Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 4720 Underwood Rd, Pasadena, TX 77507

HCAD #1207280000007
🧭Jump to Section
🌍Environmental Assessment

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.

🌊Flood Risk Analysis
FEMA Zone X
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
4720 Underwood Rd, Pasadena, TX 77507
Elevation
16.7 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very High
Property flooded at 9.84ft depth.
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 High
Flood Depth
9.84 ft±0.5 ft
Depth of water above ground level.
Water Surface Elevation (WSE)
26.54 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
294.9 acres
100.0% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$0
Vacant lot (no building data).
Depth-Damage (Neighborhood)
$0
Vacant lot (no building data).
Analysis Method
COG Combined 5000 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: 9.84 feet
Severity
Severe
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.

#1
Minimal flood hazard area - property outside mapped high-risk zones
#2
Flood insurance available at preferred rates - over 25% of claims occur in low-risk areas
#3
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#4
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
13.2th percentile
Property Pollution Ranking
High
Higher pollution than 87% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
3.57 millionlbs
Extremely High
546.6x more than typical Houston property
≈ 178 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
3.55 millionlbs
Extremely High
736.1x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
16 thousandlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
16
Industrial facilities within 2 miles
💡
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)3,566,225 lbs3,549,889 lbs16,336 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)325,640 lbs324,365 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 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 chemicals released near this property (past 10 years):
n-Hexane, Ethylene, Ammonia, Nitric acid, Ethylene glycol
View the full list of 59 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(59 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1n-Hexane110-54-31,157,243 lbs0 lbs1,157,243 lbs
2Ethylene74-85-1723,170 lbs0 lbs723,170 lbs
3Ammonia7664-41-7399,585 lbs123 lbs399,728 lbs
4Nitric acid7697-37-2397,654 lbs55 lbs397,734 lbs
5Ethylene glycol107-21-1104,863 lbs0 lbs104,863 lbs
6Ethylene oxide75-21-898,927 lbs0 lbs98,927 lbs
7N,N-Dimethylformamide68-12-286,451 lbs0 lbs86,451 lbs
8Butyl acrylate141-32-272,623 lbs0 lbs72,623 lbs
9Styrene100-42-569,830 lbs0 lbs69,830 lbs
101,3-Butadiene106-99-059,009 lbs0 lbs59,009 lbs
11Methyl methacrylate80-62-657,262 lbs0 lbs57,262 lbs
12Methanol67-56-141,081 lbs0 lbs47,608 lbs
13Certain glycol ethersN23046,549 lbs0 lbs46,550 lbs
14Molybdenum trioxide1313-27-537,655 lbs3,227 lbs40,897 lbs
15Hydrogen sulfide7783-06-431,678 lbs0 lbs31,678 lbs
16Acetaldehyde75-07-025,328 lbs0 lbs25,328 lbs
17tert-Butyl alcohol75-65-020,711 lbs0 lbs20,711 lbs
18n-Butyl alcohol71-36-320,010 lbs0 lbs20,010 lbs
19Chlorine7782-50-515,132 lbs0 lbs15,132 lbs
20Nickel compoundsN49511,795 lbs1,904 lbs13,714 lbs
212-Methoxyethanol109-86-411,669 lbs0 lbs11,669 lbs
22Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51130 lbs9,885 lbs9,930 lbs
23Toluene108-88-39,589 lbs0 lbs9,589 lbs
24Chloroethane75-00-39,070 lbs0 lbs9,070 lbs
25Cobalt compoundsN0965,871 lbs886 lbs6,772 lbs
262-Ethoxyethanol110-80-56,044 lbs0 lbs6,044 lbs
27Cumene98-82-85,060 lbs0 lbs5,060 lbs
28Nickel And Nickel CompoundsN4954,878 lbs62 lbs4,940 lbs
