Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 702 Underwood Rd, La Porte, TX 77571

HCAD #1385990010001
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🌍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
702 Underwood Rd, La Porte, TX 77571
Elevation
29.96 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
151.0 acres
51.2% 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 Safe
Safety Margin: 0 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.

#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
7.3th percentile
Property Pollution Ranking
Very High
Higher pollution than 93% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
15.82 millionlbs
Extremely High
2425.3x more than typical Houston property
≈ 791 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
8.91 millionlbs
Extremely High
1847.8x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
6.91 millionlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
20
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)15,823,353 lbs8,910,872 lbs6,912,480 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,914,481 lbs826,925 lbs700,434 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 93% 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, Propylene, Vinyl acetate, Methanol
View the full list of 62 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(62 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs6,391,670 lbs6,391,670 lbs
2Ethylene74-85-13,017,365 lbs0 lbs3,017,365 lbs
3Propylene115-07-12,858,597 lbs0 lbs2,858,597 lbs
4Vinyl acetate108-05-41,056,100 lbs5,684 lbs1,061,784 lbs
5Methanol67-56-1413,608 lbs462,356 lbs875,964 lbs
6Ammonia7664-41-7338,634 lbs9,444 lbs769,557 lbs
7n-Hexane110-54-3608,115 lbs0 lbs608,115 lbs
81,3-Butadiene106-99-069,913 lbs45 lbs69,958 lbs
9Certain glycol ethersN23064,069 lbs0 lbs64,069 lbs
10Ethylene glycol107-21-147,602 lbs9,387 lbs56,989 lbs
11Propylene oxide75-56-953,747 lbs0 lbs53,747 lbs
12Xylene (mixed isomers)1330-20-743,150 lbs0 lbs43,150 lbs
13Methyl iodide74-88-437,993 lbs0 lbs37,993 lbs
14Zinc compoundsN9826,712 lbs28,870 lbs35,583 lbs
15Chlorine7782-50-532,354 lbs2,816 lbs35,170 lbs
16Acetaldehyde75-07-026,651 lbs0 lbs26,651 lbs
17Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-026,550 lbs0 lbs26,550 lbs
18Toluene108-88-324,960 lbs40 lbs25,000 lbs
19Benzene71-43-219,821 lbs42 lbs19,863 lbs
20Butyl acrylate141-32-218,363 lbs0 lbs18,363 lbs
21Maleic anhydride108-31-617,812 lbs0 lbs17,812 lbs
22Hydrogen sulfide7783-06-417,373 lbs0 lbs17,373 lbs
23Formaldehyde50-00-016,402 lbs0 lbs16,402 lbs
24Chlorobenzene108-90-716,036 lbs0 lbs16,036 lbs
25Boron trifluoride7637-07-214,201 lbs0 lbs14,201 lbs
26Cyclohexane110-82-714,194 lbs0 lbs14,194 lbs
27Chloroethane75-00-313,375 lbs0 lbs13,375 lbs
28Trade SecretTRD SECRT9,705 lbs0 lbs9,705 lbs
29N,N-Dimethylformamide68-12-29,020 lbs0 lbs9,020 lbs
30Isoprene78-79-55,909 lbs0 lbs5,909 lbs
31DiisocyanatesN1204,282 lbs0 lbs4,282 lbs
32Di(2-ethylhexyl) phthalate117-81-72,020 lbs0 lbs2,020 lbs
33Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs1,936 lbs1,936 lbs
34Nonylphenol EthoxylatesN5351,381 lbs0 lbs1,381 lbs
35Styrene100-42-51,233 lbs0 lbs1,233 lbs
36Hydrogen cyanide74-90-8596 lbs0 lbs596 lbs
37Naphthalene91-20-3493 lbs33 lbs526 lbs
38Aluminum (fume or dust)7429-90-5462 lbs0 lbs462 lbs
