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
918 HOLLOW TREE ST LA PORTE 77571
Building Size
2,485 sqft
Total structure area from HCAD building records.
Elevation
9.36 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
High
Property flooded at 0.6ft 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
High
Flood Depth
0.64 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
Based on HCAD building value of $247,153 (2,485 sqft). Using U.S. Army Corps of Engineers depth-damage curves.
Depth-Damage Estimate (Neighborhood Comparison)
$0
No neighborhood valuation estimate available. Building exists (2,485 sqft) but no comparable neighborhood data found.
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: 0.64 feet
Severity: Minor

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
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)
3.7 million lbs
Extremely High
567.3x more than typical Houston property
≈ 185 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)
3.7 million lbs
Extremely High
767.4x 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)
567 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)3,701,320 lbs3,700,753 lbs567 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,256,710 lbs266,562 lbs51 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):

Toluene, Methanol, Ethylene, Ammonia, Acrylic acid

View the full list of 70 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (70 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Toluene108-88-3711,522 lbs0 lbs711,522 lbs
2Methanol67-56-1661,742 lbs55 lbs661,797 lbs
3Ethylene74-85-1346,604 lbs0 lbs346,604 lbs
4Ammonia7664-41-7335,424 lbs0 lbs335,424 lbs
5Acrylic acid79-10-7251,302 lbs0 lbs251,302 lbs
6n-Hexane110-54-3205,902 lbs0 lbs205,902 lbs
7Vinyl acetate108-05-4142,721 lbs0 lbs142,721 lbs
8Titanium tetrachloride7550-45-0108,195 lbs0 lbs108,195 lbs
9Cyclohexane110-82-7102,641 lbs0 lbs102,641 lbs
10Propylene oxide75-56-995,696 lbs0 lbs95,696 lbs
111,3-Butadiene106-99-089,666 lbs0 lbs89,666 lbs
12Acrylonitrile107-13-183,639 lbs0 lbs83,639 lbs
13Propylene115-07-157,546 lbs0 lbs57,546 lbs
14n-Butyl alcohol71-36-354,543 lbs0 lbs54,543 lbs
15Isoprene78-79-547,793 lbs0 lbs47,793 lbs
16Hydroquinone123-31-942,849 lbs0 lbs42,849 lbs
17Ethylene glycol107-21-137,504 lbs0 lbs37,504 lbs
18Methyl isobutyl ketone108-10-136,313 lbs0 lbs36,313 lbs
19Xylene (mixed isomers)1330-20-735,072 lbs0 lbs35,072 lbs
20Certain glycol ethersN23034,372 lbs0 lbs34,372 lbs
21Cumene98-82-831,111 lbs0 lbs31,111 lbs
22Phenol108-95-230,497 lbs0 lbs30,497 lbs
23Styrene100-42-517,954 lbs0 lbs17,954 lbs
24Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-017,903 lbs0 lbs17,903 lbs
25Acetaldehyde75-07-014,843 lbs0 lbs14,843 lbs
26Benzene71-43-210,536 lbs0 lbs10,536 lbs
27Formaldehyde50-00-010,409 lbs0 lbs10,409 lbs
28Epichlorohydrin106-89-88,484 lbs0 lbs8,484 lbs
29Dimethylamine124-40-37,773 lbs0 lbs7,773 lbs
30Maleic anhydride108-31-66,232 lbs0 lbs6,232 lbs
31Trade SecretTRD SECRT5,905 lbs88 lbs5,993 lbs
32Ethylbenzene100-41-45,941 lbs0 lbs5,941 lbs
33Diphenylamine122-39-45,851 lbs0 lbs5,851 lbs
34Dibutyl phthalate84-74-25,792 lbs0 lbs5,792 lbs
351,2,4-Trimethylbenzene95-63-64,544 lbs0 lbs4,544 lbs
36tert-Butyl alcohol75-65-04,519 lbs0 lbs4,519 lbs
37Propyleneimine75-55-83,701 lbs0 lbs3,701 lbs
38Methyl methacrylate80-62-63,050 lbs0 lbs3,050 lbs
391,4-Dioxane123-91-12,644 lbs0 lbs2,644 lbs
40Butyl acrylate141-32-22,517 lbs0 lbs2,517 lbs
411,2-Butylene oxide106-88-72,348 lbs0 lbs2,348 lbs
42Chlorine7782-50-52,246 lbs0 lbs2,246 lbs
43Formic acid64-18-62,017 lbs0 lbs2,017 lbs
44NonylphenolN5301,974 lbs0 lbs1,974 lbs
45Allyl alcohol107-18-61,820 lbs0 lbs1,820 lbs
46Naphthalene91-20-31,635 lbs0 lbs1,635 lbs
47Ethylene oxide75-21-81,600 lbs0 lbs1,600 lbs
48Nitric acid7697-37-21,419 lbs0 lbs1,419 lbs
49Dicyclopentadiene77-73-61,387 lbs0 lbs1,387 lbs
50Nonylphenol EthoxylatesN535773 lbs0 lbs773 lbs
51Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9597 lbs0 lbs597 lbs
52Hydrazine302-01-2437 lbs0 lbs437 lbs
53Acrolein107-02-8402 lbs0 lbs402 lbs
54Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs370 lbs370 lbs
55Benzyl chloride100-44-7228 lbs0 lbs228 lbs
56Di(2-ethylhexyl) phthalate117-81-7222 lbs0 lbs222 lbs
57Diethanolamine111-42-2106 lbs0 lbs106 lbs
58Diethyl sulfate64-67-585 lbs0 lbs85 lbs
59Zinc compoundsN98248 lbs33 lbs81 lbs
60Phthalic anhydride85-44-940 lbs0 lbs40 lbs
61Antimony compoundsN01020 lbs15 lbs35 lbs
62Acetonitrile75-05-833 lbs0 lbs33 lbs
63Bis(2-chloroethyl) ether111-44-426 lbs0 lbs26 lbs
642,4-Dimethylphenol105-67-917 lbs0 lbs17 lbs
65Triethylamine121-44-810 lbs0 lbs15 lbs
66Antimony And Antimony CompoundsN0105 lbs5 lbs10 lbs
671,3-Phenylenediamine108-45-22 lbs0 lbs2 lbs
68Lead7439-92-12 lbs0 lbs2 lbs
69Boron trifluoride7637-07-21 lbs0 lbs1 lbs
70Nickel compoundsN4950 lbs1 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Allyl alcohol, Toluene, Vinyl acetate, Acrylic acid

