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
1831 S HIGHWAY 146 294 LA PORTE 77571
Elevation
13.43 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: 3.43 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 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)
3.86 million lbs
Extremely High
591.1x more than typical Houston property
≈ 193 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)
3.86 million lbs
Extremely High
799.6x 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)
479 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)3,856,451 lbs3,855,973 lbs479 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,159,842 lbs354,359 lbs5 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):

n-Hexane, Ethylene, Methanol, Toluene, Ammonia

View the full list of 68 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (68 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-31,030,724 lbs0 lbs1,030,724 lbs
2Ethylene74-85-1743,892 lbs0 lbs743,892 lbs
3Methanol67-56-1441,330 lbs55 lbs441,385 lbs
4Toluene108-88-3428,410 lbs0 lbs428,410 lbs
5Ammonia7664-41-7310,361 lbs0 lbs310,361 lbs
6Vinyl acetate108-05-4142,721 lbs0 lbs142,721 lbs
7Cyclohexane110-82-7102,641 lbs0 lbs102,641 lbs
8Propylene oxide75-56-995,696 lbs0 lbs95,696 lbs
9Acrylonitrile107-13-183,639 lbs0 lbs83,639 lbs
10n-Butyl alcohol71-36-355,708 lbs0 lbs55,708 lbs
11Hydroquinone123-31-942,495 lbs0 lbs42,495 lbs
12Propylene115-07-136,801 lbs0 lbs36,801 lbs
13Methyl isobutyl ketone108-10-136,313 lbs0 lbs36,313 lbs
14Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-035,668 lbs0 lbs35,668 lbs
15Certain glycol ethersN23034,372 lbs0 lbs34,372 lbs
16Cumene98-82-831,111 lbs0 lbs31,111 lbs
17Phenol108-95-230,497 lbs0 lbs30,497 lbs
18Xylene (mixed isomers)1330-20-722,865 lbs0 lbs22,865 lbs
19Styrene100-42-517,954 lbs0 lbs17,954 lbs
20Isoprene78-79-515,828 lbs0 lbs15,828 lbs
21Acetaldehyde75-07-014,843 lbs0 lbs14,843 lbs
22Chlorine7782-50-512,676 lbs0 lbs12,676 lbs
231,3-Butadiene106-99-012,674 lbs0 lbs12,674 lbs
24Benzene71-43-210,536 lbs0 lbs10,536 lbs
25Formaldehyde50-00-07,835 lbs0 lbs7,835 lbs
26Ethylbenzene100-41-45,941 lbs0 lbs5,941 lbs
27Diphenylamine122-39-45,851 lbs0 lbs5,851 lbs
281,2,4-Trimethylbenzene95-63-64,544 lbs0 lbs4,544 lbs
29Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
30Acrylic acid79-10-73,532 lbs0 lbs3,532 lbs
31Methyl methacrylate80-62-63,050 lbs0 lbs3,050 lbs
321,4-Dioxane123-91-12,644 lbs0 lbs2,644 lbs
33Butyl acrylate141-32-22,517 lbs0 lbs2,517 lbs
341,2-Butylene oxide106-88-72,348 lbs0 lbs2,348 lbs
35Dimethylamine124-40-32,009 lbs0 lbs2,009 lbs
36NonylphenolN5301,974 lbs0 lbs1,974 lbs
37Phosgene75-44-51,958 lbs0 lbs1,958 lbs
38Allyl alcohol107-18-61,820 lbs0 lbs1,820 lbs
39Naphthalene91-20-31,635 lbs0 lbs1,635 lbs
40Ethylene oxide75-21-81,600 lbs0 lbs1,600 lbs
41Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
42Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
43sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
44Nitric acid7697-37-21,419 lbs0 lbs1,419 lbs
45tert-Butyl alcohol75-65-01,254 lbs0 lbs1,254 lbs
46Dicyclopentadiene77-73-61,178 lbs0 lbs1,178 lbs
47Ethylene glycol107-21-11,132 lbs0 lbs1,132 lbs
48Maleic anhydride108-31-6965 lbs0 lbs965 lbs
49Nonylphenol EthoxylatesN535773 lbs0 lbs773 lbs
50Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9597 lbs0 lbs597 lbs
51Hydrazine302-01-2437 lbs0 lbs437 lbs
52Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs370 lbs370 lbs
53Benzyl chloride100-44-7228 lbs0 lbs228 lbs
54Diethanolamine111-42-2106 lbs0 lbs106 lbs
55Diethyl sulfate64-67-585 lbs0 lbs85 lbs
56Zinc compoundsN98248 lbs33 lbs81 lbs
57Epichlorohydrin106-89-842 lbs0 lbs42 lbs
58Antimony compoundsN01020 lbs15 lbs35 lbs
59N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
60Acetonitrile75-05-833 lbs0 lbs33 lbs
61Bis(2-chloroethyl) ether111-44-426 lbs0 lbs26 lbs
62Formic acid64-18-621 lbs0 lbs21 lbs
632,4-Dimethylphenol105-67-917 lbs0 lbs17 lbs
64Phthalic anhydride85-44-913 lbs0 lbs13 lbs
65Antimony And Antimony CompoundsN0105 lbs5 lbs10 lbs
661,3-Phenylenediamine108-45-22 lbs0 lbs2 lbs
67Boron trifluoride7637-07-21 lbs0 lbs1 lbs
68Nickel compoundsN4950 lbs1 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Allyl alcohol, n-Hexane, Vinyl acetate, Toluene

