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
9721 STEDMAN HOUSTON 77029
Building Size
1,721 sqft
Total structure area from HCAD building records.
Elevation
31.52 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: 21.52 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
Moderate
Higher pollution than 73% 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)
349 thousand lbs
Very High
53.5x more than typical Houston property
≈ 17 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)
349 thousand lbs
Very High
72.3x 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)
29 lbs
Above Typical
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)348,805 lbs348,775 lbs29 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)54,437 lbs49,980 lbs1 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 73% 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):

Ammonia, Xylene (mixed isomers), Hydrogen sulfide, Manganese, Methanol

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)
1Ammonia7664-41-7295,214 lbs0 lbs295,214 lbs
2Xylene (mixed isomers)1330-20-732,641 lbs0 lbs32,641 lbs
3Hydrogen sulfide7783-06-46,912 lbs0 lbs6,912 lbs
4Manganese7439-96-54,228 lbs0 lbs4,228 lbs
5Methanol67-56-13,036 lbs0 lbs3,036 lbs
6Polycyclic aromatic compoundsN5901,867 lbs2 lbs1,876 lbs
7Zinc compoundsN9821,466 lbs26 lbs1,492 lbs
8Ethylbenzene100-41-4917 lbs0 lbs918 lbs
9Propylene115-07-1483 lbs0 lbs483 lbs
10Certain glycol ethersN230402 lbs0 lbs402 lbs
11Chloroacetic acid79-11-8330 lbs0 lbs330 lbs
12Methyl methacrylate80-62-6265 lbs0 lbs265 lbs
13Benzo[g,h,i]perylene191-24-2236 lbs0 lbs236 lbs
14Lead7439-92-1229 lbs1 lbs230 lbs
15Naphthalene91-20-3184 lbs0 lbs185 lbs
16Styrene100-42-5162 lbs0 lbs163 lbs
171,2,4-Trimethylbenzene95-63-6125 lbs0 lbs125 lbs
18Nickel7440-02-035 lbs0 lbs35 lbs
19Nitric acid7697-37-230 lbs0 lbs30 lbs
20Mercury7439-97-612 lbs0 lbs12 lbs
21Copper compoundsN1001 lbs1 lbs2 lbs
22Dioxin and dioxin-like compoundsN1501 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Ammonia, Zinc compounds, Lead, Polycyclic aromatic compounds, Benzo[g,h,i]perylene

View the full list of 7 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (7 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ammonia7664-41-749,429 lbs0 lbs52,907 lbs
2Zinc compoundsN982132 lbs0 lbs1,075 lbs
3Lead7439-92-1228 lbs1 lbs234 lbs
4Polycyclic aromatic compoundsN590149 lbs0 lbs177 lbs
5Benzo[g,h,i]perylene191-24-221 lbs0 lbs24 lbs
6Chloroacetic acid79-11-810 lbs0 lbs10 lbs
7Methyl methacrylate80-62-610 lbs0 lbs10 lbs

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