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
4155 LA PORTE FWY PASADENA 77536
Elevation
25.9 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: 15.9 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 94% 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)
20.97 million lbs
Extremely High
3213.6x more than typical Houston property
≈ 1.0K 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)
13.07 million lbs
Extremely High
2709.5x 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)
7.9 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)20,966,512 lbs13,066,008 lbs7,900,504 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,097,668 lbs1,595,846 lbs331,389 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 94% 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, Cumene, Propylene, 1,3-Butadiene

View the full list of 105 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (105 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs7,511,077 lbs7,511,077 lbs
2Ethylene74-85-12,198,039 lbs0 lbs2,198,039 lbs
3Cumene98-82-81,369,357 lbs883 lbs1,370,240 lbs
4Propylene115-07-11,278,869 lbs0 lbs1,278,869 lbs
51,3-Butadiene106-99-01,022,464 lbs45 lbs1,022,509 lbs
6Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-91,016,311 lbs0 lbs1,016,311 lbs
7Phenol108-95-2646,875 lbs1,112 lbs647,987 lbs
8Benzene71-43-2600,191 lbs245 lbs600,436 lbs
9Methanol67-56-1448,006 lbs141,201 lbs589,207 lbs
10Toluene108-88-3550,547 lbs729 lbs551,311 lbs
11Ammonia7664-41-7473,403 lbs14,832 lbs488,236 lbs
12Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0387,411 lbs0 lbs387,411 lbs
13Ethylene glycol107-21-1375,556 lbs9,387 lbs384,943 lbs
14n-Hexane110-54-3295,603 lbs61 lbs295,704 lbs
15Xylene (mixed isomers)1330-20-7268,885 lbs179 lbs269,064 lbs
16Acetophenone98-86-2213,206 lbs5,107 lbs218,312 lbs
17Hydrogen sulfide7783-06-4211,384 lbs2,545 lbs213,929 lbs
18Vinyl chloride75-01-4211,399 lbs14 lbs211,413 lbs
19Aluminum (fume or dust)7429-90-5132,790 lbs0 lbs132,800 lbs
20Hydrogen cyanide74-90-8126,501 lbs2,741 lbs129,242 lbs
211,2-Dichloroethane107-06-2125,815 lbs0 lbs125,815 lbs
224,4'-Isopropylidenediphenol80-05-7125,700 lbs0 lbs125,700 lbs
23Epichlorohydrin106-89-8121,011 lbs3,811 lbs124,822 lbs
24Acetaldehyde75-07-099,060 lbs4,079 lbs103,139 lbs
25Sodium nitrite7632-00-00 lbs102,300 lbs102,300 lbs
26Acetonitrile75-05-883,752 lbs12,219 lbs95,971 lbs
27Ethylbenzene100-41-478,682 lbs222 lbs78,904 lbs
28Zinc compoundsN9828,759 lbs62,074 lbs70,847 lbs
29Isoprene78-79-569,617 lbs137 lbs69,754 lbs
30Propylene oxide75-56-953,747 lbs0 lbs53,747 lbs
31Cyclohexane110-82-748,139 lbs335 lbs48,524 lbs
32Certain glycol ethersN23037,277 lbs0 lbs37,277 lbs
