Data-driven insights for local properties

📊 Environmental Assessment Report

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.

🌊 Part 1: Flood Risk Analysis

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
11222 N H ST LA PORTE 77571
Building Size
5,789 sqft
Total structure area from HCAD building records.
Elevation
22.53 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very Low
Risk based on FEMA zone and simulation.

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 Low
Flood Depth
0 ft ±0.5 ft
No flooding at current water level.
Water Surface Elevation (WSE)
N/A
Water surface elevation data not available.
Area Inundated
N/A
Data not available
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage Estimate (HCAD Valuation)
$0
Property not flooded at current water level. No damage to calculate.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Property not flooded at current water level. No damage to calculate.
Analysis Method
COG Bathtub 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 Safe
Safety Margin: 12.53 feet
Severity: Safe

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.

  • FEMA Zone X (minimal hazard) - flood insurance available at preferred rates.
  • Review the interactive flood simulator to understand how different rainfall events could affect this property.
  • Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking
High
Higher pollution than 84% of Houston homes
This ranking compares pollution levels within 2 miles of this property against 10,000 randomly sampled Houston metro properties. Lower percentiles indicate higher pollution exposure.
Industrial Pollution Nearby (Last 10 Years)
1.82 million lbs
Extremely High
279.5x more than typical Houston property
≈ 91 dump trucks of chemicals within 2 miles
Total chemical releases from all industrial facilities within a 2-mile radius over the past decade (2014–2024). Data from EPA's Toxic Release Inventory tracking air, water, and land discharges.
💨 Air Pollution (Last 10 Years)
1.82 million lbs
Extremely High
378.2x more than typical Houston property
Chemicals released into the air from nearby facilities over 10 years. Includes both fugitive emissions (leaks, evaporation) and stack emissions (smokestacks, vents). May affect local air quality.
💧 Water Pollution (Last 10 Years)
170 lbs
High
Most Houston properties have none nearby
Chemical discharges to surface water (bayous, streams, drainage) from industrial facilities within 2 miles over the past decade. May impact local waterways and drainage systems.

❤️ 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)1,823,842 lbs1,823,672 lbs170 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)943,130 lbs233,343 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 84% 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 15% most polluted).

Top chemicals released near this property (past 10 years):

n-Hexane, Ethylene, Xylene (mixed isomers), Hydroquinone, Methanol

View the full list of 39 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (39 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-31,013,131 lbs0 lbs1,013,131 lbs
2Ethylene74-85-1404,288 lbs0 lbs404,288 lbs
3Xylene (mixed isomers)1330-20-754,400 lbs0 lbs54,400 lbs
4Hydroquinone123-31-942,495 lbs0 lbs42,495 lbs
5Methanol67-56-141,849 lbs0 lbs41,849 lbs
6Propylene115-07-141,301 lbs0 lbs41,301 lbs
7Formaldehyde50-00-036,691 lbs102 lbs36,794 lbs
8Methyl isobutyl ketone108-10-136,313 lbs0 lbs36,313 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
10Cumene98-82-831,165 lbs0 lbs31,165 lbs
11Ammonia7664-41-718,956 lbs68 lbs19,024 lbs
12Ethylene glycol107-21-116,752 lbs0 lbs16,752 lbs
13Chlorine7782-50-511,230 lbs0 lbs11,230 lbs
14Benzene71-43-210,536 lbs0 lbs10,536 lbs
15Styrene100-42-57,344 lbs0 lbs7,344 lbs
16Maleic anhydride108-31-65,570 lbs0 lbs5,570 lbs
17Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
18Mercury7439-97-60 lbs0 lbs2,200 lbs
19Phosgene75-44-51,958 lbs0 lbs1,958 lbs
20Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
21Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
22Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
23sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
24n-Butyl alcohol71-36-31,165 lbs0 lbs1,165 lbs
25Diphenylamine122-39-4997 lbs0 lbs997 lbs
261,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
27Toluene108-88-3807 lbs0 lbs807 lbs
28Ethylene oxide75-21-8791 lbs0 lbs791 lbs
29Manganese7439-96-5511 lbs0 lbs511 lbs
30Cyclohexane110-82-7377 lbs0 lbs377 lbs
31Ethylbenzene100-41-4310 lbs0 lbs310 lbs
32Naphthalene91-20-3278 lbs0 lbs278 lbs
33Chloromethane74-87-351 lbs0 lbs51 lbs
34Chromium7440-47-345 lbs0 lbs45 lbs
35N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
36Propylene oxide75-56-914 lbs0 lbs14 lbs
37Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
38Certain glycol ethersN2303 lbs0 lbs3 lbs
39Methyl methacrylate80-62-62 lbs0 lbs2 lbs

Top chemicals released near this property (2024 only):

Aluminum oxide (fibrous forms), Maleic anhydride, n-Hexane, Methanol, Ethylene

View the full list of 32 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (32 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
2Maleic anhydride108-31-61,569 lbs0 lbs135,289 lbs
3n-Hexane110-54-3116,540 lbs0 lbs117,040 lbs
4Methanol67-56-15,229 lbs0 lbs102,474 lbs
5Ethylene74-85-171,971 lbs0 lbs71,971 lbs
61,2,4-Trimethylbenzene95-63-674 lbs0 lbs43,988 lbs
7Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
8Xylene (mixed isomers)1330-20-71,183 lbs0 lbs14,402 lbs
9Toluene108-88-316 lbs0 lbs13,930 lbs
10Nonylphenol EthoxylatesN5350 lbs0 lbs11,809 lbs
11Propylene115-07-110,535 lbs0 lbs10,535 lbs
12Formaldehyde50-00-03,562 lbs0 lbs6,312 lbs
13Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
14Cumene98-82-82,616 lbs0 lbs5,324 lbs
15Hydroquinone123-31-94,862 lbs0 lbs4,862 lbs
16Naphthalene91-20-3245 lbs0 lbs4,285 lbs
17Methyl isobutyl ketone108-10-13,997 lbs0 lbs3,997 lbs
18sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
19Ethylbenzene100-41-4220 lbs0 lbs2,846 lbs
20Ethylene oxide75-21-863 lbs0 lbs2,763 lbs
21n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
22Ammonia7664-41-7897 lbs0 lbs1,323 lbs
23Ethylene glycol107-21-11 lbs0 lbs1,139 lbs
24Chlorine7782-50-51,121 lbs0 lbs1,121 lbs
25Benzene71-43-21,090 lbs0 lbs1,090 lbs
26Cyclohexane110-82-724 lbs0 lbs315 lbs
27Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
28Styrene100-42-5116 lbs0 lbs116 lbs
29Diphenylamine122-39-4103 lbs0 lbs103 lbs
30Phosgene75-44-527 lbs0 lbs27 lbs
31Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
32Propylene oxide75-56-91 lbs0 lbs1 lbs

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