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
3809 DARLING AVE PASADENA 77503
Building Size
1,898 sqft
Total structure area from HCAD building records.
Elevation
28.73 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: 18.73 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)
3.03 million lbs
Extremely High
464.2x more than typical Houston property
≈ 151 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)
1.97 million lbs
Extremely High
408.8x 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)3,028,708 lbs1,971,570 lbs1,057,138 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)331,511 lbs223,822 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 46 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (46 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
2Cumene98-82-8518,059 lbs11 lbs518,071 lbs
3Propylene115-07-1288,871 lbs0 lbs288,871 lbs
4Acetophenone98-86-2206,492 lbs3,645 lbs210,136 lbs
5Methanol67-56-1180,453 lbs7,563 lbs188,016 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)1330-20-748,626 lbs33 lbs48,668 lbs
10Ethylene74-85-140,872 lbs0 lbs40,872 lbs
111,2,4-Trimethylbenzene95-63-640,441 lbs105 lbs40,549 lbs
12Toluene108-88-332,691 lbs27 lbs32,727 lbs
13n-Hexane110-54-330,503 lbs170 lbs30,674 lbs
14Isobutyraldehyde78-84-228,404 lbs0 lbs28,404 lbs
15Ammonia7664-41-720,960 lbs2,681 lbs23,641 lbs
16Butyraldehyde123-72-823,130 lbs0 lbs23,130 lbs
17Boron trifluoride7637-07-214,843 lbs0 lbs14,843 lbs
18Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-013,680 lbs0 lbs13,680 lbs
19Phenol108-95-212,719 lbs4 lbs12,723 lbs
20Ethylbenzene100-41-46,973 lbs22 lbs6,997 lbs
21Chlorine7782-50-56,477 lbs0 lbs6,477 lbs
22Zinc compoundsN9825,277 lbs0 lbs5,277 lbs
23n-Butyl alcohol71-36-34,032 lbs0 lbs4,032 lbs
24Phthalic anhydride85-44-93,545 lbs0 lbs3,545 lbs
25o-Cresol95-48-71,985 lbs0 lbs1,985 lbs
26Ethylene glycol107-21-11,820 lbs0 lbs1,820 lbs
27Maleic anhydride108-31-61,686 lbs0 lbs1,686 lbs
28o-Xylene95-47-61,330 lbs0 lbs1,330 lbs
29Cyclohexane110-82-71,073 lbs0 lbs1,073 lbs
30Manganese compoundsN4501,064 lbs0 lbs1,064 lbs
31Formaldehyde50-00-01,061 lbs0 lbs1,061 lbs
32Naphthalene91-20-31,012 lbs21 lbs1,034 lbs
331,3-Butadiene106-99-0938 lbs0 lbs938 lbs
34Lead compoundsN420288 lbs22 lbs309 lbs
35Manganese And Manganese CompoundsN450309 lbs0 lbs309 lbs
361,2-Dibromoethane106-93-4133 lbs0 lbs133 lbs
371,2-Dichloroethane107-06-2127 lbs0 lbs127 lbs
38Diphenylamine122-39-4126 lbs0 lbs126 lbs
39Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
40Lead And Lead CompoundsN42055 lbs22 lbs78 lbs
41Chromium7440-47-30 lbs33 lbs33 lbs
42Nickel7440-02-00 lbs31 lbs31 lbs
43Certain glycol ethersN23012 lbs0 lbs12 lbs
44Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
45Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
46Mercury 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 38 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (38 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
2Propylene115-07-157,757 lbs0 lbs57,757 lbs
3Cumene98-82-835,001 lbs0 lbs35,140 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
8Ammonia7664-41-76,269 lbs0 lbs13,983 lbs
9Vinyl chloride75-01-413,207 lbs1 lbs13,208 lbs
10Acetaldehyde75-07-08,300 lbs380 lbs8,680 lbs
11Phenol108-95-24,324 lbs0 lbs5,676 lbs
121,2,4-Trimethylbenzene95-63-64,078 lbs0 lbs4,777 lbs
13Isobutyraldehyde78-84-24,431 lbs0 lbs4,431 lbs
14n-Hexane110-54-34,280 lbs0 lbs4,280 lbs
15Xylene (mixed isomers)1330-20-73,736 lbs5 lbs3,880 lbs
16Toluene108-88-32,900 lbs3 lbs2,903 lbs
17Butyraldehyde123-72-82,507 lbs0 lbs2,507 lbs
18Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
19o-Cresol95-48-788 lbs0 lbs1,122 lbs
20Formaldehyde50-00-099 lbs0 lbs978 lbs
21n-Butyl alcohol71-36-3638 lbs0 lbs638 lbs
22Ethylene glycol107-21-1559 lbs0 lbs559 lbs
23Chlorine7782-50-5487 lbs0 lbs487 lbs
24Ethylbenzene100-41-4427 lbs3 lbs430 lbs
25Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0395 lbs0 lbs395 lbs
26Zinc compoundsN982323 lbs0 lbs323 lbs
271,3-Butadiene106-99-0295 lbs0 lbs295 lbs
28Maleic anhydride108-31-6132 lbs0 lbs281 lbs
29Cyclohexane110-82-7232 lbs0 lbs232 lbs
30Naphthalene91-20-3132 lbs1 lbs133 lbs
31Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
32Lead And Lead CompoundsN4208 lbs1 lbs70 lbs
33Diphenylamine122-39-423 lbs0 lbs23 lbs
34Chromium7440-47-30 lbs2 lbs8 lbs
35Nickel7440-02-00 lbs2 lbs6 lbs
361,2-Dibromoethane106-93-44 lbs0 lbs4 lbs
37Certain glycol ethersN2301 lbs0 lbs1 lbs
38Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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