Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 11531 N H St, La Porte, TX 77571

HCAD #0231360000290
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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
11531 N H St, La Porte, TX 77571
Building Size
3,160sqft
Total structure area from HCAD building records.
Elevation
20.32 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)
30.16 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)
$246,366
Based on HCAD building value of $379,026.
Depth-Damage (Neighborhood)
$174,918
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
14.6th 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)
2.58 millionlbs
Extremely High
394.9x more than typical Houston property
≈ 129 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
1.63 millionlbs
Extremely High
339.0x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
942 thousandlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
16
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)2,576,545 lbs1,634,887 lbs941,658 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)77,820 lbs77,820 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 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):
Methanol, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Vinyl acetate, Xylene (mixed isomers)
View the full list of 43 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(43 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Methanol67-56-1811,791 lbs0 lbs1,070,791 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs911,682 lbs911,682 lbs
3Ethylene74-85-1339,669 lbs0 lbs339,669 lbs
4Vinyl acetate108-05-4119,429 lbs0 lbs257,039 lbs
5Xylene (mixed isomers)1330-20-754,281 lbs0 lbs68,626 lbs
6Formaldehyde50-00-063,808 lbs0 lbs63,808 lbs
7n-Butyl alcohol71-36-349,206 lbs0 lbs49,206 lbs
8Toluene108-88-345,000 lbs0 lbs45,000 lbs
9Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
10Copper compoundsN1001 lbs84 lbs29,084 lbs
11Sodium nitrite7632-00-00 lbs26,012 lbs26,012 lbs
12Ammonia7664-41-717,995 lbs3,199 lbs21,194 lbs
13n-Hexane110-54-316,824 lbs0 lbs16,824 lbs
14Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
15Hydroquinone123-31-90 lbs0 lbs14,940 lbs
16Propylene115-07-113,154 lbs0 lbs13,154 lbs
17Chlorine7782-50-511,961 lbs0 lbs11,961 lbs
18Acetaldehyde75-07-03,797 lbs0 lbs10,027 lbs
19Dimethylamine124-40-37,035 lbs0 lbs7,035 lbs
20Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
21Dichloromethane75-09-25,437 lbs0 lbs5,437 lbs
22Acetonitrile75-05-85,326 lbs0 lbs5,326 lbs
23Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
24Mercury7439-97-60 lbs0 lbs2,200 lbs
25Phosgene75-44-51,958 lbs0 lbs1,958 lbs
26Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
27Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
28Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
29sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
30Hydrogen fluoride7664-39-31,062 lbs0 lbs1,062 lbs
31Manganese7439-96-5511 lbs282 lbs793 lbs
32Methyl methacrylate80-62-6385 lbs0 lbs385 lbs
33Naphthalene91-20-3245 lbs0 lbs245 lbs
34Ethylbenzene100-41-4216 lbs0 lbs216 lbs
35Hexazinone51235-04-20 lbs212 lbs212 lbs
36Nickel7440-02-00 lbs152 lbs152 lbs
37Chromium7440-47-345 lbs25 lbs70 lbs
38Methyl acrylate96-33-355 lbs0 lbs55 lbs
39N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
40Nickel compoundsN4954 lbs3 lbs8 lbs
41Copper And Copper CompoundsN1000 lbs6 lbs6 lbs
42Nickel And Nickel CompoundsN4952 lbs1 lbs3 lbs
43Methyl isocyanate624-83-91 lbs0 lbs1 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)
1Methanol67-56-144,860 lbs0 lbs44,860 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
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