39Ethylbenzene100-41-4413 lbs32 lbs445 lbs
40Acrylic acid79-10-7348 lbs0 lbs348 lbs
41Chloromethane74-87-3326 lbs0 lbs326 lbs
42Nitric acid7697-37-2309 lbs0 lbs309 lbs
43Dicyclopentadiene77-73-6290 lbs0 lbs290 lbs
44Barium And Barium CompoundsN0400 lbs99 lbs99 lbs
45NonylphenolN53061 lbs0 lbs61 lbs
46Diethanolamine111-42-257 lbs0 lbs57 lbs
47Methyl acrylate96-33-347 lbs0 lbs47 lbs
48Ethyl acrylate140-88-535 lbs0 lbs35 lbs
49Triethylamine121-44-834 lbs0 lbs34 lbs
50n-Butyl alcohol71-36-328 lbs0 lbs28 lbs
51Manganese compoundsN45026 lbs0 lbs26 lbs
52Methyl methacrylate80-62-625 lbs0 lbs25 lbs
53Diphenylamine122-39-410 lbs14 lbs24 lbs
54Dichloromethane75-09-222 lbs0 lbs22 lbs
55sec-Butyl alcohol78-92-221 lbs0 lbs21 lbs
561,2,4-Trimethylbenzene95-63-610 lbs0 lbs10 lbs
57Lead7439-92-10 lbs10 lbs10 lbs
58Polycyclic aromatic compoundsN5907 lbs0 lbs7 lbs
59N-Methyl-2-pyrrolidone872-50-43 lbs0 lbs3 lbs
60Mercury compoundsN4582 lbs0 lbs2 lbs
61Benzo[g,h,i]perylene191-24-20 lbs1 lbs1 lbs
62Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia, Ethylene, Propylene, Methanol
View the full list of 45 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(45 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs629,081 lbs629,081 lbs
2Ammonia7664-41-749,914 lbs371 lbs437,407 lbs
3Ethylene74-85-1299,211 lbs0 lbs299,211 lbs
4Propylene115-07-1259,932 lbs0 lbs259,932 lbs
5Methanol67-56-130,477 lbs69,184 lbs99,661 lbs
6Vinyl acetate108-05-481,700 lbs410 lbs82,110 lbs
7n-Hexane110-54-365,408 lbs0 lbs65,408 lbs
8Trade SecretTRD SECRT5,677 lbs0 lbs5,677 lbs
91,3-Butadiene106-99-03,951 lbs9 lbs3,960 lbs
10Chlorine7782-50-53,601 lbs0 lbs3,601 lbs
11Formaldehyde50-00-03,363 lbs0 lbs3,363 lbs
12Certain glycol ethersN2303,026 lbs0 lbs3,026 lbs
13Maleic anhydride108-31-62,270 lbs0 lbs2,270 lbs
14Toluene108-88-32,074 lbs6 lbs2,080 lbs
15DiisocyanatesN1201,843 lbs0 lbs1,843 lbs
16Zinc compoundsN982426 lbs1,345 lbs1,771 lbs
17Benzene71-43-21,725 lbs3 lbs1,728 lbs
18Cyclohexane110-82-71,726 lbs0 lbs1,726 lbs
19Methyl iodide74-88-41,600 lbs0 lbs1,600 lbs
20Ethylene glycol107-21-11,528 lbs0 lbs1,528 lbs
21Chloroethane75-00-31,429 lbs0 lbs1,429 lbs
22Boron trifluoride7637-07-21,192 lbs0 lbs1,192 lbs
23Xylene (mixed isomers)1330-20-71,144 lbs0 lbs1,144 lbs
24Butyl acrylate141-32-2597 lbs0 lbs597 lbs
25Acetaldehyde75-07-0580 lbs0 lbs580 lbs
26Isoprene78-79-5578 lbs0 lbs578 lbs
27N,N-Dimethylformamide68-12-2570 lbs0 lbs570 lbs
28Ethylbenzene100-41-4360 lbs2 lbs362 lbs
29Naphthalene91-20-3270 lbs18 lbs288 lbs
30Hydrogen sulfide7783-06-4235 lbs0 lbs235 lbs
31Styrene100-42-5143 lbs0 lbs143 lbs
32Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0134 lbs0 lbs134 lbs
33Acrylic acid79-10-7127 lbs0 lbs127 lbs
34Nitric acid7697-37-231 lbs0 lbs31 lbs
35Dicyclopentadiene77-73-630 lbs0 lbs30 lbs
36Aluminum (fume or dust)7429-90-526 lbs0 lbs26 lbs
37n-Butyl alcohol71-36-37 lbs0 lbs7 lbs
38Ethyl acrylate140-88-56 lbs0 lbs6 lbs
39Lead7439-92-10 lbs5 lbs5 lbs
40sec-Butyl alcohol78-92-25 lbs0 lbs5 lbs
41Polycyclic aromatic compoundsN5903 lbs0 lbs3 lbs
42NonylphenolN5302 lbs0 lbs2 lbs
43Dichloromethane75-09-22 lbs0 lbs2 lbs
44Propylene oxide75-56-91 lbs0 lbs1 lbs
45Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs
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