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
933 VIVIAN AVE PASADENA 77506
Building Size
1,824 sqft
Total structure area from HCAD building records.
Elevation
28.99 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: 18.99 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 79% 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)
691 thousand lbs
Extremely High
105.9x more than typical Houston property
≈ 35 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)
690 thousand lbs
Extremely High
143.1x 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)
463 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)690,724 lbs690,261 lbs463 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)118,786 lbs83,131 lbs15 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 79% 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):

Methanol, Ammonia, Vinyl acetate, Xylene (mixed isomers), Ethylene

View the full list of 41 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (41 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Methanol67-56-1270,817 lbs0 lbs270,817 lbs
2Ammonia7664-41-792,863 lbs0 lbs92,863 lbs
3Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
4Xylene (mixed isomers)1330-20-745,323 lbs33 lbs45,365 lbs
5Ethylene74-85-140,183 lbs0 lbs40,183 lbs
61,2,4-Trimethylbenzene95-63-636,587 lbs105 lbs36,695 lbs
7Toluene108-88-329,713 lbs27 lbs29,749 lbs
8n-Hexane110-54-320,905 lbs170 lbs21,076 lbs
9Boron trifluoride7637-07-214,388 lbs0 lbs14,388 lbs
10Benzene71-43-211,221 lbs24 lbs11,247 lbs
11Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
12Chlorine7782-50-56,383 lbs0 lbs6,383 lbs
13Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
14Ethylbenzene100-41-45,951 lbs22 lbs5,975 lbs
15Phenol108-95-25,078 lbs0 lbs5,078 lbs
16Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-05,066 lbs0 lbs5,066 lbs
17Zinc compoundsN9824,126 lbs0 lbs4,126 lbs
18Formaldehyde50-00-03,141 lbs0 lbs3,141 lbs
19Ethylene glycol107-21-12,254 lbs0 lbs2,254 lbs
20Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
21Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
22o-Cresol95-48-71,585 lbs0 lbs1,585 lbs
23Cumene98-82-81,513 lbs10 lbs1,524 lbs
24Formic acid64-18-61,406 lbs0 lbs1,406 lbs
25Maleic anhydride108-31-61,009 lbs0 lbs1,009 lbs
26Cyclohexane110-82-7995 lbs0 lbs995 lbs
27Naphthalene91-20-3935 lbs21 lbs957 lbs
281,3-Butadiene106-99-0312 lbs0 lbs312 lbs
29Diethanolamine111-42-2205 lbs0 lbs205 lbs
30Nickel7440-02-0120 lbs0 lbs120 lbs
31Diphenylamine122-39-4118 lbs0 lbs118 lbs
32Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
33Manganese7439-96-570 lbs0 lbs70 lbs
34Chromium7440-47-340 lbs0 lbs40 lbs
35Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
36Lead compoundsN4201 lbs22 lbs22 lbs
37Certain glycol ethersN23012 lbs0 lbs12 lbs
38Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
39Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
40Piperonyl butoxide51-03-64 lbs0 lbs4 lbs
41Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Ethylene, Ammonia, Vinyl acetate, 1,2,4-Trimethylbenzene

View the full list of 36 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (36 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-115,808 lbs0 lbs42,599 lbs
2Ethylene74-85-130,650 lbs0 lbs30,650 lbs
3Ammonia7664-41-76,678 lbs0 lbs7,432 lbs
4Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
51,2,4-Trimethylbenzene95-63-64,000 lbs0 lbs4,520 lbs
6n-Hexane110-54-34,280 lbs0 lbs4,280 lbs
7Xylene (mixed isomers)1330-20-73,675 lbs5 lbs3,785 lbs
8Phenol108-95-22,206 lbs0 lbs3,579 lbs
9Formaldehyde50-00-0354 lbs0 lbs3,326 lbs
10Toluene108-88-32,900 lbs3 lbs2,903 lbs
11Formic acid64-18-6189 lbs0 lbs1,968 lbs
12Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
13Benzene71-43-21,130 lbs2 lbs1,132 lbs
14o-Cresol95-48-788 lbs0 lbs1,122 lbs
15Dimethylamine124-40-3864 lbs0 lbs884 lbs
16Chlorine7782-50-5487 lbs0 lbs487 lbs
17Ethylbenzene100-41-4427 lbs3 lbs430 lbs
18Zinc compoundsN982323 lbs0 lbs323 lbs
191,3-Butadiene106-99-0295 lbs0 lbs295 lbs
20Acrylonitrile107-13-1278 lbs0 lbs294 lbs
21Cumene98-82-8183 lbs0 lbs287 lbs
22Maleic anhydride108-31-6132 lbs0 lbs281 lbs
23Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0265 lbs0 lbs265 lbs
24Propylene oxide75-56-9255 lbs0 lbs255 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
28Ethylene glycol107-21-130 lbs0 lbs50 lbs
29Acetaldehyde75-07-045 lbs0 lbs45 lbs
30Manganese7439-96-530 lbs0 lbs30 lbs
31Chromium7440-47-325 lbs0 lbs25 lbs
32Nickel7440-02-024 lbs0 lbs24 lbs
33Diphenylamine122-39-423 lbs0 lbs23 lbs
34Lead And Lead CompoundsN4201 lbs1 lbs1 lbs
35Certain glycol ethersN2301 lbs0 lbs1 lbs
36Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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