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
918 VIVIAN AVE PASADENA 77506
Building Size
1,275 sqft
Total structure area from HCAD building records.
Elevation
28.35 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: 18.35 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)
2.67 million lbs
Extremely High
409.1x more than typical Houston property
≈ 133 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)
2.67 million lbs
Extremely High
553.3x 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)
633 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)2,669,024 lbs2,668,391 lbs633 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)142,714 lbs105,925 lbs33 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):

n-Hexane, Propylene, Methanol, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen cyanide

View the full list of 48 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (48 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-3666,400 lbs170 lbs666,983 lbs
2Propylene115-07-1271,630 lbs0 lbs271,630 lbs
3Methanol67-56-1270,817 lbs0 lbs270,817 lbs
4Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9250,209 lbs0 lbs250,209 lbs
5Hydrogen cyanide74-90-8213,734 lbs0 lbs213,734 lbs
6Xylene (mixed isomers)1330-20-7205,400 lbs129 lbs207,868 lbs
7Toluene108-88-3136,236 lbs43 lbs137,145 lbs
8Ethylene74-85-1118,637 lbs0 lbs118,637 lbs
9Ammonia7664-41-7115,868 lbs0 lbs115,868 lbs
10Benzene71-43-286,351 lbs44 lbs86,950 lbs
11Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
121,2,4-Trimethylbenzene95-63-643,913 lbs105 lbs44,281 lbs
13Ethylbenzene100-41-437,971 lbs61 lbs38,626 lbs
14Hydrogen sulfide7783-06-437,772 lbs0 lbs37,773 lbs
151,3-Butadiene106-99-029,382 lbs0 lbs29,383 lbs
16Naphthalene91-20-316,186 lbs21 lbs17,530 lbs
17Cyclohexane110-82-715,071 lbs0 lbs15,830 lbs
18Boron trifluoride7637-07-214,388 lbs0 lbs14,388 lbs
19Cumene98-82-88,626 lbs10 lbs8,819 lbs
20Ethylene glycol107-21-17,509 lbs0 lbs7,509 lbs
21Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
22Chlorine7782-50-56,651 lbs0 lbs6,651 lbs
23Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
24Biphenyl92-52-44,816 lbs0 lbs5,138 lbs
25Phenol108-95-25,078 lbs0 lbs5,078 lbs
26Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-05,066 lbs0 lbs5,066 lbs
27Zinc compoundsN9824,126 lbs0 lbs4,126 lbs
28Formaldehyde50-00-03,141 lbs0 lbs3,141 lbs
29Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
30Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
31o-Cresol95-48-71,585 lbs0 lbs1,585 lbs
32Formic acid64-18-61,406 lbs0 lbs1,406 lbs
33Maleic anhydride108-31-61,009 lbs0 lbs1,009 lbs
34Diethanolamine111-42-2805 lbs0 lbs805 lbs
35Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
36Nickel7440-02-0120 lbs0 lbs120 lbs
37Diphenylamine122-39-4118 lbs0 lbs118 lbs
38Certain glycol ethersN23092 lbs0 lbs92 lbs
39Manganese7439-96-570 lbs0 lbs70 lbs
40C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
41Chromium7440-47-340 lbs0 lbs40 lbs
42Mercury7439-97-630 lbs0 lbs30 lbs
43Polycyclic aromatic compoundsN59024 lbs2 lbs26 lbs
44Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
45Lead compoundsN4201 lbs22 lbs22 lbs
46Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
47Benzo[g,h,i]perylene191-24-23 lbs0 lbs3 lbs
48Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Ethylene, Xylene (mixed isomers), Ammonia, n-Hexane

View the full list of 39 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (39 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-115,808 lbs0 lbs42,599 lbs
2Ethylene74-85-131,171 lbs0 lbs31,171 lbs
3Xylene (mixed isomers)1330-20-78,774 lbs15 lbs9,199 lbs
4Ammonia7664-41-77,948 lbs0 lbs8,735 lbs
5n-Hexane110-54-37,068 lbs0 lbs7,101 lbs
6Toluene108-88-36,121 lbs5 lbs6,175 lbs
7Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
81,2,4-Trimethylbenzene95-63-64,962 lbs0 lbs5,620 lbs
9Benzene71-43-24,302 lbs4 lbs4,399 lbs
10Phenol108-95-22,206 lbs0 lbs3,579 lbs
11Formaldehyde50-00-0354 lbs0 lbs3,326 lbs
12Formic acid64-18-6189 lbs0 lbs1,968 lbs
13Ethylbenzene100-41-41,688 lbs7 lbs1,733 lbs
141,3-Butadiene106-99-01,251 lbs0 lbs1,251 lbs
15Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
16o-Cresol95-48-788 lbs0 lbs1,122 lbs
17Propylene115-07-11,119 lbs0 lbs1,119 lbs
18Hydrogen sulfide7783-06-4923 lbs0 lbs923 lbs
19Dimethylamine124-40-3864 lbs0 lbs884 lbs
20Naphthalene91-20-3728 lbs1 lbs747 lbs
21Ethylene glycol107-21-1530 lbs0 lbs550 lbs
22Cumene98-82-8421 lbs0 lbs526 lbs
23Chlorine7782-50-5512 lbs0 lbs512 lbs
24Lead And Lead CompoundsN4201 lbs1 lbs391 lbs
25Cyclohexane110-82-7355 lbs0 lbs373 lbs
26Zinc compoundsN982323 lbs0 lbs323 lbs
27Acrylonitrile107-13-1278 lbs0 lbs294 lbs
28Maleic anhydride108-31-6132 lbs0 lbs281 lbs
29Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0265 lbs0 lbs265 lbs
30Propylene oxide75-56-9255 lbs0 lbs255 lbs
31Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
32Acetaldehyde75-07-045 lbs0 lbs45 lbs
33Manganese7439-96-530 lbs0 lbs30 lbs
34Chromium7440-47-325 lbs0 lbs25 lbs
35Nickel7440-02-024 lbs0 lbs24 lbs
36Diphenylamine122-39-423 lbs0 lbs23 lbs
37Certain glycol ethersN23011 lbs0 lbs11 lbs
38Diethanolamine111-42-210 lbs0 lbs10 lbs
39Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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