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
7401 NAVIGATION BLVD HOUSTON 77011
Elevation
21.54 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
Vacant lot (no building data). No structure to calculate damage for.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Vacant lot (no building data). No structure to calculate damage for.
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: 11.54 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 75% 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)
492 thousand lbs
Very High
75.4x more than typical Houston property
≈ 25 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)
492 thousand lbs
Extremely High
101.9x 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)
623 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)492,136 lbs491,513 lbs623 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)679,032 lbs52,748 lbs22 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 75% 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):

Zinc compounds, n-Hexane, Xylene (mixed isomers), Nitric acid, Toluene

View the full list of 32 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (32 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Zinc compoundsN982176,619 lbs26 lbs176,645 lbs
2n-Hexane110-54-3125,432 lbs0 lbs125,432 lbs
3Xylene (mixed isomers)1330-20-766,977 lbs0 lbs66,977 lbs
4Nitric acid7697-37-235,886 lbs0 lbs35,886 lbs
5Toluene108-88-331,681 lbs0 lbs31,681 lbs
6Ethylene glycol107-21-115,545 lbs0 lbs15,545 lbs
71,4-Dioxane123-91-110,779 lbs0 lbs10,779 lbs
81,2,4-Trimethylbenzene95-63-68,648 lbs0 lbs8,648 lbs
9Manganese7439-96-55,230 lbs359 lbs5,589 lbs
10Lead compoundsN4203,031 lbs0 lbs3,031 lbs
11Cyclohexane110-82-72,389 lbs0 lbs2,389 lbs
12Copper compoundsN1002,021 lbs0 lbs2,021 lbs
13Phthalic anhydride85-44-92,000 lbs0 lbs2,000 lbs
14Lead And Lead CompoundsN4201,553 lbs0 lbs1,553 lbs
15Propylene115-07-1810 lbs0 lbs810 lbs
16Polycyclic aromatic compoundsN590749 lbs1 lbs758 lbs
17Lead7439-92-1225 lbs215 lbs439 lbs
18Certain glycol ethersN230402 lbs0 lbs402 lbs
19Chloroacetic acid79-11-8330 lbs0 lbs330 lbs
20Methyl methacrylate80-62-6265 lbs0 lbs265 lbs
21Methanol67-56-1255 lbs0 lbs255 lbs
22Ethylbenzene100-41-4217 lbs0 lbs218 lbs
23Styrene100-42-5162 lbs0 lbs163 lbs
24Naphthalene91-20-3117 lbs0 lbs118 lbs
25Chromium compounds (except for chromite ore mined in the Transvaal Region)N09086 lbs0 lbs86 lbs
26Nickel7440-02-036 lbs4 lbs39 lbs
27Nickel compoundsN49522 lbs0 lbs22 lbs
28Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09019 lbs0 lbs19 lbs
29Benzo[g,h,i]perylene191-24-215 lbs0 lbs15 lbs
30Chromium7440-47-33 lbs12 lbs15 lbs
31Copper And Copper CompoundsN10010 lbs0 lbs10 lbs
32Copper7440-50-80 lbs6 lbs6 lbs

Top chemicals released near this property (2024 only):

1,4-Dioxane, Ethylene glycol, Methanol, Zinc compounds, n-Hexane

View the full list of 15 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (15 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
11,4-Dioxane123-91-1328 lbs0 lbs396,851 lbs
2Ethylene glycol107-21-15,094 lbs0 lbs177,549 lbs
3Methanol67-56-10 lbs0 lbs23,673 lbs
4Zinc compoundsN9829,014 lbs0 lbs20,571 lbs
5n-Hexane110-54-312,290 lbs0 lbs12,290 lbs
6Xylene (mixed isomers)1330-20-711,930 lbs0 lbs11,930 lbs
7Toluene108-88-311,886 lbs0 lbs11,886 lbs
8Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0906 lbs0 lbs11,416 lbs
9Nitric acid7697-37-2750 lbs0 lbs9,441 lbs
10Lead And Lead CompoundsN420161 lbs0 lbs2,050 lbs
111,2,4-Trimethylbenzene95-63-61,210 lbs0 lbs1,210 lbs
12Lead7439-92-120 lbs22 lbs87 lbs
13Polycyclic aromatic compoundsN59040 lbs0 lbs58 lbs
14Methyl methacrylate80-62-610 lbs0 lbs10 lbs
15Chloroacetic acid79-11-810 lbs0 lbs10 lbs

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