Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 9727 Therrell Dr, Houston, Tx 77064

HCAD #1177100050058
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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 X
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
9727 Therrell Dr, Houston, Tx 77064
Building Size
3,861sqft
Total structure area from HCAD building records.
Elevation
109.15 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
46.0 acres
15.6% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$0
Property not flooded. No damage to calculate.
Depth-Damage (Neighborhood)
$0
Property not flooded. No damage to calculate.
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 Safe
Safety Margin: 0 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.

#1
Minimal flood hazard area - property outside mapped high-risk zones
#2
Flood insurance available at preferred rates - over 25% of claims occur in low-risk areas
#3
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#4
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
45.9th percentile
Property Pollution Ranking
Moderate
Higher pollution than 54% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
15 thousandlbs
Above Typical
2.4x more than typical Houston property
≈ 1 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
15 thousandlbs
Above Typical
3.1x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
162lbs
High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
7
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)15,336 lbs15,175 lbs162 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)937 lbs917 lbs20 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 54% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 40-49th percentile (slightly higher than average).
📋
Top chemicals released near this property (past 10 years):
Methanol, Toluene, Xylene (mixed isomers), n-Butyl alcohol, Certain glycol ethers
View the full list of 18 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(18 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Methanol67-56-18,147 lbs0 lbs8,147 lbs
2Toluene108-88-32,738 lbs0 lbs2,738 lbs
3Xylene (mixed isomers)1330-20-71,178 lbs0 lbs1,178 lbs
4n-Butyl alcohol71-36-31,042 lbs0 lbs1,042 lbs
5Certain glycol ethersN230915 lbs0 lbs915 lbs
6Methyl isobutyl ketone108-10-1630 lbs0 lbs630 lbs
71,2,4-Trimethylbenzene95-63-6328 lbs0 lbs328 lbs
8Chromium7440-47-330 lbs42 lbs97 lbs
9Manganese7439-96-530 lbs61 lbs92 lbs
10Nickel7440-02-025 lbs42 lbs77 lbs
11Naphthalene91-20-330 lbs0 lbs30 lbs
12tert-Butyl alcohol75-65-027 lbs0 lbs27 lbs
13Ethylbenzene100-41-426 lbs0 lbs26 lbs
14Copper7440-50-80 lbs17 lbs17 lbs
15Lead7439-92-115 lbs0 lbs15 lbs
16m-Xylene108-38-37 lbs0 lbs7 lbs
17Styrene100-42-53 lbs0 lbs3 lbs
18Cumene98-82-81 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Methanol, Toluene, Xylene (mixed isomers), Certain glycol ethers, Ethylbenzene
View the full list of 13 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(13 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-1487 lbs0 lbs487 lbs
2Toluene108-88-3266 lbs0 lbs266 lbs
3Xylene (mixed isomers)1330-20-788 lbs0 lbs88 lbs
4Certain glycol ethersN23033 lbs0 lbs33 lbs
5Ethylbenzene100-41-426 lbs0 lbs26 lbs
6n-Butyl alcohol71-36-313 lbs0 lbs13 lbs
7Manganese7439-96-50 lbs5 lbs5 lbs
8Nickel7440-02-00 lbs5 lbs5 lbs
9Chromium7440-47-30 lbs5 lbs5 lbs
10Copper7440-50-80 lbs5 lbs5 lbs
111,2,4-Trimethylbenzene95-63-62 lbs0 lbs2 lbs
12Lead7439-92-11 lbs0 lbs1 lbs
13Cumene98-82-81 lbs0 lbs1 lbs
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