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
5200 UNDERWOOD RD PASADENA 77507
Elevation
16.05 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: 6.05 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 89% 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)
5.86 million lbs
Extremely High
898.8x more than typical Houston property
≈ 293 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)
5.85 million lbs
Extremely High
1212.7x 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)
16 thousand 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)5,864,291 lbs5,847,955 lbs16,336 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,929,924 lbs490,576 lbs1,275 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 89% 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, Ammonia, Methanol, Vinyl acetate

View the full list of 69 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (69 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-31,215,336 lbs0 lbs1,215,336 lbs
2Ethylene74-85-11,117,038 lbs0 lbs1,117,038 lbs
3Ammonia7664-41-7650,931 lbs123 lbs651,074 lbs
4Methanol67-56-1604,581 lbs0 lbs611,108 lbs
5Vinyl acetate108-05-4516,353 lbs0 lbs516,353 lbs
6Nitric acid7697-37-2397,654 lbs55 lbs397,734 lbs
7Ethylene oxide75-21-8156,220 lbs0 lbs156,220 lbs
8Ethylene glycol107-21-1142,384 lbs0 lbs142,384 lbs
9Butyl acrylate141-32-2112,617 lbs0 lbs112,617 lbs
10Acetaldehyde75-07-0107,268 lbs0 lbs107,268 lbs
11Acrylic acid79-10-799,607 lbs0 lbs99,607 lbs
12N,N-Dimethylformamide68-12-286,451 lbs0 lbs86,451 lbs
13Styrene100-42-569,830 lbs0 lbs69,830 lbs
14Propylene115-07-161,094 lbs0 lbs61,094 lbs
151,3-Butadiene106-99-059,009 lbs0 lbs59,009 lbs
16Methyl methacrylate80-62-657,262 lbs0 lbs57,262 lbs
17Certain glycol ethersN23049,151 lbs0 lbs49,152 lbs
18n-Butyl alcohol71-36-344,473 lbs0 lbs44,473 lbs
19Molybdenum trioxide1313-27-537,655 lbs3,227 lbs40,897 lbs
20Chlorodifluoromethane (HCFC-22)75-45-638,792 lbs0 lbs38,792 lbs
21Ethyl acrylate140-88-537,097 lbs0 lbs37,097 lbs
22Hydrogen sulfide7783-06-431,678 lbs0 lbs31,678 lbs
23Methyl acrylate96-33-323,024 lbs0 lbs23,024 lbs
24tert-Butyl alcohol75-65-020,711 lbs0 lbs20,711 lbs
25Chlorine7782-50-515,132 lbs0 lbs15,132 lbs
26Nickel compoundsN49511,795 lbs1,904 lbs13,714 lbs
272-Methoxyethanol109-86-411,669 lbs0 lbs11,669 lbs
28Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51130 lbs9,885 lbs9,930 lbs
29Toluene108-88-39,589 lbs0 lbs9,589 lbs
30Chloroethane75-00-39,070 lbs0 lbs9,070 lbs
31Cobalt compoundsN0965,871 lbs886 lbs6,772 lbs
322-Ethoxyethanol110-80-56,044 lbs0 lbs6,044 lbs
33Methyl iodide74-88-45,089 lbs0 lbs5,089 lbs
34Cumene98-82-85,060 lbs0 lbs5,060 lbs
35Nickel And Nickel CompoundsN4954,878 lbs62 lbs4,940 lbs
36Cobalt And Cobalt CompoundsN0964,551 lbs42 lbs4,593 lbs
37Propylene oxide75-56-92,606 lbs0 lbs2,606 lbs
38Xylene (mixed isomers)1330-20-72,454 lbs0 lbs2,454 lbs
39Acrolein107-02-82,268 lbs0 lbs2,268 lbs
40Hydroquinone123-31-92,263 lbs0 lbs2,263 lbs
41Formaldehyde50-00-01,950 lbs102 lbs2,052 lbs
42Dimethylamine124-40-31,745 lbs0 lbs1,745 lbs
43Allyl alcohol107-18-61,569 lbs0 lbs1,569 lbs
44Allyl chloride107-05-11,277 lbs0 lbs1,277 lbs
45NonylphenolN5301,013 lbs0 lbs1,013 lbs
46Nonylphenol EthoxylatesN5351,008 lbs0 lbs1,008 lbs
471,2,4-Trimethylbenzene95-63-6995 lbs0 lbs995 lbs
48Cyclohexane110-82-7857 lbs0 lbs857 lbs
49Acrylonitrile107-13-1775 lbs0 lbs775 lbs
50Maleic anhydride108-31-6612 lbs0 lbs612 lbs
51Benzoyl chloride98-88-4469 lbs0 lbs469 lbs
52Lead And Lead CompoundsN420211 lbs10 lbs221 lbs
53Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N040145 lbs30 lbs175 lbs
54Bifenthrin82657-04-3149 lbs0 lbs149 lbs
55Lead compoundsN420138 lbs4 lbs142 lbs
56Copper compoundsN100132 lbs6 lbs138 lbs
57Ethylbenzene100-41-494 lbs0 lbs94 lbs
58Diphenylamine122-39-487 lbs0 lbs87 lbs
59Cyanide compoundsN1065 lbs0 lbs58 lbs
60Chloromethane74-87-351 lbs0 lbs51 lbs
61Naphthalene91-20-333 lbs0 lbs33 lbs
62Cumene hydroperoxide80-15-926 lbs0 lbs26 lbs
63Oxyfluorfen42874-03-310 lbs0 lbs10 lbs
644,4'-Diaminodiphenyl ether101-80-46 lbs0 lbs6 lbs
65Zinc compoundsN9825 lbs0 lbs5 lbs
66Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
67Manganese And Manganese CompoundsN4503 lbs0 lbs3 lbs
68Nickel7440-02-02 lbs0 lbs2 lbs
69Formic acid64-18-61 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Methanol, Ethylene glycol, Ethyl acrylate, Acrylic acid, Ethylene

