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
409 SPENCER LNDG W LA PORTE 77571
Building Size
2,456 sqft
Total structure area from HCAD building records.
Elevation
22.64 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: 12.64 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 85% 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)
2.06 million lbs
Extremely High
316.1x more than typical Houston property
≈ 103 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)
2.06 million lbs
Extremely High
426.6x 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)
5 thousand lbs
Very 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)2,062,377 lbs2,056,996 lbs5,381 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,199,848 lbs252,433 lbs618 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 15% most polluted).

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

n-Hexane, Ethylene, Methanol, Ammonia, Hydroquinone

View the full list of 50 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (50 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-31,013,131 lbs0 lbs1,013,131 lbs
2Ethylene74-85-1427,145 lbs0 lbs427,145 lbs
3Methanol67-56-1151,151 lbs0 lbs151,151 lbs
4Ammonia7664-41-7106,624 lbs68 lbs106,692 lbs
5Hydroquinone123-31-942,495 lbs0 lbs42,495 lbs
6Propylene115-07-141,301 lbs0 lbs41,301 lbs
7Methyl isobutyl ketone108-10-136,313 lbs0 lbs36,313 lbs
8Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
9Hydrogen sulfide7783-06-431,678 lbs0 lbs31,678 lbs
10Cumene98-82-831,165 lbs0 lbs31,165 lbs
11Molybdenum trioxide1313-27-527,245 lbs3,165 lbs30,410 lbs
12Vinyl acetate108-05-422,306 lbs0 lbs22,306 lbs
13Acetaldehyde75-07-012,256 lbs0 lbs12,256 lbs
14Xylene (mixed isomers)1330-20-711,256 lbs0 lbs11,256 lbs
15Nickel compoundsN4959,885 lbs1,148 lbs11,033 lbs
16Benzene71-43-210,536 lbs0 lbs10,536 lbs
17Chlorine7782-50-510,430 lbs0 lbs10,430 lbs
18Styrene100-42-57,344 lbs0 lbs7,344 lbs
19Cobalt compoundsN0963,961 lbs866 lbs4,827 lbs
20Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
21Acrylic acid79-10-73,532 lbs0 lbs3,532 lbs
22Methyl methacrylate80-62-63,052 lbs0 lbs3,052 lbs
23Ethylene oxide75-21-82,222 lbs0 lbs2,222 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
30n-Butyl alcohol71-36-31,165 lbs0 lbs1,165 lbs
31Diphenylamine122-39-4997 lbs0 lbs997 lbs
321,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
33Toluene108-88-3807 lbs0 lbs807 lbs
34Nickel And Nickel CompoundsN495702 lbs21 lbs723 lbs
35Manganese7439-96-5511 lbs0 lbs511 lbs
36Propylene oxide75-56-9385 lbs0 lbs385 lbs
37Cyclohexane110-82-7377 lbs0 lbs377 lbs
38Cobalt And Cobalt CompoundsN096300 lbs5 lbs305 lbs
39Formaldehyde50-00-046 lbs102 lbs148 lbs
40Copper compoundsN100132 lbs6 lbs138 lbs
41Ethylbenzene100-41-494 lbs0 lbs94 lbs
42Chloromethane74-87-351 lbs0 lbs51 lbs
43Chromium7440-47-345 lbs0 lbs45 lbs
44N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
45Naphthalene91-20-333 lbs0 lbs33 lbs
46Ethylene glycol107-21-115 lbs0 lbs15 lbs
47Butyl acrylate141-32-25 lbs0 lbs5 lbs
48Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
49Certain glycol ethersN2303 lbs0 lbs3 lbs
50Maleic anhydride108-31-61 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Aluminum oxide (fibrous forms), n-Hexane, Ethylene, 1,2,4-Trimethylbenzene

View the full list of 41 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (41 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-111,092 lbs0 lbs431,034 lbs
2Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
3n-Hexane110-54-3116,540 lbs0 lbs117,040 lbs
4Ethylene74-85-172,650 lbs0 lbs72,650 lbs
51,2,4-Trimethylbenzene95-63-674 lbs0 lbs43,988 lbs
6Molybdenum trioxide1313-27-52,612 lbs474 lbs33,276 lbs
7Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
8Toluene108-88-316 lbs0 lbs13,930 lbs
9Xylene (mixed isomers)1330-20-739 lbs0 lbs13,258 lbs
10Nonylphenol EthoxylatesN5350 lbs0 lbs11,809 lbs
11Propylene115-07-110,535 lbs0 lbs10,535 lbs
12Ammonia7664-41-78,692 lbs0 lbs9,344 lbs
13Nickel compoundsN4951,017 lbs108 lbs7,851 lbs
14Vinyl acetate108-05-42,418 lbs0 lbs7,117 lbs
15Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
16Cumene98-82-82,616 lbs0 lbs5,324 lbs
17Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0900 lbs0 lbs5,055 lbs
18Hydroquinone123-31-94,862 lbs0 lbs4,862 lbs
19Naphthalene91-20-30 lbs0 lbs4,040 lbs
20Methyl isobutyl ketone108-10-13,997 lbs0 lbs3,997 lbs
21Hydrogen sulfide7783-06-43,596 lbs0 lbs3,596 lbs
22sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
23Ethylene oxide75-21-8483 lbs0 lbs3,183 lbs
24Cobalt compoundsN096455 lbs36 lbs2,816 lbs
25Ethylbenzene100-41-44 lbs0 lbs2,630 lbs
26n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
27Ethylene glycol107-21-13 lbs0 lbs1,147 lbs
28Acetaldehyde75-07-0494 lbs0 lbs1,132 lbs
29Benzene71-43-21,090 lbs0 lbs1,090 lbs
30Chlorine7782-50-5961 lbs0 lbs961 lbs
31Formaldehyde50-00-03 lbs0 lbs513 lbs
32Maleic anhydride108-31-60 lbs0 lbs400 lbs
33Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
34Cyclohexane110-82-724 lbs0 lbs315 lbs
35Acrylic acid79-10-7186 lbs0 lbs192 lbs
36Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
37Styrene100-42-5116 lbs0 lbs116 lbs
38Diphenylamine122-39-4103 lbs0 lbs103 lbs
39Propylene oxide75-56-961 lbs0 lbs61 lbs
40Phosgene75-44-527 lbs0 lbs27 lbs
41Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs

Explore More Properties