View the full list of 53 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (53 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-127,365 lbs5 lbs936,680 lbs
2Allyl alcohol107-18-696 lbs0 lbs233,588 lbs
3n-Hexane110-54-3117,061 lbs0 lbs134,809 lbs
4Vinyl acetate108-05-414,116 lbs0 lbs128,626 lbs
5Toluene108-88-314,305 lbs0 lbs105,927 lbs
6Ethylene74-85-196,034 lbs0 lbs96,034 lbs
7Dimethylamine124-40-3228 lbs0 lbs91,985 lbs
8Nickel compoundsN4950 lbs0 lbs74,741 lbs
9Xylene (mixed isomers)1330-20-71,047 lbs0 lbs65,111 lbs
10Diphenylamine122-39-4105 lbs0 lbs48,731 lbs
11Styrene100-42-5798 lbs0 lbs29,705 lbs
12Cyclohexane110-82-78,101 lbs0 lbs29,411 lbs
13Ammonia7664-41-725,258 lbs0 lbs25,484 lbs
14Acetaldehyde75-07-0496 lbs0 lbs23,127 lbs
15Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
16tert-Butyl alcohol75-65-026 lbs0 lbs15,456 lbs
17Ethylbenzene100-41-4365 lbs0 lbs10,266 lbs
18Propylene115-07-110,035 lbs0 lbs10,035 lbs
19Propylene oxide75-56-97,974 lbs0 lbs7,977 lbs
20Dicyclopentadiene77-73-697 lbs0 lbs7,551 lbs
21Phenol108-95-21,875 lbs0 lbs6,506 lbs
22Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,374 lbs0 lbs6,374 lbs
23Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0900 lbs0 lbs5,055 lbs
24Hydroquinone123-31-94,862 lbs0 lbs4,862 lbs
25n-Butyl alcohol71-36-31,017 lbs0 lbs4,633 lbs
26Naphthalene91-20-3235 lbs0 lbs4,135 lbs
27Acetonitrile75-05-824 lbs0 lbs4,091 lbs
28Methyl isobutyl ketone108-10-13,997 lbs0 lbs3,997 lbs
29sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
30Ethylene glycol107-21-1106 lbs0 lbs2,856 lbs
31NonylphenolN530551 lbs0 lbs2,678 lbs
32Cumene98-82-82,611 lbs0 lbs2,611 lbs
33Isoprene78-79-52,125 lbs0 lbs2,125 lbs
34Certain glycol ethersN230421 lbs0 lbs2,084 lbs
351,2,4-Trimethylbenzene95-63-6624 lbs0 lbs2,021 lbs
361,3-Butadiene106-99-01,187 lbs0 lbs1,187 lbs
37Benzene71-43-21,090 lbs0 lbs1,090 lbs
38Chlorine7782-50-5961 lbs0 lbs961 lbs
39Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs0 lbs551 lbs
40Ethylene oxide75-21-8462 lbs0 lbs462 lbs
41Formaldehyde50-00-0296 lbs0 lbs417 lbs
42Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
43Benzyl chloride100-44-7119 lbs0 lbs379 lbs
44Nitric acid7697-37-2219 lbs0 lbs219 lbs
45Acrylic acid79-10-7186 lbs0 lbs192 lbs
46Maleic anhydride108-31-6178 lbs0 lbs178 lbs
471,4-Dioxane123-91-1126 lbs0 lbs126 lbs
48Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
491,2-Butylene oxide106-88-752 lbs0 lbs52 lbs
50Hydrazine302-01-239 lbs0 lbs39 lbs
51Antimony And Antimony CompoundsN0100 lbs0 lbs33 lbs
52Phosgene75-44-527 lbs0 lbs27 lbs
53Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs

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