View the full list of 58 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (58 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-131,109 lbs0 lbs577,460 lbs
2Ethylene glycol107-21-114,421 lbs0 lbs445,310 lbs
3Ethyl acrylate140-88-53,477 lbs0 lbs391,250 lbs
4Acrylic acid79-10-711,701 lbs0 lbs339,248 lbs
5Ethylene74-85-1128,986 lbs0 lbs128,986 lbs
6Vinyl acetate108-05-419,007 lbs0 lbs126,102 lbs
7n-Hexane110-54-3124,052 lbs0 lbs125,187 lbs
8tert-Butyl alcohol75-65-01,238 lbs0 lbs94,671 lbs
9Nonylphenol EthoxylatesN535131 lbs0 lbs93,342 lbs
10Ammonia7664-41-778,519 lbs5 lbs80,118 lbs
11Molybdenum trioxide1313-27-52,770 lbs482 lbs79,984 lbs
12n-Butyl alcohol71-36-31,893 lbs0 lbs78,369 lbs
13Acetaldehyde75-07-04,422 lbs0 lbs78,126 lbs
14Butyl acrylate141-32-26,270 lbs0 lbs47,346 lbs
151,2,4-Trimethylbenzene95-63-674 lbs0 lbs44,010 lbs
16Copper7440-50-80 lbs0 lbs27,230 lbs
17Ethylene oxide75-21-811,137 lbs0 lbs21,960 lbs
18Methyl acrylate96-33-32,867 lbs0 lbs17,363 lbs
19Toluene108-88-3295 lbs0 lbs15,888 lbs
20Certain glycol ethersN2303,532 lbs0 lbs13,299 lbs
21Xylene (mixed isomers)1330-20-739 lbs0 lbs13,258 lbs
22Nickel And Nickel CompoundsN49582 lbs8 lbs12,690 lbs
23Chloroethane75-00-33,424 lbs0 lbs9,649 lbs
24Nitric acid7697-37-29,488 lbs5 lbs9,498 lbs
25N,N-Dimethylformamide68-12-27,763 lbs0 lbs8,980 lbs
26Nickel compoundsN4951,017 lbs108 lbs7,851 lbs
27Methyl methacrylate80-62-66,109 lbs0 lbs6,281 lbs
28Naphthalene91-20-30 lbs0 lbs4,065 lbs
29Hydrogen sulfide7783-06-43,596 lbs0 lbs3,596 lbs
30Styrene100-42-51,292 lbs0 lbs3,055 lbs
31Cumene98-82-8210 lbs0 lbs2,919 lbs
32Cobalt compoundsN096455 lbs36 lbs2,816 lbs
33Ethylbenzene100-41-44 lbs0 lbs2,643 lbs
34Propylene115-07-12,064 lbs0 lbs2,064 lbs
35Acrolein107-02-81,224 lbs0 lbs1,784 lbs
36Hydroquinone123-31-91,723 lbs0 lbs1,723 lbs
37Cumene hydroperoxide80-15-90 lbs0 lbs1,560 lbs
38Formaldehyde50-00-0815 lbs0 lbs1,325 lbs
39Chlorine7782-50-51,293 lbs0 lbs1,293 lbs
401,3-Butadiene106-99-01,172 lbs0 lbs1,172 lbs
41Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs622 lbs1,122 lbs
422-Methoxyethanol109-86-41,027 lbs0 lbs1,045 lbs
43Methyl iodide74-88-4958 lbs0 lbs958 lbs
44Cobalt And Cobalt CompoundsN09682 lbs8 lbs917 lbs
452-Ethoxyethanol110-80-5407 lbs0 lbs429 lbs
46Maleic anhydride108-31-68 lbs0 lbs414 lbs
47Dimethyl phthalate131-11-30 lbs0 lbs406 lbs
48Cyclohexane110-82-724 lbs0 lbs315 lbs
49Propylene oxide75-56-970 lbs0 lbs234 lbs
50NonylphenolN5301 lbs0 lbs224 lbs
51Allyl chloride107-05-1165 lbs0 lbs165 lbs
52Dimethylamine124-40-3113 lbs0 lbs113 lbs
53Lead And Lead CompoundsN42016 lbs1 lbs68 lbs
54Benzoyl chloride98-88-433 lbs0 lbs33 lbs
55Acrylonitrile107-13-10 lbs0 lbs4 lbs
56Manganese And Manganese CompoundsN4503 lbs0 lbs3 lbs
57Aniline62-53-30 lbs0 lbs2 lbs
584,4'-Diaminodiphenyl ether101-80-40 lbs0 lbs1 lbs

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