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
2811 MARSHALL ST PASADENA 77506
Building Size
1,729 sqft
Total structure area from HCAD building records.
Elevation
28.21 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: 18.21 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 88% 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)
4.81 million lbs
Extremely High
736.8x more than typical Houston property
≈ 240 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)
3.74 million lbs
Extremely High
776.2x 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)4,807,175 lbs3,743,187 lbs1,063,988 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)450,783 lbs328,762 lbs73,998 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 88% 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):

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

View the full list of 50 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (50 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Ethylene74-85-11,060,638 lbs0 lbs1,060,638 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs1,038,744 lbs1,038,744 lbs
3Cumene98-82-8518,059 lbs11 lbs518,071 lbs
4Methanol67-56-1451,229 lbs7,563 lbs458,792 lbs
5n-Hexane110-54-3412,892 lbs170 lbs413,063 lbs
6Propylene115-07-1261,006 lbs0 lbs261,006 lbs
7Acetophenone98-86-2206,492 lbs3,645 lbs210,136 lbs
8Benzene71-43-2171,685 lbs27 lbs171,714 lbs
9Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
10Acetaldehyde75-07-098,856 lbs3,956 lbs102,812 lbs
11Ammonia7664-41-792,863 lbs2,681 lbs95,544 lbs
12Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
13Toluene108-88-353,613 lbs27 lbs53,649 lbs
14Xylene (mixed isomers)1330-20-748,626 lbs33 lbs48,668 lbs
151,2,4-Trimethylbenzene95-63-640,441 lbs105 lbs40,549 lbs
16Boron trifluoride7637-07-214,843 lbs0 lbs14,843 lbs
17Zinc compoundsN9827,485 lbs6,851 lbs14,336 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
19Phenol108-95-213,534 lbs4 lbs13,538 lbs
20Ethylbenzene100-41-46,973 lbs22 lbs6,997 lbs
21Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
22Chlorine7782-50-56,477 lbs0 lbs6,477 lbs
23Formaldehyde50-00-03,345 lbs0 lbs3,345 lbs
24Ethylene glycol107-21-12,254 lbs0 lbs2,254 lbs
25Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
26o-Cresol95-48-71,985 lbs0 lbs1,985 lbs
27Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
28Formic acid64-18-61,406 lbs0 lbs1,406 lbs
29Cyclohexane110-82-71,073 lbs0 lbs1,073 lbs
30Manganese compoundsN4501,064 lbs0 lbs1,064 lbs
31Maleic anhydride108-31-61,046 lbs0 lbs1,046 lbs
32Naphthalene91-20-31,012 lbs21 lbs1,034 lbs
331,3-Butadiene106-99-0312 lbs0 lbs312 lbs
34Lead compoundsN420288 lbs22 lbs309 lbs
35Manganese And Manganese CompoundsN450309 lbs0 lbs309 lbs
36Diethanolamine111-42-2205 lbs0 lbs205 lbs
37Nickel7440-02-0120 lbs31 lbs151 lbs
381,2-Dibromoethane106-93-4133 lbs0 lbs133 lbs
391,2-Dichloroethane107-06-2127 lbs0 lbs127 lbs
40Diphenylamine122-39-4126 lbs0 lbs126 lbs
41Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
42Lead And Lead CompoundsN42055 lbs22 lbs78 lbs
43Chromium7440-47-340 lbs33 lbs73 lbs
44Manganese7439-96-570 lbs0 lbs70 lbs
45Certain glycol ethersN23012 lbs0 lbs12 lbs
46Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
47Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
48Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
49Piperonyl butoxide51-03-64 lbs0 lbs4 lbs
50Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

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

View the full list of 43 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (43 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene74-85-1115,347 lbs0 lbs115,347 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs72,435 lbs72,435 lbs
3Propylene115-07-153,581 lbs0 lbs53,581 lbs
4Methanol67-56-119,060 lbs336 lbs46,187 lbs
5Cumene98-82-835,001 lbs0 lbs35,140 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
9n-Hexane110-54-312,725 lbs0 lbs12,731 lbs
10Zinc compoundsN982678 lbs476 lbs9,871 lbs
11Acetaldehyde75-07-08,345 lbs380 lbs8,725 lbs
12Ammonia7664-41-76,678 lbs0 lbs7,432 lbs
13Phenol108-95-24,579 lbs0 lbs5,952 lbs
14Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
15Toluene108-88-33,102 lbs3 lbs4,948 lbs
161,2,4-Trimethylbenzene95-63-64,078 lbs0 lbs4,777 lbs
17Xylene (mixed isomers)1330-20-73,736 lbs5 lbs3,880 lbs
18Formaldehyde50-00-0354 lbs0 lbs3,326 lbs
19Formic acid64-18-6189 lbs0 lbs1,968 lbs
20Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
21o-Cresol95-48-788 lbs0 lbs1,122 lbs
22Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0901 lbs0 lbs1,095 lbs
23Dimethylamine124-40-3864 lbs0 lbs884 lbs
24Chlorine7782-50-5487 lbs0 lbs487 lbs
25Ethylbenzene100-41-4427 lbs3 lbs430 lbs
26Perfluorooctanoic acid335-67-10 lbs0 lbs402 lbs
27Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0395 lbs0 lbs395 lbs
281,3-Butadiene106-99-0295 lbs0 lbs295 lbs
29Acrylonitrile107-13-1278 lbs0 lbs294 lbs
30Maleic anhydride108-31-6132 lbs0 lbs281 lbs
31Propylene oxide75-56-9255 lbs0 lbs255 lbs
32Cyclohexane110-82-7232 lbs0 lbs232 lbs
33Naphthalene91-20-3132 lbs1 lbs133 lbs
34Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
35Lead And Lead CompoundsN4208 lbs1 lbs70 lbs
36Ethylene glycol107-21-130 lbs0 lbs50 lbs
37Chromium7440-47-325 lbs2 lbs33 lbs
38Nickel7440-02-024 lbs2 lbs30 lbs
39Manganese7439-96-530 lbs0 lbs30 lbs
40Diphenylamine122-39-423 lbs0 lbs23 lbs
411,2-Dibromoethane106-93-44 lbs0 lbs4 lbs
42Certain glycol ethersN2301 lbs0 lbs1 lbs
43Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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