluene108-88-36,900 lbs0 lbs6,900 lbs
192-Ethoxyethanol110-80-56,044 lbs0 lbs6,044 lbs
20Cumene98-82-84,983 lbs0 lbs4,983 lbs
21Propylene oxide75-56-92,474 lbs0 lbs2,474 lbs
22Zinc compoundsN9822,334 lbs0 lbs2,334 lbs
23Ammonia7664-41-71,741 lbs0 lbs1,741 lbs
24Allyl chloride107-05-11,277 lbs0 lbs1,277 lbs
25NonylphenolN5301,013 lbs0 lbs1,013 lbs
26Nonylphenol EthoxylatesN5351,008 lbs0 lbs1,008 lbs
27Vanadium compoundsN770945 lbs0 lbs960 lbs
28Acrylonitrile107-13-1775 lbs0 lbs775 lbs
29Phosphorus (yellow or white)12185-10-3250 lbs0 lbs250 lbs
30Formic acid64-18-6137 lbs0 lbs137 lbs
31Naphthalene91-20-397 lbs0 lbs97 lbs
32Ethyl acrylate140-88-549 lbs0 lbs49 lbs
33Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51145 lbs0 lbs45 lbs
34Sodium nitrite7632-00-033 lbs0 lbs33 lbs
35Formaldehyde50-00-025 lbs0 lbs25 lbs
36Cumene hydroperoxide80-15-924 lbs0 lbs24 lbs
374,4'-Diaminodiphenyl ether101-80-46 lbs0 lbs6 lbs
38Lead compoundsN4202 lbs0 lbs2 lbs
39Lead And Lead CompoundsN4201 lbs0 lbs1 lbs
40N-Methyl-2-pyrrolidone872-50-41 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Ethylene glycol, Nonylphenol Ethoxylates, Ethylene, Ethylene oxide, Certain glycol ethers

View the full list of 25 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (25 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene glycol107-21-13,267 lbs0 lbs145,949 lbs
2Nonylphenol EthoxylatesN535131 lbs0 lbs81,533 lbs
3Ethylene74-85-118,976 lbs0 lbs18,976 lbs
4Ethylene oxide75-21-87,542 lbs0 lbs13,389 lbs
5Certain glycol ethersN2303,460 lbs0 lbs13,228 lbs
6Chloroethane75-00-33,424 lbs0 lbs9,649 lbs
7N,N-Dimethylformamide68-12-27,763 lbs0 lbs8,980 lbs
8Methanol67-56-13,702 lbs0 lbs6,614 lbs
9Methyl methacrylate80-62-66,109 lbs0 lbs6,277 lbs
10n-Hexane110-54-33,871 lbs0 lbs4,482 lbs
11Butyl acrylate141-32-23,592 lbs0 lbs3,681 lbs
12n-Butyl alcohol71-36-31,271 lbs0 lbs3,468 lbs
13Toluene108-88-3279 lbs0 lbs1,851 lbs
14Styrene100-42-51,292 lbs0 lbs1,321 lbs
15Chlorine7782-50-51,293 lbs0 lbs1,293 lbs
161,3-Butadiene106-99-01,172 lbs0 lbs1,172 lbs
172-Methoxyethanol109-86-41,027 lbs0 lbs1,045 lbs
18Acetaldehyde75-07-0375 lbs0 lbs1,034 lbs
19tert-Butyl alcohol75-65-0771 lbs0 lbs771 lbs
202-Ethoxyethanol110-80-5407 lbs0 lbs429 lbs
21Propylene oxide75-56-969 lbs0 lbs233 lbs
22NonylphenolN5301 lbs0 lbs224 lbs
23Cumene98-82-8206 lbs0 lbs206 lbs
24Allyl chloride107-05-1165 lbs0 lbs165 lbs
254,4'-Diaminodiphenyl ether101-80-40 lbs0 lbs1 lbs

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