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
214 SYLVAN ST LA PORTE 77571
Building Size
3,728 sqft
Total structure area from HCAD building records.
Elevation
11.22 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
Moderate
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
Moderate
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: 1.22 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.

  • This property is in a high-risk flood zone. Flood insurance is required for mortgages.
  • Consider flood mitigation measures like elevated utilities and flood vents.
  • 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
Moderate
Higher pollution than 69% 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)
187 thousand lbs
High
28.7x more than typical Houston property
≈ 9 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)
187 thousand lbs
High
38.9x 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)
53 lbs
Above Typical
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)187,469 lbs187,416 lbs53 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)50,072 lbs16,905 lbs0 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 69% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 30-39th percentile (higher than average pollution).

Top chemicals released near this property (past 10 years):

Ammonia, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Methanol, Chlorine, Xylene (mixed isomers)

View the full list of 28 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (28 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Ammonia7664-41-787,668 lbs0 lbs87,668 lbs
2Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
3Methanol67-56-115,211 lbs0 lbs15,211 lbs
4Chlorine7782-50-510,430 lbs0 lbs10,430 lbs
5Xylene (mixed isomers)1330-20-710,381 lbs0 lbs10,381 lbs
6Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
7Acrylic acid79-10-73,532 lbs0 lbs3,532 lbs
8Chlorobenzene108-90-73,127 lbs0 lbs3,127 lbs
9Methyl methacrylate80-62-63,050 lbs0 lbs3,050 lbs
10Phosgene75-44-51,958 lbs0 lbs1,958 lbs
11Acetonitrile75-05-81,765 lbs0 lbs1,765 lbs
12Methyl tert-butyl ether1634-04-41,591 lbs0 lbs1,591 lbs
13Triethylamine121-44-81,515 lbs0 lbs1,515 lbs
14Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
15Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
16sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
17Ethylene oxide75-21-81,431 lbs0 lbs1,431 lbs
18Toluene108-88-31,261 lbs0 lbs1,261 lbs
19n-Butyl alcohol71-36-31,164 lbs0 lbs1,164 lbs
20N,N-Dimethylformamide68-12-2535 lbs0 lbs535 lbs
21Manganese7439-96-5511 lbs0 lbs511 lbs
22Propylene oxide75-56-9371 lbs0 lbs371 lbs
23Dichloromethane75-09-2251 lbs0 lbs251 lbs
24Zinc compoundsN98235 lbs33 lbs68 lbs
25Antimony compoundsN01020 lbs15 lbs35 lbs
26Ethylene glycol107-21-114 lbs0 lbs14 lbs
27Antimony And Antimony CompoundsN0105 lbs5 lbs10 lbs
28Butyl acrylate141-32-25 lbs0 lbs5 lbs

Top chemicals released near this property (2024 only):

Chloroacetic acid, Ammonia, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region), sec-Butyl alcohol

View the full list of 16 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (16 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
2Ammonia7664-41-77,795 lbs0 lbs8,021 lbs
3Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
4Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0900 lbs0 lbs5,055 lbs
5sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
6n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
7Methanol67-56-133 lbs0 lbs1,882 lbs
8Chlorine7782-50-5961 lbs0 lbs961 lbs
9Ethylene oxide75-21-8420 lbs0 lbs420 lbs
10Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
11Acrylic acid79-10-7186 lbs0 lbs192 lbs
12Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
13Propylene oxide75-56-960 lbs0 lbs60 lbs
14Phosgene75-44-527 lbs0 lbs27 lbs
15Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
16Ethylene glycol107-21-13 lbs0 lbs9 lbs

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