Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 9902 King William Dr, La Porte, TX 77571

HCAD #1260560020018
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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
9902 King William Dr, La Porte, TX 77571
Building Size
3,267sqft
Total structure area from HCAD building records.
Elevation
23.15 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)
32.99 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)
$158,624
Based on HCAD building value of $244,037.
Depth-Damage (Neighborhood)
$160,710
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
20.1th 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)
837 thousandlbs
Extremely High
128.2x more than typical Houston property
≈ 42 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
825 thousandlbs
Extremely High
171.2x 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
6
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)836,563 lbs825,438 lbs11,125 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)55,315 lbs54,658 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, Molybdenum trioxide, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Cobalt And Cobalt Compounds
View the full list of 29 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(29 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
3Molybdenum trioxide1313-27-510,410 lbs62 lbs10,487 lbs
4Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51130 lbs9,885 lbs9,930 lbs
5Cobalt And Cobalt CompoundsN0964,251 lbs37 lbs4,288 lbs
6Nickel And Nickel CompoundsN4954,176 lbs41 lbs4,217 lbs
7Methanol67-56-13,226 lbs0 lbs3,226 lbs
8Nickel compoundsN4951,910 lbs756 lbs2,681 lbs
9Cobalt compoundsN0961,910 lbs20 lbs1,945 lbs
10Certain glycol ethersN2301,449 lbs0 lbs1,450 lbs
111,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
12Xylene (mixed isomers)1330-20-7874 lbs0 lbs874 lbs
13Toluene108-88-3807 lbs0 lbs807 lbs
14Ethylene oxide75-21-8791 lbs0 lbs791 lbs
15Cyclohexane110-82-7377 lbs0 lbs377 lbs
16Lead And Lead CompoundsN420211 lbs10 lbs221 lbs
17Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N040145 lbs30 lbs175 lbs
18Formaldehyde50-00-046 lbs102 lbs148 lbs
19Lead compoundsN420138 lbs4 lbs142 lbs
20Ethylbenzene100-41-494 lbs0 lbs94 lbs
21Cumene98-82-868 lbs0 lbs68 lbs
22Chloromethane74-87-351 lbs0 lbs51 lbs
23Naphthalene91-20-333 lbs0 lbs33 lbs
24Propylene oxide75-56-914 lbs0 lbs14 lbs
25Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
26Methyl methacrylate80-62-62 lbs0 lbs2 lbs
27Maleic anhydride108-31-61 lbs0 lbs1 lbs
28Ethylene glycol107-21-11 lbs0 lbs1 lbs
29n-Butyl alcohol71-36-31 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Ammonia, Nitric acid, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Molybdenum trioxide, Methanol
View the full list of 17 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(17 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
3Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs622 lbs622 lbs
4Molybdenum trioxide1313-27-5158 lbs8 lbs166 lbs
5Methanol67-56-1139 lbs0 lbs139 lbs
6Cobalt And Cobalt CompoundsN09682 lbs8 lbs90 lbs
7Nickel And Nickel CompoundsN49582 lbs8 lbs90 lbs
81,2,4-Trimethylbenzene95-63-674 lbs0 lbs74 lbs
9Ethylene oxide75-21-863 lbs0 lbs63 lbs
10Xylene (mixed isomers)1330-20-739 lbs0 lbs39 lbs
11Cyclohexane110-82-724 lbs0 lbs24 lbs
12Lead And Lead CompoundsN42016 lbs1 lbs17 lbs
13Toluene108-88-316 lbs0 lbs16 lbs
14Cumene98-82-84 lbs0 lbs4 lbs
15Ethylbenzene100-41-44 lbs0 lbs4 lbs
16Formaldehyde50-00-03 lbs0 lbs3 lbs
17Propylene oxide75-56-91 lbs0 lbs1 lbs
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