Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 303 Spencer Lndg E, La Porte, TX 77571

HCAD #1202180020016
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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
303 Spencer Lndg E, La Porte, TX 77571
Building Size
4,252sqft
Total structure area from HCAD building records.
Elevation
20.8 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)
30.64 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)
$189,031
Based on HCAD building value of $290,817.
Depth-Damage (Neighborhood)
$212,480
Based on neighborhood replacement cost.
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
14.2th percentile
Property Pollution Ranking
High
Higher pollution than 86% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
2.89 millionlbs
Extremely High
443.2x more than typical Houston property
≈ 145 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
2.87 millionlbs
Extremely High
596.2x 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
18
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)2,891,299 lbs2,874,963 lbs16,336 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)304,519 lbs303,244 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 86% 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, Ammonia, Ethylene, Nitric acid, Methanol
View the full list of 56 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(56 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1n-Hexane110-54-31,013,131 lbs0 lbs1,013,131 lbs
2Ammonia7664-41-7488,117 lbs123 lbs488,260 lbs
3Ethylene74-85-1427,145 lbs0 lbs427,145 lbs
4Nitric acid7697-37-2397,453 lbs55 lbs397,533 lbs
5Methanol67-56-1166,394 lbs0 lbs166,394 lbs
6Hydroquinone123-31-942,495 lbs0 lbs42,495 lbs
7Propylene115-07-141,301 lbs0 lbs41,301 lbs
8Molybdenum trioxide1313-27-537,655 lbs3,227 lbs40,897 lbs
9Methyl isobutyl ketone108-10-136,313 lbs0 lbs36,313 lbs
10Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
11Hydrogen sulfide7783-06-431,678 lbs0 lbs31,678 lbs
12Cumene98-82-831,165 lbs0 lbs31,165 lbs
13Vinyl acetate108-05-422,306 lbs0 lbs22,306 lbs
14Nickel compoundsN49511,795 lbs1,905 lbs13,715 lbs
15Acetaldehyde75-07-012,256 lbs0 lbs12,256 lbs
16Xylene (mixed isomers)1330-20-711,256 lbs0 lbs11,256 lbs
17Benzene71-43-210,536 lbs0 lbs10,536 lbs
18Chlorine7782-50-510,430 lbs0 lbs10,430 lbs
19Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51130 lbs9,885 lbs9,930 lbs
20Styrene100-42-57,344 lbs0 lbs7,344 lbs
21Cobalt compoundsN0965,871 lbs886 lbs6,772 lbs
22Nickel And Nickel CompoundsN4954,878 lbs62 lbs4,940 lbs
23Cobalt And Cobalt CompoundsN0964,551 lbs42 lbs4,593 lbs
24Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
25Acrylic acid79-10-73,532 lbs0 lbs3,532 lbs
26Methyl methacrylate80-62-63,052 lbs0 lbs3,052 lbs
27Ethylene oxide75-21-82,222 lbs0 lbs2,222 lbs
28Mercury7439-97-60 lbs0 lbs2,200 lbs
29Phosgene75-44-51,958 lbs0 lbs1,958 lbs
30Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
31Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
32Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
33sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
34n-Butyl alcohol71-36-31,165 lbs0 lbs1,165 lbs
35Diphenylamine122-39-4997 lbs0 lbs997 lbs
361,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
37Toluene108-88-3807 lbs0 lbs807 lbs
38Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9597 lbs0 lbs597 lbs
39Manganese7439-96-5511 lbs0 lbs511 lbs
40Propylene oxide75-56-9385 lbs0 lbs385 lbs
41Cyclohexane110-82-7377 lbs0 lbs377 lbs
42Lead And Lead CompoundsN420211 lbs10 lbs221 lbs
43Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N040145 lbs30 lbs175 lbs
44Formaldehyde50-00-046 lbs102 lbs148 lbs
45Lead compoundsN420138 lbs4 lbs142 lbs
46Copper compoundsN100132 lbs6 lbs138 lbs
47Ethylbenzene100-41-494 lbs0 lbs94 lbs
48Chloromethane74-87-351 lbs0 lbs51 lbs
49Chromium7440-47-345 lbs0 lbs45 lbs
50N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
51Naphthalene91-20-333 lbs0 lbs33 lbs
52Ethylene glycol107-21-115 lbs0 lbs15 lbs
53Butyl acrylate141-32-25 lbs0 lbs5 lbs
54Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
55Certain glycol ethersN2303 lbs0 lbs3 lbs
56Maleic anhydride108-31-61 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
n-Hexane, Ethylene, Ammonia, Methanol, Propylene
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-Hexane110-54-3116,540 lbs0 lbs116,540 lbs
2Ethylene74-85-172,650 lbs0 lbs72,650 lbs
3Ammonia7664-41-749,677 lbs5 lbs49,682 lbs
4Methanol67-56-111,092 lbs0 lbs11,092 lbs
5Propylene115-07-110,535 lbs0 lbs10,535 lbs
6Nitric acid7697-37-29,488 lbs5 lbs9,493 lbs
7Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
8Hydroquinone123-31-94,862 lbs0 lbs4,862 lbs
9Methyl isobutyl ketone108-10-13,997 lbs0 lbs3,997 lbs
10Hydrogen sulfide7783-06-43,596 lbs0 lbs3,596 lbs
11Molybdenum trioxide1313-27-52,770 lbs482 lbs3,252 lbs
12Cumene98-82-82,616 lbs0 lbs2,616 lbs
13Vinyl acetate108-05-42,418 lbs0 lbs2,418 lbs
14Nickel compoundsN4951,017 lbs108 lbs1,125 lbs
15Benzene71-43-21,090 lbs0 lbs1,090 lbs
16Chlorine7782-50-5961 lbs0 lbs961 lbs
17Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs622 lbs622 lbs
18Acetaldehyde75-07-0494 lbs0 lbs494 lbs
19Cobalt compoundsN096455 lbs36 lbs491 lbs
20Ethylene oxide75-21-8483 lbs0 lbs483 lbs
21Chloroacetic acid79-11-8476 lbs0 lbs476 lbs
22Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
23Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs250 lbs
24Acrylic acid79-10-7186 lbs0 lbs186 lbs
25Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
26Styrene100-42-5116 lbs0 lbs116 lbs
27Diphenylamine122-39-4103 lbs0 lbs103 lbs
28sec-Butyl alcohol78-92-293 lbs0 lbs93 lbs
29Cobalt And Cobalt CompoundsN09682 lbs8 lbs90 lbs
30Nickel And Nickel CompoundsN49582 lbs8 lbs90 lbs
31n-Butyl alcohol71-36-375 lbs0 lbs75 lbs
321,2,4-Trimethylbenzene95-63-674 lbs0 lbs74 lbs
33Propylene oxide75-56-961 lbs0 lbs61 lbs
34Xylene (mixed isomers)1330-20-739 lbs0 lbs39 lbs
35Phosgene75-44-527 lbs0 lbs27 lbs
36Cyclohexane110-82-724 lbs0 lbs24 lbs
37Lead And Lead CompoundsN42016 lbs1 lbs17 lbs
38Toluene108-88-316 lbs0 lbs16 lbs
39Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
40Ethylbenzene100-41-44 lbs0 lbs4 lbs
41Ethylene glycol107-21-13 lbs0 lbs3 lbs
42Formaldehyde50-00-03 lbs0 lbs3 lbs
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