33Diethanolamine111-42-235,724 lbs0 lbs35,724 lbs
34o-Toluidine95-53-429,521 lbs51 lbs30,113 lbs
35Isobutyraldehyde78-84-228,404 lbs0 lbs28,404 lbs
361,2,4-Trimethylbenzene95-63-627,478 lbs0 lbs27,478 lbs
37Butyraldehyde123-72-823,130 lbs0 lbs23,130 lbs
38Naphthalene91-20-322,748 lbs206 lbs22,955 lbs
39Chlorine7782-50-522,110 lbs0 lbs22,115 lbs
40Dichloromethane75-09-219,581 lbs39 lbs19,620 lbs
41Butyl acrylate141-32-218,335 lbs0 lbs18,335 lbs
42Chloromethane74-87-315,422 lbs31 lbs15,478 lbs
43Chloroethane75-00-314,992 lbs41 lbs15,068 lbs
44Boron trifluoride7637-07-214,854 lbs0 lbs14,854 lbs
45Maleic anhydride108-31-613,929 lbs0 lbs13,929 lbs
46Diaminotoluene (mixed isomers)25376-45-812,695 lbs51 lbs12,797 lbs
47Cumene hydroperoxide80-15-911,006 lbs0 lbs11,006 lbs
48Trade SecretTRD SECRT9,705 lbs0 lbs9,705 lbs
49Dicyclopentadiene77-73-68,670 lbs0 lbs8,670 lbs
50Allyl alcohol107-18-67,427 lbs626 lbs8,053 lbs
51sec-Butyl alcohol78-92-21,946 lbs5,600 lbs7,546 lbs
52Glycidol556-52-52,841 lbs4,410 lbs7,251 lbs
53Aniline62-53-36,824 lbs25 lbs7,119 lbs
54Manganese compoundsN4501,175 lbs5,037 lbs6,212 lbs
55Methyl isobutyl ketone108-10-14,714 lbs2 lbs4,716 lbs
56Tetrachloroethylene127-18-44,241 lbs176 lbs4,417 lbs
57n-Butyl alcohol71-36-34,032 lbs0 lbs4,032 lbs
58Nickel compoundsN49580 lbs3,764 lbs3,844 lbs
59Styrene100-42-53,800 lbs16 lbs3,816 lbs
60Phthalic anhydride85-44-93,545 lbs0 lbs3,545 lbs
61Biphenyl92-52-43,115 lbs15 lbs3,145 lbs
62Lead compoundsN420799 lbs1,393 lbs2,194 lbs
63o-Cresol95-48-71,985 lbs0 lbs1,985 lbs
64Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs1,936 lbs1,936 lbs
65Phenanthrene85-01-81,547 lbs159 lbs1,706 lbs
661,1,2-Trichloroethane79-00-51,537 lbs0 lbs1,537 lbs
67Nonylphenol EthoxylatesN5351,381 lbs0 lbs1,381 lbs
68o-Xylene95-47-61,330 lbs0 lbs1,330 lbs
69Formaldehyde50-00-01,061 lbs0 lbs1,061 lbs
70Bis(2-chloroethyl) ether111-44-4950 lbs0 lbs950 lbs
71Polycyclic aromatic compoundsN590576 lbs130 lbs782 lbs
72Lead And Lead CompoundsN420321 lbs438 lbs759 lbs
73Chloroform67-66-3638 lbs0 lbs638 lbs
74Anthracene120-12-7534 lbs70 lbs604 lbs
75Trichloroethylene79-01-6603 lbs0 lbs603 lbs
76Cresol (mixed isomers)1319-77-3430 lbs146 lbs576 lbs
77Pentachloroethane76-01-7323 lbs0 lbs323 lbs
78Mercury compoundsN458105 lbs212 lbs317 lbs
79Manganese And Manganese CompoundsN450309 lbs0 lbs309 lbs
80Mercury And Mercury CompoundsN45836 lbs195 lbs230 lbs
811,1,2,2-Tetrachloroethane79-34-5219 lbs0 lbs219 lbs
82Benzo[g,h,i]perylene191-24-296 lbs74 lbs170 lbs
83Diphenylamine122-39-4126 lbs14 lbs140 lbs
841,2-Dibromoethane106-93-4133 lbs0 lbs133 lbs
85Cobalt compoundsN09633 lbs89 lbs122 lbs
