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
3211 DARTMOUTH DR PASADENA 77503
Building Size
1,779 sqft
Total structure area from HCAD building records.
Elevation
30.8 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: 20.8 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)
3.36 million lbs
Extremely High
515.4x more than typical Houston property
≈ 168 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)
2.31 million lbs
Extremely High
478.0x 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)3,362,400 lbs2,305,262 lbs1,057,138 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)356,832 lbs239,945 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, Methanol, Propylene, Acetophenone

View the full list of 44 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (44 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
3Methanol67-56-1450,674 lbs7,563 lbs458,237 lbs
4Propylene115-07-1261,006 lbs0 lbs261,006 lbs
5Acetophenone98-86-2206,492 lbs3,645 lbs210,136 lbs
6Benzene71-43-2171,685 lbs27 lbs171,714 lbs
7Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
8Acetaldehyde75-07-098,856 lbs3,956 lbs102,812 lbs
9Ammonia7664-41-797,313 lbs2,681 lbs99,994 lbs
10Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
11Xylene (mixed isomers)1330-20-745,323 lbs33 lbs45,365 lbs
12Ethylene74-85-140,872 lbs0 lbs40,872 lbs
131,2,4-Trimethylbenzene95-63-636,587 lbs105 lbs36,695 lbs
14n-Hexane110-54-330,503 lbs170 lbs30,674 lbs
15Toluene108-88-329,713 lbs27 lbs29,749 lbs
16Boron trifluoride7637-07-214,388 lbs0 lbs14,388 lbs
17Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-013,465 lbs0 lbs13,465 lbs
18Phenol108-95-213,449 lbs4 lbs13,453 lbs
19Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
20Chlorine7782-50-56,383 lbs0 lbs6,383 lbs
21Ethylbenzene100-41-45,951 lbs22 lbs5,975 lbs
22Zinc compoundsN9824,126 lbs0 lbs4,126 lbs
23Formaldehyde50-00-03,141 lbs0 lbs3,141 lbs
24Ethylene glycol107-21-12,254 lbs0 lbs2,254 lbs
25Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
26Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
27o-Cresol95-48-71,585 lbs0 lbs1,585 lbs
28Formic acid64-18-61,406 lbs0 lbs1,406 lbs
29Cyclohexane110-82-71,073 lbs0 lbs1,073 lbs
30Maleic anhydride108-31-61,009 lbs0 lbs1,009 lbs
31Naphthalene91-20-3935 lbs21 lbs957 lbs
321,3-Butadiene106-99-0312 lbs0 lbs312 lbs
33Diethanolamine111-42-2205 lbs0 lbs205 lbs
34Diphenylamine122-39-4118 lbs0 lbs118 lbs
35Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
36Chromium7440-47-30 lbs33 lbs33 lbs
37Nickel7440-02-00 lbs31 lbs31 lbs
38Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
39Lead compoundsN4201 lbs22 lbs22 lbs
40Certain glycol ethersN23012 lbs0 lbs12 lbs
41Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
42Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
43Piperonyl butoxide51-03-64 lbs0 lbs4 lbs
44Mercury 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, Methanol, Cumene, Ethylene

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)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs72,435 lbs72,435 lbs
2Propylene115-07-153,581 lbs0 lbs53,581 lbs
3Methanol67-56-119,060 lbs336 lbs46,187 lbs
4Cumene98-82-834,975 lbs0 lbs35,079 lbs
5Ethylene74-85-131,339 lbs0 lbs31,339 lbs
6Ammonia7664-41-711,128 lbs0 lbs19,596 lbs
7Benzene71-43-219,530 lbs2 lbs19,533 lbs
8Acetophenone98-86-217,719 lbs350 lbs18,069 lbs
9Vinyl chloride75-01-413,207 lbs1 lbs13,208 lbs
10Acetaldehyde75-07-08,345 lbs380 lbs8,725 lbs
11Phenol108-95-24,579 lbs0 lbs5,952 lbs
12Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
131,2,4-Trimethylbenzene95-63-64,000 lbs0 lbs4,520 lbs
14n-Hexane110-54-34,280 lbs0 lbs4,280 lbs
15Xylene (mixed isomers)1330-20-73,675 lbs5 lbs3,785 lbs
16Formaldehyde50-00-0354 lbs0 lbs3,326 lbs
17Toluene108-88-32,900 lbs3 lbs2,903 lbs
18Formic acid64-18-6189 lbs0 lbs1,968 lbs
19Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
20o-Cresol95-48-788 lbs0 lbs1,122 lbs
21Dimethylamine124-40-3864 lbs0 lbs884 lbs
22Chlorine7782-50-5487 lbs0 lbs487 lbs
23Ethylbenzene100-41-4427 lbs3 lbs430 lbs
24Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0395 lbs0 lbs395 lbs
25Zinc compoundsN982323 lbs0 lbs323 lbs
261,3-Butadiene106-99-0295 lbs0 lbs295 lbs
27Acrylonitrile107-13-1278 lbs0 lbs294 lbs
28Maleic anhydride108-31-6132 lbs0 lbs281 lbs
29Propylene oxide75-56-9255 lbs0 lbs255 lbs
30Cyclohexane110-82-7232 lbs0 lbs232 lbs
31Naphthalene91-20-3132 lbs1 lbs133 lbs
32Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
33Ethylene glycol107-21-130 lbs0 lbs50 lbs
34Diphenylamine122-39-423 lbs0 lbs23 lbs
35Chromium7440-47-30 lbs2 lbs8 lbs
36Nickel7440-02-00 lbs2 lbs6 lbs
37Lead And Lead CompoundsN4201 lbs1 lbs1 lbs
38Certain glycol ethersN2301 lbs0 lbs1 lbs
39Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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