Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 11518 Orchard Mountain Dr, Houston, TX 77059

HCAD #1173450120009
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🌍Environmental Assessment

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.

🌊Flood Risk Analysis
FEMA Zone AE
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
11518 Orchard Mountain Dr, Houston, TX 77059
Building Size
4,185sqft
Total structure area from HCAD building records.
Elevation
12.27 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
Very High
Property flooded at 9.84ft depth.
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 High
Flood Depth
9.84 ft±0.5 ft
Depth of water above ground level.
Water Surface Elevation (WSE)
22.11 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
294.9 acres
100.0% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$278,660
Based on HCAD building value of $428,708.
Depth-Damage (Neighborhood)
$303,960
Based on neighborhood replacement cost.
Analysis Method
COG Combined 5000 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 Flooded
Flood Depth: 9.84 feet
Severity
Severe
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.

#1
Special Flood Hazard Area (SFHA): Flood insurance required for federally backed mortgages
#2
Obtain an Elevation Certificate to determine accurate flood insurance premiums
#3
Property elevation currently above simulated flood level
#4
Maintain flood insurance coverage as required in Special Flood Hazard Areas
#5
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#6
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
18.6th percentile
Property Pollution Ranking
High
Higher pollution than 81% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
1.2 millionlbs
Extremely High
183.2x more than typical Houston property
≈ 60 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
1.2 millionlbs
Extremely High
247.9x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
0lbs
None
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
2
Industrial facilities within 2 miles
💡
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)1,195,418 lbs1,195,418 lbs0 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)69,027 lbs69,027 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 chemicals released near this property (past 10 years):
Ethylene, n-Hexane, Ethylene glycol, Ethylene oxide, N,N-Dimethylformamide
View the full list of 26 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(26 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 glycol107-21-1104,840 lbs0 lbs104,840 lbs
4Ethylene oxide75-21-896,767 lbs0 lbs96,767 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 ethersN23037,091 lbs0 lbs37,091 lbs
11Methanol67-56-131,725 lbs0 lbs31,725 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
21Allyl chloride107-05-11,277 lbs0 lbs1,277 lbs
22Acrylonitrile107-13-1775 lbs0 lbs775 lbs
23Propylene oxide75-56-9624 lbs0 lbs624 lbs
24Ethyl acrylate140-88-549 lbs0 lbs49 lbs
25Cumene hydroperoxide80-15-924 lbs0 lbs24 lbs
264,4'-Diaminodiphenyl ether101-80-46 lbs0 lbs6 lbs
📋
Top chemicals released near this property (2024 only):
Ethylene, N,N-Dimethylformamide, Ethylene oxide, Methyl methacrylate, n-Hexane
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)
1Ethylene74-85-118,976 lbs0 lbs18,976 lbs
2N,N-Dimethylformamide68-12-27,763 lbs0 lbs7,763 lbs
3Ethylene oxide75-21-87,535 lbs0 lbs7,535 lbs
4Methyl methacrylate80-62-66,109 lbs0 lbs6,109 lbs
5n-Hexane110-54-33,871 lbs0 lbs3,871 lbs
6Methanol67-56-13,702 lbs0 lbs3,702 lbs
7Butyl acrylate141-32-23,592 lbs0 lbs3,592 lbs
8Chloroethane75-00-33,424 lbs0 lbs3,424 lbs
9Ethylene glycol107-21-13,267 lbs0 lbs3,267 lbs
10Certain glycol ethersN2302,499 lbs0 lbs2,499 lbs
11Chlorine7782-50-51,293 lbs0 lbs1,293 lbs
12Styrene100-42-51,292 lbs0 lbs1,292 lbs
13n-Butyl alcohol71-36-31,271 lbs0 lbs1,271 lbs
141,3-Butadiene106-99-01,172 lbs0 lbs1,172 lbs
152-Methoxyethanol109-86-41,027 lbs0 lbs1,027 lbs
16tert-Butyl alcohol75-65-0771 lbs0 lbs771 lbs
172-Ethoxyethanol110-80-5407 lbs0 lbs407 lbs
18Acetaldehyde75-07-0375 lbs0 lbs375 lbs
19Toluene108-88-3279 lbs0 lbs279 lbs
20Cumene98-82-8206 lbs0 lbs206 lbs
21Allyl chloride107-05-1165 lbs0 lbs165 lbs
22Propylene oxide75-56-931 lbs0 lbs31 lbs
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