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Complete Property Analysis

Environmental risk, tax analysis, and property details for 9325 Sioux Dr, La Porte, TX 77571

HCAD #1202430060017
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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
9325 Sioux Dr, La Porte, TX 77571
Building Size
2,200sqft
Total structure area from HCAD building records.
Elevation
24.81 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)
34.65 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)
$124,449
Based on HCAD building value of $191,460.
Depth-Damage (Neighborhood)
$118,361
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
20.0th percentile
Property Pollution Ranking
High
Higher pollution than 80% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
870 thousandlbs
Extremely High
133.3x more than typical Houston property
≈ 43 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
859 thousandlbs
Extremely High
178.1x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
11 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)869,799 lbs858,674 lbs11,125 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)59,028 lbs58,371 lbs657 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 80% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile.
📋
Top chemicals released near this property (past 10 years):
Nitric acid, Ammonia, Methanol, Molybdenum trioxide, Nitrate compounds (water dissociable; reportable only when in aqueous solution)
View the full list of 38 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(38 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitric acid7697-37-2397,654 lbs55 lbs397,734 lbs
2Ammonia7664-41-7395,794 lbs123 lbs395,937 lbs
3Methanol67-56-19,356 lbs0 lbs15,883 lbs
4Molybdenum trioxide1313-27-510,410 lbs62 lbs10,487 lbs
5Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51130 lbs9,885 lbs9,930 lbs
6Certain glycol ethersN2309,458 lbs0 lbs9,459 lbs
7n-Hexane110-54-37,167 lbs0 lbs7,167 lbs
8Cobalt And Cobalt CompoundsN0964,251 lbs37 lbs4,288 lbs
9Nickel And Nickel CompoundsN4954,176 lbs41 lbs4,217 lbs
10Toluene108-88-32,689 lbs0 lbs2,689 lbs
11Nickel compoundsN4951,910 lbs756 lbs2,681 lbs
12Xylene (mixed isomers)1330-20-72,454 lbs0 lbs2,454 lbs
13Ethylene oxide75-21-82,160 lbs0 lbs2,160 lbs
14Propylene oxide75-56-91,981 lbs0 lbs1,981 lbs
15Cobalt compoundsN0961,910 lbs20 lbs1,945 lbs
16Dimethylamine124-40-31,745 lbs0 lbs1,745 lbs
17NonylphenolN5301,013 lbs0 lbs1,013 lbs
18Nonylphenol EthoxylatesN5351,008 lbs0 lbs1,008 lbs
191,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
20Cyclohexane110-82-7857 lbs0 lbs857 lbs
21Maleic anhydride108-31-6612 lbs0 lbs612 lbs
22Lead And Lead CompoundsN420211 lbs10 lbs221 lbs
23Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N040145 lbs30 lbs175 lbs
24Bifenthrin82657-04-3149 lbs0 lbs149 lbs
25Formaldehyde50-00-046 lbs102 lbs148 lbs
26Lead compoundsN420138 lbs4 lbs142 lbs
27Ethylbenzene100-41-494 lbs0 lbs94 lbs
28Diphenylamine122-39-487 lbs0 lbs87 lbs
29Cumene98-82-868 lbs0 lbs68 lbs
30Cyanide compoundsN1065 lbs0 lbs58 lbs
31Chloromethane74-87-351 lbs0 lbs51 lbs
32Naphthalene91-20-333 lbs0 lbs33 lbs
33tert-Butyl alcohol75-65-023 lbs0 lbs23 lbs
34Oxyfluorfen42874-03-310 lbs0 lbs10 lbs
35Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
36Methyl methacrylate80-62-62 lbs0 lbs2 lbs
37Ethylene glycol107-21-11 lbs0 lbs1 lbs
38n-Butyl alcohol71-36-31 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Ammonia, Nitric acid, Methanol, Certain glycol ethers, Nitrate compounds (water dissociable; reportable only when in aqueous solution)
View the full list of 23 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(23 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ammonia7664-41-744,465 lbs5 lbs44,470 lbs
2Nitric acid7697-37-29,488 lbs5 lbs9,493 lbs
3Methanol67-56-11,986 lbs0 lbs1,986 lbs
4Certain glycol ethersN230961 lbs0 lbs961 lbs
5Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs622 lbs622 lbs
6n-Hexane110-54-3607 lbs0 lbs607 lbs
7Molybdenum trioxide1313-27-5158 lbs8 lbs166 lbs
8Nonylphenol EthoxylatesN535131 lbs0 lbs131 lbs
9Dimethylamine124-40-3113 lbs0 lbs113 lbs
10Cobalt And Cobalt CompoundsN09682 lbs8 lbs90 lbs
11Nickel And Nickel CompoundsN49582 lbs8 lbs90 lbs
121,2,4-Trimethylbenzene95-63-674 lbs0 lbs74 lbs
13Ethylene oxide75-21-870 lbs0 lbs70 lbs
14Propylene oxide75-56-939 lbs0 lbs39 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
19Maleic anhydride108-31-68 lbs0 lbs8 lbs
20Cumene98-82-84 lbs0 lbs4 lbs
21Ethylbenzene100-41-44 lbs0 lbs4 lbs
22Formaldehyde50-00-03 lbs0 lbs3 lbs
23NonylphenolN5301 lbs0 lbs1 lbs
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