86Barium And Barium CompoundsN0400 lbs99 lbs99 lbs
87Carbon disulfide75-15-084 lbs0 lbs84 lbs
88Chlorobenzene108-90-777 lbs0 lbs77 lbs
891,2-Dichloroethylene540-59-075 lbs0 lbs75 lbs
90NonylphenolN53061 lbs0 lbs61 lbs
91Chloroprene126-99-855 lbs0 lbs55 lbs
92Nitric acid7697-37-249 lbs0 lbs49 lbs
93Ethylidene dichloride75-34-337 lbs0 lbs37 lbs
94Cobalt And Cobalt CompoundsN09612 lbs24 lbs36 lbs
95Chromium7440-47-30 lbs33 lbs33 lbs
96Nickel7440-02-00 lbs31 lbs31 lbs
97Dioxin and dioxin-like compoundsN1508 lbs23 lbs31 lbs
98Carbon tetrachloride56-23-527 lbs0 lbs27 lbs
99Hexachloroethane67-72-116 lbs0 lbs16 lbs
100Vinylidene chloride75-35-415 lbs0 lbs15 lbs
101Lead7439-92-11 lbs13 lbs14 lbs
102Propionaldehyde123-38-68 lbs0 lbs8 lbs
103trans-1,4-Dichloro-2-butene110-57-67 lbs0 lbs7 lbs
104Hexachlorobenzene118-74-15 lbs0 lbs5 lbs
105Acetamide60-35-52 lbs0 lbs2 lbs

Top chemicals released near this property (2024 only):

Ethylene, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Propylene, Ethylene glycol, 1,3-Butadiene

View the full list of 88 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (88 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene74-85-1515,076 lbs0 lbs515,076 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs277,377 lbs277,377 lbs
3Propylene115-07-1201,043 lbs0 lbs201,043 lbs
4Ethylene glycol107-21-1112,989 lbs0 lbs112,989 lbs
51,3-Butadiene106-99-0108,938 lbs9 lbs108,947 lbs
6Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-997,096 lbs0 lbs97,096 lbs
74,4'-Isopropylidenediphenol80-05-710,300 lbs0 lbs89,800 lbs
8Cumene98-82-887,714 lbs31 lbs87,886 lbs
9Methanol67-56-117,927 lbs27,510 lbs72,875 lbs
10Benzene71-43-258,083 lbs7 lbs60,262 lbs
11Toluene108-88-350,458 lbs10 lbs51,918 lbs
12Phenol108-95-244,667 lbs254 lbs48,437 lbs
13Hydrogen sulfide7783-06-438,758 lbs289 lbs39,047 lbs
14Ammonia7664-41-725,802 lbs1,580 lbs35,097 lbs
15Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-029,259 lbs0 lbs29,259 lbs
16n-Hexane110-54-323,989 lbs15 lbs24,009 lbs
17Xylene (mixed isomers)1330-20-718,976 lbs10 lbs20,851 lbs
18Acetophenone98-86-217,907 lbs860 lbs18,767 lbs
19Vinyl chloride75-01-416,337 lbs1 lbs16,338 lbs
20Zinc compoundsN982340 lbs9,539 lbs15,648 lbs
21Aluminum (fume or dust)7429-90-513,724 lbs0 lbs13,724 lbs
22Hydrogen cyanide74-90-813,000 lbs70 lbs13,070 lbs
23Diethanolamine111-42-23,059 lbs0 lbs12,859 lbs
24Lead compoundsN42093 lbs169 lbs12,855 lbs
25Epichlorohydrin106-89-812,291 lbs331 lbs12,622 lbs
26Nickel compoundsN4950 lbs218 lbs11,929 lbs
27Dichloromethane75-09-29,911 lbs10 lbs9,922 lbs
28Acetaldehyde75-07-08,300 lbs380 lbs8,680 lbs
291,2-Dichloroethane107-06-28,530 lbs0 lbs8,530 lbs
30Acetonitrile75-05-84,900 lbs3,100 lbs8,000 lbs
