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
7501 ELM ST HOUSTON 77023
Building Size
2,969 sqft
Total structure area from HCAD building records.
Elevation
32.92 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: 22.92 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 78% 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)
642 thousand lbs
Very High
98.4x more than typical Houston property
≈ 32 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)
641 thousand lbs
Extremely High
133.0x 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)
671 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)642,118 lbs641,447 lbs671 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)674,259 lbs68,265 lbs27 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 78% 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):

Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Zinc compounds, Xylene (mixed isomers), Ammonia, Ethylene glycol

View the full list of 51 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (51 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9376,938 lbs0 lbs376,938 lbs
2Zinc compoundsN98293,133 lbs26 lbs93,159 lbs
3Xylene (mixed isomers)1330-20-765,543 lbs0 lbs65,543 lbs
4Ammonia7664-41-751,735 lbs0 lbs51,735 lbs
5Ethylene glycol107-21-114,690 lbs0 lbs14,690 lbs
61,4-Dioxane123-91-110,779 lbs0 lbs10,779 lbs
7Toluene108-88-37,966 lbs0 lbs7,966 lbs
8Hydrogen sulfide7783-06-46,306 lbs0 lbs6,306 lbs
9Phthalic anhydride85-44-92,000 lbs0 lbs2,000 lbs
10Vinyl acetate108-05-41,608 lbs0 lbs1,608 lbs
11Manganese7439-96-51,002 lbs357 lbs1,359 lbs
12Lead compoundsN4201,325 lbs0 lbs1,325 lbs
13Acetaldehyde75-07-01,011 lbs0 lbs1,011 lbs
14Copper compoundsN1001,001 lbs0 lbs1,001 lbs
15Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0999 lbs0 lbs999 lbs
16Lead And Lead CompoundsN420878 lbs10 lbs888 lbs
17Lead7439-92-1622 lbs259 lbs881 lbs
18Methanol67-56-1873 lbs0 lbs873 lbs
19Polycyclic aromatic compoundsN590723 lbs1 lbs732 lbs
201,1,1,2-Tetrachloroethane630-20-6434 lbs0 lbs434 lbs
21Nitric acid7697-37-2397 lbs0 lbs397 lbs
22Carbon disulfide75-15-0351 lbs0 lbs351 lbs
23Propylene115-07-1227 lbs0 lbs227 lbs
24Ethylbenzene100-41-4217 lbs0 lbs218 lbs
25Styrene100-42-5162 lbs0 lbs163 lbs
26Naphthalene91-20-3117 lbs0 lbs118 lbs
27Dimethylamine124-40-390 lbs0 lbs90 lbs
28Chromium compounds (except for chromite ore mined in the Transvaal Region)N09076 lbs0 lbs76 lbs
29Vanadium compoundsN77065 lbs0 lbs65 lbs
30Allyl alcohol107-18-634 lbs0 lbs34 lbs
31Methoxone sodium salt3653-48-320 lbs0 lbs20 lbs
32Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09019 lbs0 lbs19 lbs
33Triethylamine121-44-817 lbs0 lbs17 lbs
34Benzo[g,h,i]perylene191-24-215 lbs0 lbs15 lbs
35tert-Butyl alcohol75-65-015 lbs0 lbs15 lbs
36Acrolein107-02-813 lbs0 lbs13 lbs
37Chromium7440-47-33 lbs7 lbs10 lbs
38Nickel compoundsN49510 lbs0 lbs10 lbs
39Hydroquinone123-31-99 lbs0 lbs9 lbs
40Copper7440-50-80 lbs6 lbs6 lbs
41Nickel7440-02-01 lbs4 lbs5 lbs
42Diaminotoluene (mixed isomers)25376-45-84 lbs0 lbs4 lbs
43Mercury compoundsN4583 lbs1 lbs4 lbs
44Pyridine110-86-13 lbs0 lbs3 lbs
45Benzene71-43-23 lbs0 lbs3 lbs
46Chloroethane75-00-32 lbs0 lbs2 lbs
47p-Cresol106-44-52 lbs0 lbs2 lbs
48Trichloroethylene79-01-61 lbs0 lbs1 lbs
492,4-Diaminotoluene95-80-71 lbs0 lbs1 lbs
501,3-Butadiene106-99-01 lbs0 lbs1 lbs
51Cyclohexane110-82-71 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

1,4-Dioxane, Ethylene glycol, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Methanol, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)

View the full list of 17 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (17 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
11,4-Dioxane123-91-1328 lbs0 lbs396,851 lbs
2Ethylene glycol107-21-15,094 lbs0 lbs177,549 lbs
3Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-950,698 lbs0 lbs50,698 lbs
4Methanol67-56-1152 lbs0 lbs23,825 lbs
5Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0906 lbs0 lbs11,416 lbs
6Xylene (mixed isomers)1330-20-710,496 lbs0 lbs10,496 lbs
7Lead And Lead CompoundsN42031 lbs5 lbs1,925 lbs
8Hydrogen sulfide7783-06-4592 lbs0 lbs592 lbs
9Carbon disulfide75-15-0241 lbs0 lbs241 lbs
10Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0221 lbs0 lbs221 lbs
111,1,1,2-Tetrachloroethane630-20-6212 lbs0 lbs212 lbs
12Ammonia7664-41-7107 lbs0 lbs107 lbs
13Polycyclic aromatic compoundsN59037 lbs0 lbs55 lbs
14Lead7439-92-120 lbs22 lbs42 lbs
15Dimethylamine124-40-323 lbs0 lbs23 lbs
16Vinyl acetate108-05-45 lbs0 lbs5 lbs
17Acetaldehyde75-07-01 lbs0 lbs1 lbs

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