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
4207 LA PORTE FWY PASADENA 77536
Elevation
24.35 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: 14.35 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)
19.84 million lbs
Extremely High
3040.7x more than typical Houston property
≈ 992 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)
12.25 million lbs
Extremely High
2540.4x 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)
7.59 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)19,838,691 lbs12,250,585 lbs7,588,106 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,028,088 lbs1,560,149 lbs303,812 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, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 82 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (82 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs7,254,303 lbs7,254,303 lbs
2Ethylene74-85-12,163,607 lbs0 lbs2,163,607 lbs
3Cumene98-82-81,369,250 lbs883 lbs1,370,133 lbs
4Propylene115-07-11,276,560 lbs0 lbs1,276,560 lbs
5Sulfuric 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
61,3-Butadiene106-99-01,002,696 lbs0 lbs1,002,696 lbs
7Phenol108-95-2646,875 lbs1,112 lbs647,987 lbs
8Benzene71-43-2595,647 lbs245 lbs595,892 lbs
9Toluene108-88-3532,406 lbs721 lbs533,163 lbs
10Ammonia7664-41-7473,403 lbs14,832 lbs488,236 lbs
11Methanol67-56-1269,033 lbs103,463 lbs372,496 lbs
12Ethylene glycol107-21-1344,705 lbs0 lbs344,705 lbs
13n-Hexane110-54-3285,344 lbs61 lbs285,445 lbs
14Xylene (mixed isomers)1330-20-7262,875 lbs179 lbs263,054 lbs
15Acetophenone98-86-2213,206 lbs5,107 lbs218,312 lbs
16Hydrogen sulfide7783-06-4194,011 lbs2,545 lbs196,556 lbs
17Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0194,993 lbs0 lbs194,993 lbs
18Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
19Aluminum (fume or dust)7429-90-5132,790 lbs0 lbs132,800 lbs
20Hydrogen cyanide74-90-8126,501 lbs2,741 lbs129,242 lbs
214,4'-Isopropylidenediphenol80-05-7125,700 lbs0 lbs125,700 lbs
22Epichlorohydrin106-89-8121,011 lbs3,811 lbs124,822 lbs
23Acetaldehyde75-07-099,060 lbs4,079 lbs103,139 lbs
24Sodium nitrite7632-00-00 lbs102,300 lbs102,300 lbs
25Acetonitrile75-05-883,752 lbs12,219 lbs95,971 lbs
26Ethylbenzene100-41-474,711 lbs222 lbs74,933 lbs
27Isoprene78-79-569,617 lbs137 lbs69,754 lbs
28Zinc compoundsN9828,655 lbs55,677 lbs64,347 lbs
29Certain glycol ethersN23037,277 lbs0 lbs37,277 lbs
30Cyclohexane110-82-735,442 lbs335 lbs35,827 lbs
31Diethanolamine111-42-235,724 lbs0 lbs35,724 lbs
32o-Toluidine95-53-429,521 lbs51 lbs30,113 lbs
33Isobutyraldehyde78-84-228,404 lbs0 lbs28,404 lbs
341,2,4-Trimethylbenzene95-63-627,478 lbs0 lbs27,478 lbs
35Butyraldehyde123-72-823,130 lbs0 lbs23,130 lbs
36Naphthalene91-20-321,922 lbs206 lbs22,128 lbs
37Dichloromethane75-09-219,581 lbs39 lbs19,620 lbs
38Chloromethane74-87-315,422 lbs31 lbs15,478 lbs
39Boron trifluoride7637-07-214,843 lbs0 lbs14,843 lbs
40Chloroethane75-00-314,708 lbs41 lbs14,784 lbs
41Diaminotoluene (mixed isomers)25376-45-812,695 lbs51 lbs12,797 lbs
42Cumene hydroperoxide80-15-911,006 lbs0 lbs11,006 lbs
43Chlorine7782-50-510,133 lbs0 lbs10,138 lbs
44Dicyclopentadiene77-73-68,670 lbs0 lbs8,670 lbs
45Allyl alcohol107-18-67,427 lbs626 lbs8,053 lbs
46sec-Butyl alcohol78-92-21,946 lbs5,600 lbs7,546 lbs
47Glycidol556-52-52,841 lbs4,410 lbs7,251 lbs
48Aniline62-53-36,824 lbs25 lbs7,119 lbs
49Manganese compoundsN4501,175 lbs5,037 lbs6,212 lbs
50Methyl isobutyl ketone108-10-14,714 lbs2 lbs4,716 lbs
51Tetrachloroethylene127-18-44,088 lbs176 lbs4,264 lbs
52n-Butyl alcohol71-36-34,032 lbs0 lbs4,032 lbs
53Nickel compoundsN49580 lbs3,764 lbs3,844 lbs
54Styrene100-42-53,800 lbs16 lbs3,816 lbs
55Phthalic anhydride85-44-93,545 lbs0 lbs3,545 lbs
56Biphenyl92-52-43,115 lbs15 lbs3,145 lbs
57Lead compoundsN420799 lbs1,393 lbs2,194 lbs
58o-Cresol95-48-71,985 lbs0 lbs1,985 lbs
59Phenanthrene85-01-81,547 lbs159 lbs1,706 lbs
60Maleic anhydride108-31-61,686 lbs0 lbs1,686 lbs
61o-Xylene95-47-61,330 lbs0 lbs1,330 lbs
