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
1640 DUNAWAY ST HOUSTON 77015
Building Size
1,903 sqft
Total structure area from HCAD building records.
Elevation
17.79 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
Moderate
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
Moderate
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: 7.79 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.

  • This property is in a high-risk flood zone. Flood insurance is required for mortgages.
  • Consider flood mitigation measures like elevated utilities and flood vents.
  • 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 79% 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)
739 thousand lbs
Extremely High
113.3x more than typical Houston property
≈ 37 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)
739 thousand lbs
Extremely High
153.3x 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)
159 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)739,405 lbs739,246 lbs159 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)90,345 lbs70,395 lbs39 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 79% 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 25% most polluted).

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

1,3-Butadiene, Ethylene, n-Hexane, Methanol, Ammonia

View the full list of 22 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (22 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
11,3-Butadiene106-99-0203,018 lbs0 lbs203,018 lbs
2Ethylene74-85-1165,454 lbs0 lbs165,454 lbs
3n-Hexane110-54-3121,300 lbs9 lbs121,380 lbs
4Methanol67-56-165,798 lbs0 lbs65,798 lbs
5Ammonia7664-41-764,815 lbs0 lbs64,815 lbs
6Xylene (mixed isomers)1330-20-729,092 lbs18 lbs29,181 lbs
7Toluene108-88-326,634 lbs17 lbs26,738 lbs
8Benzene71-43-220,895 lbs9 lbs20,922 lbs
9Cyclohexane110-82-714,656 lbs0 lbs14,656 lbs
10Isoprene78-79-513,272 lbs0 lbs13,272 lbs
11Ethylbenzene100-41-47,645 lbs16 lbs7,698 lbs
12Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-03,066 lbs0 lbs3,066 lbs
131,2,4-Trimethylbenzene95-63-62,730 lbs0 lbs2,801 lbs
14Nickel7440-02-0376 lbs1 lbs376 lbs
15Cumene98-82-8169 lbs0 lbs174 lbs
16Naphthalene91-20-3144 lbs0 lbs149 lbs
17Propylene115-07-1126 lbs0 lbs126 lbs
18Zinc compoundsN9820 lbs65 lbs65 lbs
19Anthracene120-12-731 lbs0 lbs31 lbs
20Polycyclic aromatic compoundsN59023 lbs0 lbs23 lbs
21Lead compoundsN4202 lbs11 lbs14 lbs
22Lead And Lead CompoundsN4200 lbs12 lbs12 lbs

Top chemicals released near this property (2024 only):

1,3-Butadiene, Zinc compounds, Ethylene, Ammonia, n-Hexane

View the full list of 18 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (18 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
11,3-Butadiene106-99-032,375 lbs0 lbs32,375 lbs
2Zinc compoundsN9820 lbs5 lbs18,755 lbs
3Ethylene74-85-114,466 lbs0 lbs14,466 lbs
4Ammonia7664-41-76,881 lbs0 lbs6,881 lbs
5n-Hexane110-54-36,435 lbs0 lbs6,506 lbs
6Xylene (mixed isomers)1330-20-73,231 lbs8 lbs3,311 lbs
7Toluene108-88-32,355 lbs8 lbs2,451 lbs
8Isoprene78-79-52,371 lbs0 lbs2,371 lbs
9Benzene71-43-21,538 lbs2 lbs1,561 lbs
10Lead And Lead CompoundsN4200 lbs5 lbs788 lbs
11Cyclohexane110-82-7294 lbs0 lbs294 lbs
121,2,4-Trimethylbenzene95-63-6114 lbs0 lbs185 lbs
13Ethylbenzene100-41-4125 lbs8 lbs170 lbs
14Nickel7440-02-090 lbs0 lbs98 lbs
15Propylene115-07-183 lbs0 lbs83 lbs
16Cumene98-82-825 lbs0 lbs30 lbs
17Naphthalene91-20-311 lbs0 lbs17 lbs
18Lead compoundsN4200 lbs3 lbs3 lbs

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