Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 409 Valley Brook Dr, La Porte, TX 77571

HCAD #1115510000013
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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
409 Valley Brook Dr, La Porte, TX 77571
Building Size
2,841sqft
Total structure area from HCAD building records.
Elevation
18.73 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)
28.57 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)
$130,877
Based on HCAD building value of $201,350.
Depth-Damage (Neighborhood)
$148,027
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
14.9th percentile
Property Pollution Ranking
High
Higher pollution than 85% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
2.35 millionlbs
Extremely High
359.8x more than typical Houston property
≈ 117 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
2.33 millionlbs
Extremely High
483.4x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
16 thousandlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
10
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)2,347,499 lbs2,331,163 lbs16,336 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)252,369 lbs251,094 lbs1,275 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 85% 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):
n-Hexane, Ammonia, Nitric acid, Ethylene, Molybdenum trioxide
View the full list of 33 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(33 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1n-Hexane110-54-31,013,131 lbs0 lbs1,013,131 lbs
2Ammonia7664-41-7413,789 lbs123 lbs413,932 lbs
3Nitric acid7697-37-2397,602 lbs55 lbs397,682 lbs
4Ethylene74-85-1397,288 lbs0 lbs397,288 lbs
5Molybdenum trioxide1313-27-537,655 lbs3,227 lbs40,897 lbs
6Hydrogen sulfide7783-06-431,678 lbs0 lbs31,678 lbs
7Nickel compoundsN49511,795 lbs1,904 lbs13,714 lbs
8Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51130 lbs9,885 lbs9,930 lbs
9Cobalt compoundsN0965,871 lbs886 lbs6,772 lbs
10Nickel And Nickel CompoundsN4954,878 lbs62 lbs4,940 lbs
11Cobalt And Cobalt CompoundsN0964,551 lbs42 lbs4,593 lbs
12Methanol67-56-13,226 lbs0 lbs3,226 lbs
13Toluene108-88-32,687 lbs0 lbs2,687 lbs
14Xylene (mixed isomers)1330-20-72,454 lbs0 lbs2,454 lbs
15Certain glycol ethersN2301,449 lbs0 lbs1,450 lbs
161,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
17Ethylene oxide75-21-8791 lbs0 lbs791 lbs
18Cyclohexane110-82-7377 lbs0 lbs377 lbs
19Lead And Lead CompoundsN420211 lbs10 lbs221 lbs
20Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N040145 lbs30 lbs175 lbs
21Formaldehyde50-00-046 lbs102 lbs148 lbs
22Lead compoundsN420138 lbs4 lbs142 lbs
23Copper compoundsN100132 lbs6 lbs138 lbs
24Ethylbenzene100-41-494 lbs0 lbs94 lbs
25Cumene98-82-868 lbs0 lbs68 lbs
26Chloromethane74-87-351 lbs0 lbs51 lbs
27Naphthalene91-20-333 lbs0 lbs33 lbs
28Propylene oxide75-56-914 lbs0 lbs14 lbs
29Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
30Methyl methacrylate80-62-62 lbs0 lbs2 lbs
31Maleic anhydride108-31-61 lbs0 lbs1 lbs
32Ethylene glycol107-21-11 lbs0 lbs1 lbs
33n-Butyl alcohol71-36-31 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
n-Hexane, Ethylene, Ammonia, Nitric acid, Hydrogen sulfide
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)
1n-Hexane110-54-3116,540 lbs0 lbs116,540 lbs
2Ethylene74-85-171,321 lbs0 lbs71,321 lbs
3Ammonia7664-41-745,360 lbs5 lbs45,365 lbs
4Nitric acid7697-37-29,488 lbs5 lbs9,493 lbs
5Hydrogen sulfide7783-06-43,596 lbs0 lbs3,596 lbs
6Molybdenum trioxide1313-27-52,770 lbs482 lbs3,252 lbs
7Nickel compoundsN4951,017 lbs108 lbs1,125 lbs
8Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs622 lbs622 lbs
9Cobalt compoundsN096455 lbs36 lbs491 lbs
10Methanol67-56-1139 lbs0 lbs139 lbs
11Cobalt And Cobalt CompoundsN09682 lbs8 lbs90 lbs
12Nickel And Nickel CompoundsN49582 lbs8 lbs90 lbs
131,2,4-Trimethylbenzene95-63-674 lbs0 lbs74 lbs
14Ethylene oxide75-21-863 lbs0 lbs63 lbs
15Xylene (mixed isomers)1330-20-739 lbs0 lbs39 lbs
16Cyclohexane110-82-724 lbs0 lbs24 lbs
17Lead And Lead CompoundsN42016 lbs1 lbs17 lbs
18Toluene108-88-316 lbs0 lbs16 lbs
19Cumene98-82-84 lbs0 lbs4 lbs
20Ethylbenzene100-41-44 lbs0 lbs4 lbs
21Formaldehyde50-00-03 lbs0 lbs3 lbs
22Propylene oxide75-56-91 lbs0 lbs1 lbs
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