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
0 SYLVAN LN CHANNELVIEW 77530
Elevation
-0.18 ft
Height above sea level from USGS data.
FEMA Flood Zone
VE
Unknown
Overall Risk
Very High
Property flooded at 10.0ft depth. Risk based on flood depth at structure.

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 High
Flood Depth
10 ft ±0.5 ft
Depth of water above ground 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 Flooded
Flood Depth: 10 feet
Severity: Critical

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.
  • Simulation shows flooding at current water level - review property drainage and consider mitigation.

🏭 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)
197 thousand lbs
High
30.1x more than typical Houston property
≈ 10 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)
196 thousand lbs
High
40.6x 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)
734 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)196,517 lbs195,783 lbs734 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)112,437 lbs18,073 lbs6 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):

Xylene (mixed isomers), Toluene, 1,3-Butadiene, n-Butyl alcohol, Ethylbenzene

View the full list of 31 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (31 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Xylene (mixed isomers)1330-20-786,047 lbs6 lbs86,053 lbs
2Toluene108-88-321,768 lbs7 lbs21,775 lbs
31,3-Butadiene106-99-019,390 lbs0 lbs19,390 lbs
4n-Butyl alcohol71-36-316,891 lbs0 lbs16,891 lbs
5Ethylbenzene100-41-410,062 lbs6 lbs10,068 lbs
6Benzene71-43-29,225 lbs7 lbs9,232 lbs
7Methanol67-56-16,472 lbs0 lbs6,472 lbs
81,2,4-Trimethylbenzene95-63-64,171 lbs6 lbs4,177 lbs
9Vinyl acetate108-05-43,488 lbs0 lbs3,488 lbs
10Styrene100-42-53,074 lbs0 lbs3,075 lbs
11n-Hexane110-54-32,842 lbs6 lbs2,848 lbs
12Methyl tert-butyl ether1634-04-42,304 lbs0 lbs2,304 lbs
13Propylene oxide75-56-92,129 lbs0 lbs2,129 lbs
14Propylene115-07-11,802 lbs0 lbs1,802 lbs
15Ethylene glycol107-21-11,065 lbs0 lbs1,065 lbs
16Certain glycol ethersN2301,026 lbs0 lbs1,026 lbs
17Chromium7440-47-3817 lbs26 lbs843 lbs
18Manganese7439-96-5500 lbs270 lbs770 lbs
19Hydrogen sulfide7783-06-4750 lbs5 lbs755 lbs
20Ammonia7664-41-7261 lbs250 lbs511 lbs
21p-Xylene106-42-3500 lbs0 lbs500 lbs
22Nickel7440-02-0315 lbs19 lbs334 lbs
23Cyclohexane110-82-7317 lbs5 lbs322 lbs
24tert-Butyl alcohol75-65-0272 lbs0 lbs272 lbs
25Polycyclic aromatic compoundsN590147 lbs2 lbs149 lbs
26Lead7439-92-115 lbs113 lbs129 lbs
27Dicyclopentadiene77-73-684 lbs5 lbs89 lbs
28Methyl methacrylate80-62-618 lbs0 lbs18 lbs
29Naphthalene91-20-311 lbs0 lbs11 lbs
30Tetrachloroethylene127-18-410 lbs0 lbs10 lbs
31Trichloroethylene79-01-610 lbs0 lbs10 lbs

Top chemicals released near this property (2024 only):

Styrene, Vinyl acetate, Xylene (mixed isomers), Methyl methacrylate, 1,3-Butadiene

View the full list of 21 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (21 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Styrene100-42-530 lbs0 lbs78,726 lbs
2Vinyl acetate108-05-4455 lbs0 lbs12,455 lbs
3Xylene (mixed isomers)1330-20-712,145 lbs0 lbs12,145 lbs
4Methyl methacrylate80-62-61 lbs0 lbs3,658 lbs
51,3-Butadiene106-99-02,278 lbs0 lbs2,278 lbs
6Toluene108-88-3574 lbs0 lbs574 lbs
7Benzene71-43-2564 lbs1 lbs565 lbs
8p-Xylene106-42-3500 lbs0 lbs500 lbs
9Methyl tert-butyl ether1634-04-4354 lbs0 lbs354 lbs
10Ethylbenzene100-41-4265 lbs0 lbs265 lbs
11Propylene oxide75-56-9250 lbs0 lbs250 lbs
12n-Hexane110-54-3166 lbs0 lbs166 lbs
13Chromium7440-47-3136 lbs0 lbs136 lbs
14Methanol67-56-1115 lbs0 lbs115 lbs
15n-Butyl alcohol71-36-3108 lbs0 lbs108 lbs
16Cyclohexane110-82-752 lbs0 lbs52 lbs
17Nickel7440-02-036 lbs0 lbs36 lbs
18Dicyclopentadiene77-73-634 lbs0 lbs34 lbs
19Naphthalene91-20-310 lbs0 lbs10 lbs
20Polycyclic aromatic compoundsN5900 lbs0 lbs6 lbs
21Lead7439-92-10 lbs5 lbs6 lbs

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