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
4927 COSBY ST HOUSTON 77021
Building Size
1,974 sqft
Total structure area from HCAD building records.
Elevation
37.67 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: 27.67 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 59% 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)
45 thousand lbs
Above Typical
6.9x more than typical Houston property
≈ 2 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)
45 thousand lbs
Above Typical
9.3x 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)
0 lbs
Low
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)44,968 lbs44,968 lbs0 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)52,884 lbs2,089 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 59% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 40-49th percentile (slightly higher than average).

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

N-Methyl-2-pyrrolidone, Toluene, Xylene (mixed isomers), Certain glycol ethers, 1,2,4-Trimethylbenzene

View the full list of 21 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (21 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1N-Methyl-2-pyrrolidone872-50-437,616 lbs0 lbs37,616 lbs
2Toluene108-88-31,951 lbs0 lbs1,951 lbs
3Xylene (mixed isomers)1330-20-71,940 lbs0 lbs1,940 lbs
4Certain glycol ethersN2301,884 lbs0 lbs1,884 lbs
51,2,4-Trimethylbenzene95-63-6838 lbs0 lbs838 lbs
6n-Hexane110-54-3291 lbs0 lbs291 lbs
7Naphthalene91-20-3282 lbs0 lbs282 lbs
8Zinc compoundsN98238 lbs0 lbs38 lbs
9Cumene98-82-832 lbs0 lbs32 lbs
10Ethylene glycol107-21-129 lbs0 lbs29 lbs
11Nitric acid7697-37-224 lbs0 lbs24 lbs
12Hydrogen fluoride7664-39-312 lbs0 lbs12 lbs
13Boron trifluoride7637-07-210 lbs0 lbs10 lbs
14Nickel compoundsN4958 lbs0 lbs8 lbs
15Cyanide compoundsN1064 lbs0 lbs4 lbs
16Copper compoundsN1002 lbs0 lbs2 lbs
17Nickel And Nickel CompoundsN4952 lbs0 lbs2 lbs
18Chromium compounds (except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs2 lbs
19Lead7439-92-11 lbs0 lbs1 lbs
20Manganese And Manganese CompoundsN4501 lbs0 lbs1 lbs
21Polycyclic aromatic compoundsN5901 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Zinc compounds, Nitric acid, Nickel compounds, N-Methyl-2-pyrrolidone, Cyanide compounds

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)
1Zinc compoundsN9823 lbs0 lbs37,856 lbs
2Nitric acid7697-37-23 lbs0 lbs8,478 lbs
3Nickel compoundsN4951 lbs0 lbs3,119 lbs
4N-Methyl-2-pyrrolidone872-50-42,081 lbs0 lbs2,081 lbs
5Cyanide compoundsN1061 lbs0 lbs1,233 lbs
6Mercury And Mercury CompoundsN4580 lbs0 lbs112 lbs
7Lead And Lead CompoundsN4200 lbs0 lbs5 lbs

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