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
704 OLD UNDERWOOD RD LA PORTE 77571
Elevation
33.91 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: 23.91 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
Very High
Higher pollution than 92% 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)
13.88 million lbs
Extremely High
2127.8x more than typical Houston property
≈ 694 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)
7.29 million lbs
Extremely High
1510.8x 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)
6.6 million 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)13,882,401 lbs7,285,391 lbs6,597,010 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,954,379 lbs710,325 lbs672,634 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 92% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 0-9th percentile (top 10% most polluted).

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

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Propylene, Vinyl acetate, Ammonia

View the full list of 53 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (53 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs6,134,896 lbs6,134,896 lbs
2Ethylene74-85-12,951,185 lbs0 lbs2,951,185 lbs
3Propylene115-07-11,717,563 lbs0 lbs1,717,563 lbs
4Vinyl acetate108-05-41,056,100 lbs5,684 lbs1,061,784 lbs
5Ammonia7664-41-7338,634 lbs9,444 lbs769,557 lbs
6Methanol67-56-1235,706 lbs424,618 lbs660,324 lbs
7n-Hexane110-54-3581,056 lbs0 lbs581,056 lbs
8Certain glycol ethersN23064,069 lbs0 lbs64,069 lbs
91,3-Butadiene106-99-050,145 lbs0 lbs50,145 lbs
10Xylene (mixed isomers)1330-20-743,150 lbs0 lbs43,150 lbs
11Methyl iodide74-88-437,993 lbs0 lbs37,993 lbs
12Chlorine7782-50-525,003 lbs2,816 lbs27,819 lbs
13Acetaldehyde75-07-026,651 lbs0 lbs26,651 lbs
14Zinc compoundsN9826,608 lbs19,402 lbs26,010 lbs
15Benzene71-43-219,821 lbs42 lbs19,863 lbs
16Ethylene glycol107-21-116,751 lbs0 lbs16,751 lbs
17Formaldehyde50-00-016,402 lbs0 lbs16,402 lbs
18Chlorobenzene108-90-716,036 lbs0 lbs16,036 lbs
19Cyclohexane110-82-714,194 lbs0 lbs14,194 lbs
20Boron trifluoride7637-07-214,190 lbs0 lbs14,190 lbs
21Chloroethane75-00-313,375 lbs0 lbs13,375 lbs
22Toluene108-88-39,250 lbs33 lbs9,282 lbs
23N,N-Dimethylformamide68-12-29,020 lbs0 lbs9,020 lbs
24Isoprene78-79-55,909 lbs0 lbs5,909 lbs
25Maleic anhydride108-31-65,569 lbs0 lbs5,569 lbs
26DiisocyanatesN1204,282 lbs0 lbs4,282 lbs
27Di(2-ethylhexyl) phthalate117-81-72,020 lbs0 lbs2,020 lbs
28Styrene100-42-51,209 lbs0 lbs1,209 lbs
29Hydrogen cyanide74-90-8596 lbs0 lbs596 lbs
30Naphthalene91-20-3493 lbs33 lbs526 lbs
31Aluminum (fume or dust)7429-90-5462 lbs0 lbs462 lbs
32Ethylbenzene100-41-4391 lbs32 lbs423 lbs
33Acrylic acid79-10-7348 lbs0 lbs348 lbs
34Chloromethane74-87-3326 lbs0 lbs326 lbs
35Dicyclopentadiene77-73-6290 lbs0 lbs290 lbs
36Nitric acid7697-37-2260 lbs0 lbs260 lbs
37Diethanolamine111-42-257 lbs0 lbs57 lbs
38Methyl acrylate96-33-347 lbs0 lbs47 lbs
39Ethyl acrylate140-88-535 lbs0 lbs35 lbs
40Triethylamine121-44-834 lbs0 lbs34 lbs
41n-Butyl alcohol71-36-328 lbs0 lbs28 lbs
42Butyl acrylate141-32-228 lbs0 lbs28 lbs
43Manganese compoundsN45026 lbs0 lbs26 lbs
44Methyl methacrylate80-62-625 lbs0 lbs25 lbs
45sec-Butyl alcohol78-92-221 lbs0 lbs21 lbs
46Diphenylamine122-39-410 lbs0 lbs10 lbs
471,2,4-Trimethylbenzene95-63-610 lbs0 lbs10 lbs
48Lead7439-92-10 lbs10 lbs10 lbs
49Polycyclic aromatic compoundsN5907 lbs0 lbs7 lbs
50N-Methyl-2-pyrrolidone872-50-43 lbs0 lbs3 lbs
51Mercury compoundsN4582 lbs0 lbs2 lbs
52Benzo[g,h,i]perylene191-24-20 lbs1 lbs1 lbs
53Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia, Ethylene, Propylene, Maleic anhydride

