Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 1709 Alvy Dr, La Porte, TX 77571

HCAD #0231400000461
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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
1709 Alvy Dr, La Porte, TX 77571
Building Size
3,626sqft
Total structure area from HCAD building records.
Elevation
23.14 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
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)
32.98 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
240.6 acres
81.6% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$224,898
Based on HCAD building value of $345,998.
Depth-Damage (Neighborhood)
$221,218
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
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
14.0th percentile
Property Pollution Ranking
High
Higher pollution than 86% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
3.08 millionlbs
Extremely High
472.4x more than typical Houston property
≈ 154 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
2.85 millionlbs
Extremely High
591.6x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
229 thousandlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
14
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)3,082,249 lbs2,852,780 lbs229,468 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)201,997 lbs201,997 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 chemicals released near this property (past 10 years):
Propylene, Methanol, Ethylene, n-Hexane, Vinyl acetate
View the full list of 23 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(23 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Propylene115-07-1923,527 lbs0 lbs923,527 lbs
2Methanol67-56-1663,972 lbs228,708 lbs892,680 lbs
3Ethylene74-85-1576,420 lbs0 lbs576,420 lbs
4n-Hexane110-54-3336,892 lbs0 lbs336,892 lbs
5Vinyl acetate108-05-4102,664 lbs0 lbs102,664 lbs
6Ammonia7664-41-789,901 lbs0 lbs89,901 lbs
7Certain glycol ethersN23062,831 lbs0 lbs62,831 lbs
8Xylene (mixed isomers)1330-20-743,144 lbs0 lbs43,144 lbs
9Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
10Boron trifluoride7637-07-214,190 lbs0 lbs14,190 lbs
11Chlorine7782-50-57,622 lbs605 lbs8,227 lbs
12Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
13Zinc compoundsN9824,689 lbs155 lbs4,844 lbs
14Mercury7439-97-60 lbs0 lbs2,200 lbs
15Di(2-ethylhexyl) phthalate117-81-72,020 lbs0 lbs2,020 lbs
16Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
17Naphthalene91-20-3245 lbs0 lbs245 lbs
181,3-Butadiene106-99-0217 lbs0 lbs217 lbs
19Ethylbenzene100-41-4216 lbs0 lbs216 lbs
20n-Butyl alcohol71-36-359 lbs0 lbs59 lbs
21sec-Butyl alcohol78-92-247 lbs0 lbs47 lbs
22Chromium7440-47-345 lbs0 lbs45 lbs
23Acetaldehyde75-07-010 lbs0 lbs10 lbs
📋
Top chemicals released near this property (2024 only):
Propylene, Methanol, Ethylene, n-Hexane, Vinyl acetate
View the full list of 16 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(16 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Propylene115-07-183,854 lbs0 lbs83,854 lbs
2Methanol67-56-139,020 lbs0 lbs39,020 lbs
3Ethylene74-85-136,365 lbs0 lbs36,365 lbs
4n-Hexane110-54-322,335 lbs0 lbs22,335 lbs
5Vinyl acetate108-05-46,880 lbs0 lbs6,880 lbs
6Ammonia7664-41-75,791 lbs0 lbs5,791 lbs
7Certain glycol ethersN2302,700 lbs0 lbs2,700 lbs
8Maleic anhydride108-31-61,569 lbs0 lbs1,569 lbs
9Boron trifluoride7637-07-21,192 lbs0 lbs1,192 lbs
10Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
11Zinc compoundsN982425 lbs0 lbs425 lbs
12Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs250 lbs
13Naphthalene91-20-3245 lbs0 lbs245 lbs
14Ethylbenzene100-41-4216 lbs0 lbs216 lbs
15Acetaldehyde75-07-010 lbs0 lbs10 lbs
16Ethylene glycol107-21-11 lbs0 lbs1 lbs
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