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
12302 LEDGER LN HOUSTON 77015
Building Size
2,047 sqft
Total structure area from HCAD building records.
Elevation
22.67 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: 12.67 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 87% 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)
3.93 million lbs
Extremely High
602.9x more than typical Houston property
≈ 197 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)
3.9 million lbs
Extremely High
808.0x 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)
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)3,933,434 lbs3,896,583 lbs36,850 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)240,075 lbs185,028 lbs466 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 87% 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, Ammonia, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Propylene, Ethylene

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)
1n-Hexane110-54-3772,726 lbs9 lbs773,218 lbs
2Ammonia7664-41-7735,498 lbs33,581 lbs769,079 lbs
3Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9528,391 lbs0 lbs528,391 lbs
4Propylene115-07-1271,756 lbs0 lbs271,756 lbs
5Ethylene74-85-1243,909 lbs0 lbs243,909 lbs
61,3-Butadiene106-99-0232,089 lbs0 lbs232,089 lbs
7Hydrogen cyanide74-90-8213,734 lbs0 lbs213,734 lbs
8Xylene (mixed isomers)1330-20-7189,170 lbs114 lbs191,685 lbs
9n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
10Toluene108-88-3133,568 lbs33 lbs134,545 lbs
11Benzene71-43-2100,397 lbs29 lbs100,997 lbs
12Methanol67-56-165,798 lbs0 lbs65,798 lbs
13Ethylbenzene100-41-439,665 lbs55 lbs40,349 lbs
14Hydrogen sulfide7783-06-437,772 lbs0 lbs37,773 lbs
15Styrene100-42-532,913 lbs0 lbs32,913 lbs
16Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
17Cyclohexane110-82-728,736 lbs0 lbs29,496 lbs
18Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
19Naphthalene91-20-315,396 lbs0 lbs16,722 lbs
20Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
21Isoprene78-79-513,272 lbs0 lbs13,272 lbs
221,2,4-Trimethylbenzene95-63-610,135 lbs0 lbs10,610 lbs
23Cumene98-82-87,282 lbs0 lbs7,469 lbs
24Biphenyl92-52-44,816 lbs0 lbs5,138 lbs
25Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
26Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-03,066 lbs0 lbs3,066 lbs
27Manganese7439-96-51,668 lbs543 lbs2,211 lbs
28Chromium7440-47-31,182 lbs925 lbs2,106 lbs
29Nickel7440-02-01,350 lbs544 lbs1,894 lbs
30Manganese compoundsN450990 lbs262 lbs1,252 lbs
31Chromium compounds (except for chromite ore mined in the Transvaal Region)N090410 lbs417 lbs828 lbs
32Nickel compoundsN495443 lbs250 lbs694 lbs
33Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
34Chlorine7782-50-5273 lbs0 lbs273 lbs
35Copper7440-50-8250 lbs0 lbs250 lbs
36Cobalt7440-48-4250 lbs0 lbs250 lbs
37Aluminum (fume or dust)7429-90-5250 lbs0 lbs250 lbs
38Zinc compoundsN9820 lbs65 lbs65 lbs
39Polycyclic aromatic compoundsN59045 lbs0 lbs45 lbs
40Anthracene120-12-731 lbs0 lbs31 lbs
41Mercury7439-97-630 lbs0 lbs30 lbs
42Lead compoundsN4202 lbs11 lbs14 lbs
43Lead And Lead CompoundsN4200 lbs12 lbs12 lbs
44Benzo[g,h,i]perylene191-24-23 lbs0 lbs3 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 25 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (25 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ammonia7664-41-783,014 lbs93 lbs109,798 lbs
21,3-Butadiene106-99-033,331 lbs0 lbs33,331 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
5Ethylene74-85-114,987 lbs0 lbs14,987 lbs
6n-Hexane110-54-39,223 lbs0 lbs9,327 lbs
7Xylene (mixed isomers)1330-20-78,330 lbs18 lbs8,725 lbs
8Vanadium compoundsN7700 lbs0 lbs6,689 lbs
9Toluene108-88-35,576 lbs10 lbs5,723 lbs
10Benzene71-43-24,710 lbs4 lbs4,828 lbs
11Isoprene78-79-52,371 lbs0 lbs2,371 lbs
12Ethylbenzene100-41-41,386 lbs12 lbs1,473 lbs
131,2,4-Trimethylbenzene95-63-61,076 lbs0 lbs1,285 lbs
14Propylene115-07-11,202 lbs0 lbs1,202 lbs
15Lead And Lead CompoundsN4200 lbs5 lbs1,178 lbs
16Hydrogen sulfide7783-06-4923 lbs0 lbs923 lbs
17Naphthalene91-20-3607 lbs0 lbs631 lbs
18Cyclohexane110-82-7417 lbs0 lbs435 lbs
19Cumene98-82-8263 lbs0 lbs269 lbs
20Manganese7439-96-5162 lbs86 lbs248 lbs
21Chromium7440-47-371 lbs144 lbs215 lbs
22Nickel7440-02-0108 lbs86 lbs202 lbs
23Lead compoundsN4200 lbs3 lbs164 lbs
24Mercury compoundsN4580 lbs0 lbs46 lbs
25Chlorine7782-50-525 lbs0 lbs25 lbs

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