View the full list of 57 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (57 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-130,599 lbs5 lbs978,707 lbs
2Allyl alcohol107-18-696 lbs0 lbs233,588 lbs
3Toluene108-88-339,610 lbs0 lbs172,406 lbs
4Vinyl acetate108-05-414,116 lbs0 lbs128,626 lbs
5Acrylic acid79-10-721,027 lbs0 lbs124,256 lbs
6Dimethylamine124-40-3228 lbs0 lbs91,985 lbs
7Nickel compoundsN4950 lbs0 lbs74,741 lbs
8Xylene (mixed isomers)1330-20-71,270 lbs0 lbs66,506 lbs
9Diphenylamine122-39-4105 lbs0 lbs48,731 lbs
10n-Hexane110-54-319,447 lbs0 lbs36,695 lbs
11tert-Butyl alcohol75-65-0986 lbs0 lbs34,701 lbs
12Ammonia7664-41-730,863 lbs0 lbs31,185 lbs
13Styrene100-42-5798 lbs0 lbs29,705 lbs
14Cyclohexane110-82-78,101 lbs0 lbs29,411 lbs
15Ethylene74-85-124,713 lbs0 lbs24,713 lbs
16Acetaldehyde75-07-0496 lbs0 lbs23,127 lbs
17Isoprene78-79-512,309 lbs0 lbs12,309 lbs
18Propylene115-07-111,682 lbs0 lbs11,682 lbs
19Titanium tetrachloride7550-45-010,755 lbs0 lbs10,755 lbs
20Ethylbenzene100-41-4365 lbs0 lbs10,266 lbs
21Propylene oxide75-56-97,974 lbs0 lbs7,977 lbs
22Dicyclopentadiene77-73-697 lbs0 lbs7,585 lbs
23Phenol108-95-21,875 lbs0 lbs6,506 lbs
24Ethylene glycol107-21-13,258 lbs0 lbs6,008 lbs
25Vanadium compoundsN7700 lbs0 lbs5,540 lbs
26Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0900 lbs0 lbs5,055 lbs
27Hydroquinone123-31-94,885 lbs0 lbs5,047 lbs
28Naphthalene91-20-3235 lbs0 lbs4,135 lbs
29Acetonitrile75-05-824 lbs0 lbs4,091 lbs
30Methyl isobutyl ketone108-10-13,997 lbs0 lbs3,997 lbs
311,3-Butadiene106-99-03,642 lbs0 lbs3,642 lbs
32NonylphenolN530551 lbs0 lbs2,678 lbs
33Cumene98-82-82,611 lbs0 lbs2,611 lbs
34n-Butyl alcohol71-36-3942 lbs0 lbs2,104 lbs
35Certain glycol ethersN230421 lbs0 lbs2,084 lbs
361,2,4-Trimethylbenzene95-63-6624 lbs0 lbs2,021 lbs
37Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-01,959 lbs0 lbs1,959 lbs
38Maleic anhydride108-31-61,351 lbs0 lbs1,351 lbs
39Formic acid64-18-6175 lbs0 lbs1,197 lbs
40Formaldehyde50-00-0447 lbs0 lbs1,090 lbs
41Benzene71-43-21,090 lbs0 lbs1,090 lbs
42Dibutyl phthalate84-74-2496 lbs0 lbs1,073 lbs
43Epichlorohydrin106-89-8643 lbs0 lbs643 lbs
44Trade SecretTRD SECRT0 lbs46 lbs581 lbs
45Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs0 lbs551 lbs
46Ethylene oxide75-21-8462 lbs0 lbs462 lbs
47Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
48Benzyl chloride100-44-7119 lbs0 lbs379 lbs
49Di(2-ethylhexyl) phthalate117-81-7222 lbs0 lbs222 lbs
50Nitric acid7697-37-2219 lbs0 lbs219 lbs
511,4-Dioxane123-91-1126 lbs0 lbs126 lbs
521,2-Butylene oxide106-88-752 lbs0 lbs52 lbs
53Hydrazine302-01-239 lbs0 lbs39 lbs
54Acrolein107-02-828 lbs0 lbs38 lbs
55Antimony And Antimony CompoundsN0100 lbs0 lbs33 lbs
56Propyleneimine75-55-832 lbs0 lbs32 lbs
57Phthalic anhydride85-44-914 lbs0 lbs14 lbs

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