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
1231 HAHLO ST HOUSTON 77020
Elevation
42.31 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
Vacant lot (no building data). No structure to calculate damage for.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Vacant lot (no building data). No structure to calculate damage for.
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: 32.31 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 75% 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)
492 thousand lbs
Very High
75.5x more than typical Houston property
≈ 25 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)
487 thousand lbs
Extremely High
101.1x 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)
5 thousand lbs
Very 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)492,390 lbs487,367 lbs5,024 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)154,516 lbs47,673 lbs596 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 75% 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):

Zinc compounds, n-Hexane, Styrene, Nitric acid, Toluene

View the full list of 35 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (35 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Zinc compoundsN982199,379 lbs4,558 lbs203,937 lbs
2n-Hexane110-54-3125,432 lbs0 lbs125,432 lbs
3Styrene100-42-572,717 lbs0 lbs72,717 lbs
4Nitric acid7697-37-235,489 lbs0 lbs35,489 lbs
5Toluene108-88-323,715 lbs0 lbs23,715 lbs
61,2,4-Trimethylbenzene95-63-68,648 lbs0 lbs8,648 lbs
7Hydrogen sulfide7783-06-46,912 lbs0 lbs6,912 lbs
8Lead compoundsN4203,161 lbs76 lbs3,237 lbs
9Cyclohexane110-82-72,389 lbs0 lbs2,389 lbs
10Copper compoundsN1002,022 lbs1 lbs2,023 lbs
11Lead And Lead CompoundsN4201,554 lbs1 lbs1,555 lbs
12Xylene (mixed isomers)1330-20-71,434 lbs0 lbs1,434 lbs
13Polycyclic aromatic compoundsN5901,170 lbs1 lbs1,170 lbs
14Ethylene glycol107-21-1856 lbs0 lbs856 lbs
15Propylene115-07-1810 lbs0 lbs810 lbs
16Certain glycol ethersN230402 lbs0 lbs402 lbs
17Chloroacetic acid79-11-8330 lbs0 lbs330 lbs
18Methyl methacrylate80-62-6265 lbs0 lbs265 lbs
19Methanol67-56-1255 lbs0 lbs255 lbs
20Manganese7439-96-52 lbs221 lbs223 lbs
21Benzo[g,h,i]perylene191-24-2221 lbs0 lbs221 lbs
22Chromium compounds (except for chromite ore mined in the Transvaal Region)N09067 lbs0 lbs67 lbs
23Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs67 lbs67 lbs
24Nickel7440-02-021 lbs41 lbs62 lbs
25Chromium7440-47-319 lbs12 lbs35 lbs
26Aluminum (fume or dust)7429-90-524 lbs0 lbs24 lbs
27Lead7439-92-10 lbs24 lbs24 lbs
28Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09019 lbs0 lbs19 lbs
29Barium And Barium CompoundsN0400 lbs16 lbs16 lbs
30Manganese compoundsN45016 lbs0 lbs16 lbs
31Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51115 lbs0 lbs15 lbs
32Nickel compoundsN49513 lbs0 lbs13 lbs
33Copper And Copper CompoundsN10010 lbs0 lbs10 lbs
34Copper7440-50-80 lbs6 lbs6 lbs
35Cobalt7440-48-40 lbs0 lbs4 lbs

Top chemicals released near this property (2024 only):

Zinc compounds, Manganese, n-Hexane, Toluene, Nitric acid

View the full list of 18 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (18 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Zinc compoundsN98212,375 lbs500 lbs81,235 lbs
2Manganese7439-96-50 lbs41 lbs19,987 lbs
3n-Hexane110-54-312,290 lbs0 lbs12,290 lbs
4Toluene108-88-311,886 lbs0 lbs11,886 lbs
5Nitric acid7697-37-2750 lbs0 lbs9,441 lbs
6Styrene100-42-57,400 lbs0 lbs7,400 lbs
7Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0906 lbs0 lbs6,071 lbs
8Nickel7440-02-00 lbs31 lbs2,080 lbs
9Xylene (mixed isomers)1330-20-71,434 lbs0 lbs1,434 lbs
101,2,4-Trimethylbenzene95-63-61,210 lbs0 lbs1,210 lbs
11Lead And Lead CompoundsN420161 lbs0 lbs1,152 lbs
12Polycyclic aromatic compoundsN590115 lbs0 lbs125 lbs
13Lead compoundsN4205 lbs3 lbs60 lbs
14Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs19 lbs53 lbs
15Lead7439-92-10 lbs3 lbs48 lbs
16Benzo[g,h,i]perylene191-24-221 lbs0 lbs24 lbs
17Chloroacetic acid79-11-810 lbs0 lbs10 lbs
18Methyl methacrylate80-62-610 lbs0 lbs10 lbs

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