62Formaldehyde50-00-01,061 lbs0 lbs1,061 lbs
63Polycyclic aromatic compoundsN590576 lbs130 lbs782 lbs
64Lead And Lead CompoundsN420321 lbs438 lbs759 lbs
65Anthracene120-12-7534 lbs70 lbs604 lbs
66Cresol (mixed isomers)1319-77-3430 lbs146 lbs576 lbs
67Mercury compoundsN458105 lbs212 lbs317 lbs
68Manganese And Manganese CompoundsN450309 lbs0 lbs309 lbs
69Mercury And Mercury CompoundsN45836 lbs195 lbs230 lbs
70Benzo[g,h,i]perylene191-24-296 lbs74 lbs170 lbs
711,2-Dibromoethane106-93-4133 lbs0 lbs133 lbs
721,2-Dichloroethane107-06-2127 lbs0 lbs127 lbs
73Diphenylamine122-39-4126 lbs0 lbs126 lbs
74Cobalt compoundsN09633 lbs89 lbs122 lbs
75Carbon disulfide75-15-084 lbs0 lbs84 lbs
76Cobalt And Cobalt CompoundsN09612 lbs24 lbs36 lbs
77Chromium7440-47-30 lbs33 lbs33 lbs
78Nickel7440-02-00 lbs31 lbs31 lbs
79Dioxin and dioxin-like compoundsN1507 lbs23 lbs31 lbs
80Lead7439-92-11 lbs13 lbs14 lbs
81Propionaldehyde123-38-68 lbs0 lbs8 lbs
82Acetamide60-35-52 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 67 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (67 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene74-85-1513,244 lbs0 lbs513,244 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs255,875 lbs255,875 lbs
3Propylene115-07-1200,727 lbs0 lbs200,727 lbs
4Ethylene glycol107-21-1111,462 lbs0 lbs111,462 lbs
51,3-Butadiene106-99-0107,945 lbs0 lbs107,945 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
8Cumene98-82-887,689 lbs31 lbs87,859 lbs
9Benzene71-43-258,000 lbs7 lbs60,170 lbs
10Methanol67-56-112,850 lbs22,336 lbs57,173 lbs
11Toluene108-88-350,100 lbs7 lbs51,356 lbs
12Phenol108-95-244,667 lbs254 lbs48,437 lbs
13Hydrogen sulfide7783-06-438,523 lbs289 lbs38,812 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)7647-01-024,347 lbs0 lbs24,347 lbs
16n-Hexane110-54-323,565 lbs15 lbs23,585 lbs
17Xylene (mixed isomers)1330-20-718,877 lbs10 lbs20,725 lbs
18Acetophenone98-86-217,907 lbs860 lbs18,767 lbs
19Zinc compoundsN982340 lbs8,650 lbs14,700 lbs
20Aluminum (fume or dust)7429-90-513,724 lbs0 lbs13,724 lbs
21Vinyl chloride75-01-413,207 lbs1 lbs13,208 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
29Acetonitrile75-05-84,900 lbs3,100 lbs8,000 lbs
30Ethylbenzene100-41-44,620 lbs7 lbs5,262 lbs
31Sodium nitrite7632-00-00 lbs4,600 lbs4,600 lbs
32Isobutyraldehyde78-84-24,431 lbs0 lbs4,431 lbs
33Naphthalene91-20-32,376 lbs22 lbs4,130 lbs
34o-Toluidine95-53-44,008 lbs5 lbs4,018 lbs
35Glycidol556-52-51,002 lbs2,400 lbs3,402 lbs
361,2,4-Trimethylbenzene95-63-62,524 lbs0 lbs3,223 lbs
37Cyclohexane110-82-72,938 lbs22 lbs2,965 lbs
38sec-Butyl alcohol78-92-2540 lbs2,100 lbs2,640 lbs
39Butyraldehyde123-72-82,507 lbs0 lbs2,507 lbs
40Isoprene78-79-52,360 lbs16 lbs2,376 lbs
41Chloroethane75-00-32,102 lbs5 lbs2,107 lbs
42Chloromethane74-87-31,938 lbs5 lbs1,943 lbs
43Diaminotoluene (mixed isomers)25376-45-81,821 lbs5 lbs1,831 lbs
44Styrene100-42-51,160 lbs2 lbs1,371 lbs
45Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
46o-Cresol95-48-788 lbs0 lbs1,122 lbs
47Formaldehyde50-00-099 lbs0 lbs978 lbs
48n-Butyl alcohol71-36-3638 lbs0 lbs638 lbs
49Dicyclopentadiene77-73-6493 lbs0 lbs503 lbs
50Chlorine7782-50-5497 lbs0 lbs497 lbs
51Polycyclic aromatic compoundsN59012 lbs14 lbs390 lbs
52Manganese compoundsN45037 lbs350 lbs387 lbs
53Cumene hydroperoxide80-15-9384 lbs0 lbs384 lbs
54Benzo[g,h,i]perylene191-24-20 lbs1 lbs334 lbs
55Maleic anhydride108-31-6132 lbs0 lbs281 lbs
56Tetrachloroethylene127-18-4270 lbs4 lbs274 lbs
57Lead And Lead CompoundsN4207 lbs0 lbs69 lbs
58Mercury compoundsN4580 lbs53 lbs54 lbs
59Dioxin and dioxin-like compoundsN1501 lbs0 lbs53 lbs
60Mercury And Mercury CompoundsN45817 lbs0 lbs32 lbs
61Diphenylamine122-39-423 lbs0 lbs23 lbs
62Carbon disulfide75-15-012 lbs0 lbs12 lbs
63Chromium7440-47-30 lbs2 lbs8 lbs
64Phenanthrene85-01-86 lbs1 lbs7 lbs
65Nickel7440-02-00 lbs2 lbs6 lbs
661,2-Dibromoethane106-93-44 lbs0 lbs4 lbs
67Anthracene120-12-71 lbs1 lbs2 lbs

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