29Cobalt And Cobalt CompoundsN0964,551 lbs42 lbs4,593 lbs
30Propylene oxide75-56-92,606 lbs0 lbs2,606 lbs
31Xylene (mixed isomers)1330-20-72,454 lbs0 lbs2,454 lbs
32Dimethylamine124-40-31,745 lbs0 lbs1,745 lbs
33Allyl alcohol107-18-61,569 lbs0 lbs1,569 lbs
34Allyl chloride107-05-11,277 lbs0 lbs1,277 lbs
35NonylphenolN5301,013 lbs0 lbs1,013 lbs
36Nonylphenol EthoxylatesN5351,008 lbs0 lbs1,008 lbs
371,2,4-Trimethylbenzene95-63-6995 lbs0 lbs995 lbs
38Cyclohexane110-82-7857 lbs0 lbs857 lbs
39Acrylonitrile107-13-1775 lbs0 lbs775 lbs
40Maleic anhydride108-31-6612 lbs0 lbs612 lbs
41Benzoyl chloride98-88-4469 lbs0 lbs469 lbs
42Lead And Lead CompoundsN420211 lbs10 lbs221 lbs
43Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N040145 lbs30 lbs175 lbs
44Bifenthrin82657-04-3149 lbs0 lbs149 lbs
45Formaldehyde50-00-046 lbs102 lbs148 lbs
46Lead compoundsN420138 lbs4 lbs142 lbs
47Copper compoundsN100132 lbs6 lbs138 lbs
48Ethylbenzene100-41-494 lbs0 lbs94 lbs
49Diphenylamine122-39-487 lbs0 lbs87 lbs
50Cyanide compoundsN1065 lbs0 lbs58 lbs
51Chloromethane74-87-351 lbs0 lbs51 lbs
52Ethyl acrylate140-88-549 lbs0 lbs49 lbs
53Naphthalene91-20-333 lbs0 lbs33 lbs
54Cumene hydroperoxide80-15-926 lbs0 lbs26 lbs
55Oxyfluorfen42874-03-310 lbs0 lbs10 lbs
564,4'-Diaminodiphenyl ether101-80-46 lbs0 lbs6 lbs
57Zinc compoundsN9825 lbs0 lbs5 lbs
58Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
59Nickel7440-02-02 lbs0 lbs2 lbs
📋
Top chemicals released near this property (2024 only):
n-Hexane, Ethylene, Ammonia, Nitric acid, N,N-Dimethylformamide
View the full list of 42 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(42 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1n-Hexane110-54-3121,018 lbs0 lbs121,018 lbs
2Ethylene74-85-190,297 lbs0 lbs90,297 lbs
3Ammonia7664-41-745,391 lbs5 lbs45,396 lbs
4Nitric acid7697-37-29,488 lbs5 lbs9,493 lbs
5N,N-Dimethylformamide68-12-27,763 lbs0 lbs7,763 lbs
6Ethylene oxide75-21-87,605 lbs0 lbs7,605 lbs
7Methyl methacrylate80-62-66,109 lbs0 lbs6,109 lbs
8Methanol67-56-15,688 lbs0 lbs5,688 lbs
9Hydrogen sulfide7783-06-43,596 lbs0 lbs3,596 lbs
10Butyl acrylate141-32-23,592 lbs0 lbs3,592 lbs
11Certain glycol ethersN2303,460 lbs0 lbs3,460 lbs
12Chloroethane75-00-33,424 lbs0 lbs3,424 lbs
13Ethylene glycol107-21-13,267 lbs0 lbs3,267 lbs
14Molybdenum trioxide1313-27-52,770 lbs482 lbs3,252 lbs
15Chlorine7782-50-51,293 lbs0 lbs1,293 lbs
16Styrene100-42-51,292 lbs0 lbs1,292 lbs
17n-Butyl alcohol71-36-31,271 lbs0 lbs1,271 lbs
18tert-Butyl alcohol75-65-01,238 lbs0 lbs1,238 lbs
191,3-Butadiene106-99-01,172 lbs0 lbs1,172 lbs
20Nickel compoundsN4951,017 lbs108 lbs1,125 lbs
212-Methoxyethanol109-86-41,027 lbs0 lbs1,027 lbs
22Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs622 lbs622 lbs
23Cobalt compoundsN096455 lbs36 lbs491 lbs
242-Ethoxyethanol110-80-5407 lbs0 lbs407 lbs
25Acetaldehyde75-07-0375 lbs0 lbs375 lbs
26Toluene108-88-3295 lbs0 lbs295 lbs
27Cumene98-82-8210 lbs0 lbs210 lbs
28Allyl chloride107-05-1165 lbs0 lbs165 lbs
29Nonylphenol EthoxylatesN535131 lbs0 lbs131 lbs
30Dimethylamine124-40-3113 lbs0 lbs113 lbs
31Cobalt And Cobalt CompoundsN09682 lbs8 lbs90 lbs
32Nickel And Nickel CompoundsN49582 lbs8 lbs90 lbs
331,2,4-Trimethylbenzene95-63-674 lbs0 lbs74 lbs
34Propylene oxide75-56-970 lbs0 lbs70 lbs
35Xylene (mixed isomers)1330-20-739 lbs0 lbs39 lbs
36Benzoyl chloride98-88-433 lbs0 lbs33 lbs
37Cyclohexane110-82-724 lbs0 lbs24 lbs
38Lead And Lead CompoundsN42016 lbs1 lbs17 lbs
39Maleic anhydride108-31-68 lbs0 lbs8 lbs
40Ethylbenzene100-41-44 lbs0 lbs4 lbs
41Formaldehyde50-00-03 lbs0 lbs3 lbs
42NonylphenolN5301 lbs0 lbs1 lbs
Loading property data...
🏘️Explore More Properties