31Trade SecretTRD SECRT5,677 lbs0 lbs5,677 lbs
32Ethylbenzene100-41-44,642 lbs7 lbs5,302 lbs
33Sodium nitrite7632-00-00 lbs4,600 lbs4,600 lbs
34Isobutyraldehyde78-84-24,431 lbs0 lbs4,431 lbs
35Naphthalene91-20-32,483 lbs22 lbs4,266 lbs
36o-Toluidine95-53-44,008 lbs5 lbs4,018 lbs
37Glycidol556-52-51,002 lbs2,400 lbs3,402 lbs
38Cyclohexane110-82-73,192 lbs22 lbs3,273 lbs
391,2,4-Trimethylbenzene95-63-62,524 lbs0 lbs3,223 lbs
40sec-Butyl alcohol78-92-2540 lbs2,100 lbs2,640 lbs
41Butyraldehyde123-72-82,507 lbs0 lbs2,507 lbs
42Isoprene78-79-52,360 lbs16 lbs2,376 lbs
43Chloroethane75-00-32,123 lbs5 lbs2,128 lbs
44Chloromethane74-87-31,938 lbs5 lbs1,943 lbs
45Diaminotoluene (mixed isomers)25376-45-81,821 lbs5 lbs1,831 lbs
46Styrene100-42-51,160 lbs2 lbs1,371 lbs
47Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
48o-Cresol95-48-788 lbs0 lbs1,122 lbs
49Maleic anhydride108-31-6833 lbs0 lbs982 lbs
50Formaldehyde50-00-099 lbs0 lbs978 lbs
51Chlorine7782-50-5808 lbs0 lbs808 lbs
52n-Butyl alcohol71-36-3638 lbs0 lbs638 lbs
53Butyl acrylate141-32-2597 lbs0 lbs597 lbs
54Dicyclopentadiene77-73-6493 lbs0 lbs503 lbs
55Polycyclic aromatic compoundsN59012 lbs14 lbs390 lbs
56Manganese compoundsN45037 lbs350 lbs387 lbs
57Cumene hydroperoxide80-15-9384 lbs0 lbs384 lbs
58NonylphenolN5302 lbs0 lbs374 lbs
59Benzo[g,h,i]perylene191-24-20 lbs1 lbs334 lbs
60Tetrachloroethylene127-18-4282 lbs4 lbs286 lbs
611,1,2-Trichloroethane79-00-5166 lbs0 lbs166 lbs
62Bis(2-chloroethyl) ether111-44-496 lbs0 lbs96 lbs
63Lead And Lead CompoundsN4207 lbs0 lbs69 lbs
64Mercury compoundsN4580 lbs53 lbs54 lbs
65Dioxin and dioxin-like compoundsN1501 lbs0 lbs53 lbs
66Methyl isobutyl ketone108-10-10 lbs0 lbs44 lbs
67Chloroform67-66-344 lbs0 lbs44 lbs
68Trichloroethylene79-01-643 lbs0 lbs43 lbs
69Lead7439-92-10 lbs0 lbs38 lbs
70Pentachloroethane76-01-736 lbs0 lbs36 lbs
71Mercury And Mercury CompoundsN45817 lbs0 lbs32 lbs
721,1,2,2-Tetrachloroethane79-34-524 lbs0 lbs24 lbs
73Diphenylamine122-39-423 lbs0 lbs23 lbs
74Chlorobenzene108-90-714 lbs0 lbs14 lbs
75Carbon disulfide75-15-012 lbs0 lbs12 lbs
76Nitric acid7697-37-211 lbs0 lbs11 lbs
77Chromium7440-47-30 lbs2 lbs8 lbs
78Phenanthrene85-01-86 lbs1 lbs7 lbs
79Nickel7440-02-00 lbs2 lbs6 lbs
801,2-Dichloroethylene540-59-05 lbs0 lbs5 lbs
811,2-Dibromoethane106-93-44 lbs0 lbs4 lbs
82Carbon tetrachloride56-23-54 lbs0 lbs4 lbs
83Chloroprene126-99-83 lbs0 lbs3 lbs
84Hexachloroethane67-72-12 lbs0 lbs2 lbs
85Anthracene120-12-71 lbs1 lbs2 lbs
86Ethylidene dichloride75-34-31 lbs0 lbs1 lbs
87Propylene oxide75-56-91 lbs0 lbs1 lbs
88Hexachlorobenzene118-74-11 lbs0 lbs1 lbs

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