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
12434 LEDGER LN HOUSTON 77015
Building Size
2,444 sqft
Total structure area from HCAD building records.
Elevation
23.34 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: 13.34 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 84% 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)
1.96 million lbs
Extremely High
300.6x more than typical Houston property
≈ 98 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)
1.92 million lbs
Extremely High
399.1x 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)
37 thousand 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)1,961,104 lbs1,924,424 lbs36,680 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)216,667 lbs162,754 lbs448 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 84% 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):

Ammonia, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), 1,3-Butadiene, Ethylene, n-Butyl alcohol

View the full list of 38 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (38 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Ammonia7664-41-7712,493 lbs33,581 lbs746,074 lbs
2Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9278,278 lbs0 lbs278,278 lbs
31,3-Butadiene106-99-0203,018 lbs0 lbs203,018 lbs
4Ethylene74-85-1165,454 lbs0 lbs165,454 lbs
5n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
6n-Hexane110-54-3127,231 lbs9 lbs127,311 lbs
7Methanol67-56-165,798 lbs0 lbs65,798 lbs
8Styrene100-42-532,913 lbs0 lbs32,913 lbs
9Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
10Xylene (mixed isomers)1330-20-729,092 lbs18 lbs29,181 lbs
11Toluene108-88-327,045 lbs17 lbs27,149 lbs
12Benzene71-43-225,267 lbs9 lbs25,294 lbs
13Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
14Cyclohexane110-82-714,660 lbs0 lbs14,660 lbs
15Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
16Isoprene78-79-513,272 lbs0 lbs13,272 lbs
17Ethylbenzene100-41-47,645 lbs16 lbs7,698 lbs
18Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
19Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-03,066 lbs0 lbs3,066 lbs
201,2,4-Trimethylbenzene95-63-62,808 lbs0 lbs3,023 lbs
21Manganese7439-96-51,668 lbs543 lbs2,211 lbs
22Chromium7440-47-31,182 lbs925 lbs2,106 lbs
23Nickel7440-02-01,350 lbs544 lbs1,894 lbs
24Manganese compoundsN450990 lbs262 lbs1,252 lbs
25Chromium compounds (except for chromite ore mined in the Transvaal Region)N090410 lbs417 lbs828 lbs
26Nickel compoundsN495443 lbs250 lbs694 lbs
27Copper7440-50-8250 lbs0 lbs250 lbs
28Aluminum (fume or dust)7429-90-5250 lbs0 lbs250 lbs
29Cobalt7440-48-4250 lbs0 lbs250 lbs
30Cumene98-82-8169 lbs0 lbs174 lbs
31Naphthalene91-20-3144 lbs0 lbs149 lbs
32Propylene115-07-1126 lbs0 lbs126 lbs
33Zinc compoundsN9820 lbs65 lbs65 lbs
34Anthracene120-12-731 lbs0 lbs31 lbs
35Polycyclic aromatic compoundsN59023 lbs0 lbs23 lbs
36Lead compoundsN4202 lbs11 lbs14 lbs
37Lead And Lead CompoundsN4200 lbs12 lbs12 lbs
38Chlorine7782-50-55 lbs0 lbs5 lbs

Top chemicals released near this property (2024 only):

Ammonia, 1,3-Butadiene, Zinc compounds, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Ethylene

View the full list of 23 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (23 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ammonia7664-41-781,744 lbs93 lbs108,495 lbs
21,3-Butadiene106-99-032,375 lbs0 lbs32,375 lbs
3Zinc compoundsN9820 lbs5 lbs18,755 lbs
4Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-917,245 lbs0 lbs17,245 lbs
5Ethylene74-85-114,466 lbs0 lbs14,466 lbs
6Vanadium compoundsN7700 lbs0 lbs6,689 lbs
7n-Hexane110-54-36,435 lbs0 lbs6,506 lbs
8Xylene (mixed isomers)1330-20-73,231 lbs8 lbs3,311 lbs
9Toluene108-88-32,355 lbs8 lbs2,451 lbs
10Isoprene78-79-52,371 lbs0 lbs2,371 lbs
11Benzene71-43-21,538 lbs2 lbs1,561 lbs
12Lead And Lead CompoundsN4200 lbs5 lbs788 lbs
13Cyclohexane110-82-7294 lbs0 lbs294 lbs
14Manganese7439-96-5162 lbs86 lbs248 lbs
15Chromium7440-47-371 lbs144 lbs215 lbs
16Nickel7440-02-0108 lbs86 lbs202 lbs
171,2,4-Trimethylbenzene95-63-6114 lbs0 lbs185 lbs
18Ethylbenzene100-41-4125 lbs8 lbs170 lbs
19Lead compoundsN4200 lbs3 lbs164 lbs
20Propylene115-07-183 lbs0 lbs83 lbs
21Mercury compoundsN4580 lbs0 lbs46 lbs
22Cumene98-82-825 lbs0 lbs30 lbs
23Naphthalene91-20-311 lbs0 lbs17 lbs

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