View the full list of 39 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (39 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs607,579 lbs607,579 lbs
2Ammonia7664-41-749,914 lbs371 lbs475,799 lbs
3Ethylene74-85-1294,016 lbs0 lbs294,016 lbs
4Propylene115-07-1167,759 lbs0 lbs167,759 lbs
5Maleic anhydride108-31-61,569 lbs0 lbs134,889 lbs
6Methanol67-56-125,400 lbs64,010 lbs89,410 lbs
7Vinyl acetate108-05-481,700 lbs410 lbs82,473 lbs
8n-Hexane110-54-361,453 lbs0 lbs62,795 lbs
9Polycyclic aromatic compoundsN5903 lbs0 lbs3,624 lbs
10Chlorine7782-50-53,500 lbs0 lbs3,500 lbs
11Formaldehyde50-00-03,363 lbs0 lbs3,363 lbs
12Zinc compoundsN982426 lbs233 lbs3,305 lbs
13Certain glycol ethersN2303,026 lbs0 lbs3,026 lbs
141,3-Butadiene106-99-02,958 lbs0 lbs2,958 lbs
15Toluene108-88-31,859 lbs3 lbs2,815 lbs
16Cyclohexane110-82-71,726 lbs0 lbs2,621 lbs
17Benzene71-43-21,725 lbs3 lbs2,171 lbs
18DiisocyanatesN1201,843 lbs0 lbs1,843 lbs
19Ethyl acrylate140-88-56 lbs0 lbs1,809 lbs
20Methyl iodide74-88-41,600 lbs0 lbs1,600 lbs
21Chloroethane75-00-31,429 lbs0 lbs1,429 lbs
22Boron trifluoride7637-07-21,192 lbs0 lbs1,192 lbs
23Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
24Acetaldehyde75-07-0580 lbs0 lbs580 lbs
25Isoprene78-79-5578 lbs0 lbs578 lbs
26N,N-Dimethylformamide68-12-2570 lbs0 lbs570 lbs
27Lead7439-92-10 lbs5 lbs457 lbs
28Ethylbenzene100-41-4358 lbs2 lbs365 lbs
29Naphthalene91-20-3270 lbs18 lbs288 lbs
30Styrene100-42-5141 lbs0 lbs155 lbs
31Acrylic acid79-10-7127 lbs0 lbs127 lbs
32Benzo[g,h,i]perylene191-24-20 lbs0 lbs38 lbs
33Dicyclopentadiene77-73-630 lbs0 lbs30 lbs
34Aluminum (fume or dust)7429-90-526 lbs0 lbs26 lbs
35Nitric acid7697-37-220 lbs0 lbs20 lbs
36Mercury And Mercury CompoundsN4581 lbs0 lbs12 lbs
37n-Butyl alcohol71-36-37 lbs0 lbs7 lbs
38sec-Butyl alcohol78-92-25 lbs0 lbs5 lbs
39Ethylene glycol107-21-11 lbs0 lbs1 lbs

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