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
503 GARDEN WAY LN PASADENA 77503
Building Size
1,723 sqft
Total structure area from HCAD building records.
Elevation
29.64 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: 19.64 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 86% 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)
2.91 million lbs
Extremely High
446.0x more than typical Houston property
≈ 145 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)
1.85 million lbs
Extremely High
384.2x 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)
1.06 million lbs
Extremely 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)2,909,753 lbs1,852,616 lbs1,057,138 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)316,895 lbs209,517 lbs73,522 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 86% 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):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Cumene, Propylene, Acetophenone, Methanol

View the full list of 39 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (39 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs1,038,744 lbs1,038,744 lbs
2Cumene98-82-8517,623 lbs11 lbs517,635 lbs
3Propylene115-07-1261,006 lbs0 lbs261,006 lbs
4Acetophenone98-86-2206,492 lbs3,645 lbs210,136 lbs
5Methanol67-56-1183,529 lbs7,563 lbs191,092 lbs
6Benzene71-43-2171,685 lbs27 lbs171,714 lbs
7Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
8Acetaldehyde75-07-092,740 lbs3,956 lbs96,696 lbs
9Xylene (mixed isomers)1330-20-745,323 lbs33 lbs45,365 lbs
10Ethylene74-85-140,872 lbs0 lbs40,872 lbs
111,2,4-Trimethylbenzene95-63-636,587 lbs105 lbs36,695 lbs
12n-Hexane110-54-330,503 lbs170 lbs30,674 lbs
13Toluene108-88-329,713 lbs27 lbs29,749 lbs
14Boron trifluoride7637-07-214,388 lbs0 lbs14,388 lbs
15Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-013,465 lbs0 lbs13,465 lbs
16Phenol108-95-212,634 lbs4 lbs12,638 lbs
17Ammonia7664-41-74,450 lbs2,681 lbs7,131 lbs
18Chlorine7782-50-56,383 lbs0 lbs6,383 lbs
19Ethylbenzene100-41-45,951 lbs22 lbs5,975 lbs
20Zinc compoundsN9824,126 lbs0 lbs4,126 lbs
21Ethylene glycol107-21-11,956 lbs0 lbs1,956 lbs
22o-Cresol95-48-71,585 lbs0 lbs1,585 lbs
23Cyclohexane110-82-71,073 lbs0 lbs1,073 lbs
24Maleic anhydride108-31-61,009 lbs0 lbs1,009 lbs
25Naphthalene91-20-3935 lbs21 lbs957 lbs
26Formaldehyde50-00-0857 lbs0 lbs857 lbs
271,3-Butadiene106-99-0312 lbs0 lbs312 lbs
28Diethanolamine111-42-2205 lbs0 lbs205 lbs
29Diphenylamine122-39-4118 lbs0 lbs118 lbs
30Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
31Chromium7440-47-30 lbs33 lbs33 lbs
32Nickel7440-02-00 lbs31 lbs31 lbs
33Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
34Lead compoundsN4201 lbs22 lbs22 lbs
35Certain glycol ethersN23012 lbs0 lbs12 lbs
36Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
37Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
38Piperonyl butoxide51-03-64 lbs0 lbs4 lbs
39Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Propylene, Cumene, Ethylene, Methanol

View the full list of 34 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (34 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs72,435 lbs72,435 lbs
2Propylene115-07-153,581 lbs0 lbs53,581 lbs
3Cumene98-82-834,975 lbs0 lbs35,079 lbs
4Ethylene74-85-131,339 lbs0 lbs31,339 lbs
5Methanol67-56-13,330 lbs336 lbs25,653 lbs
6Benzene71-43-219,530 lbs2 lbs19,533 lbs
7Acetophenone98-86-217,719 lbs350 lbs18,069 lbs
8Vinyl chloride75-01-413,207 lbs1 lbs13,208 lbs
9Ammonia7664-41-74,450 lbs0 lbs12,164 lbs
10Acetaldehyde75-07-08,300 lbs380 lbs8,680 lbs
11Phenol108-95-24,324 lbs0 lbs5,676 lbs
121,2,4-Trimethylbenzene95-63-64,000 lbs0 lbs4,520 lbs
13n-Hexane110-54-34,280 lbs0 lbs4,280 lbs
14Xylene (mixed isomers)1330-20-73,675 lbs5 lbs3,785 lbs
15Toluene108-88-32,900 lbs3 lbs2,903 lbs
16Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
17o-Cresol95-48-788 lbs0 lbs1,122 lbs
18Formaldehyde50-00-099 lbs0 lbs978 lbs
19Chlorine7782-50-5487 lbs0 lbs487 lbs
20Ethylbenzene100-41-4427 lbs3 lbs430 lbs
21Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0395 lbs0 lbs395 lbs
22Zinc compoundsN982323 lbs0 lbs323 lbs
231,3-Butadiene106-99-0295 lbs0 lbs295 lbs
24Maleic anhydride108-31-6132 lbs0 lbs281 lbs
25Cyclohexane110-82-7232 lbs0 lbs232 lbs
26Naphthalene91-20-3132 lbs1 lbs133 lbs
27Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
28Diphenylamine122-39-423 lbs0 lbs23 lbs
29Chromium7440-47-30 lbs2 lbs8 lbs
30Nickel7440-02-00 lbs2 lbs6 lbs
31Lead And Lead CompoundsN4201 lbs1 lbs1 lbs
32Certain glycol ethersN2301 lbs0 lbs1 lbs
33Ethylene glycol107-21-11 lbs0 lbs1 lbs
34Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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