Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 11321 N H St, La Porte, TX 77571

HCAD #0231360000392
🧭Jump to Section
🌍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
11321 N H St, La Porte, TX 77571
Building Size
3,760sqft
Total structure area from HCAD building records.
Elevation
21.27 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)
31.11 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)
$263,711
Based on HCAD building value of $405,710.
Depth-Damage (Neighborhood)
$207,129
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
19.1th percentile
Property Pollution Ranking
High
Higher pollution than 81% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
1.07 millionlbs
Extremely High
163.6x more than typical Houston property
≈ 53 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
1.07 millionlbs
Extremely High
221.3x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
0lbs
Low
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
13
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)1,067,245 lbs1,067,245 lbs0 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)77,070 lbs77,070 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 81% 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):
Methanol, Ethylene, Vinyl acetate, Xylene (mixed isomers), Formaldehyde
View the full list of 25 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(25 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Methanol67-56-1458,073 lbs0 lbs458,073 lbs
2Ethylene74-85-1312,775 lbs0 lbs312,775 lbs
3Vinyl acetate108-05-4102,664 lbs0 lbs102,664 lbs
4Xylene (mixed isomers)1330-20-753,525 lbs0 lbs53,525 lbs
5Formaldehyde50-00-036,646 lbs0 lbs36,646 lbs
6Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
7Ammonia7664-41-717,995 lbs0 lbs17,995 lbs
8Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
9Chlorine7782-50-511,230 lbs0 lbs11,230 lbs
10Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
11Propylene115-07-14,500 lbs0 lbs4,500 lbs
12Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
13Mercury7439-97-60 lbs0 lbs2,200 lbs
14Phosgene75-44-51,958 lbs0 lbs1,958 lbs
15Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
16Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
17Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
18sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
19n-Butyl alcohol71-36-31,164 lbs0 lbs1,164 lbs
20Manganese7439-96-5511 lbs0 lbs511 lbs
21Naphthalene91-20-3245 lbs0 lbs245 lbs
22Ethylbenzene100-41-4216 lbs0 lbs216 lbs
23Chromium7440-47-345 lbs0 lbs45 lbs
24N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
25Acetaldehyde75-07-010 lbs0 lbs10 lbs
📋
Top chemicals released near this property (2024 only):
Methanol, Ethylene, Vinyl acetate, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Formaldehyde
View the full list of 21 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(21 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-144,110 lbs0 lbs44,110 lbs
2Ethylene74-85-19,510 lbs0 lbs9,510 lbs
3Vinyl acetate108-05-46,880 lbs0 lbs6,880 lbs
4Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
5Formaldehyde50-00-03,559 lbs0 lbs3,559 lbs
6Maleic anhydride108-31-61,569 lbs0 lbs1,569 lbs
7Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
8Chlorine7782-50-51,121 lbs0 lbs1,121 lbs
9Ammonia7664-41-7895 lbs0 lbs895 lbs
10Propylene115-07-1500 lbs0 lbs500 lbs
11Chloroacetic acid79-11-8476 lbs0 lbs476 lbs
12Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs250 lbs
13Naphthalene91-20-3245 lbs0 lbs245 lbs
14Ethylbenzene100-41-4216 lbs0 lbs216 lbs
15Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
16sec-Butyl alcohol78-92-293 lbs0 lbs93 lbs
17n-Butyl alcohol71-36-375 lbs0 lbs75 lbs
18Phosgene75-44-527 lbs0 lbs27 lbs
19Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
20Acetaldehyde75-07-010 lbs0 lbs10 lbs
21Ethylene glycol107-21-11 lbs0 lbs1 lbs
Loading property data...
🏘️Explore More Properties