Home > Analysis: 3103 Green Leaf Ln, La Porte, TX 77571 03/20/2025

📊 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

3103 GREEN LEAF LN LA PORTE 77571

Building Size

2,894 sqft

Total structure area from HCAD building records.

Elevation

7.7 ft

Height above sea level from USGS data.

FEMA Flood Zone

High Risk - 1% annual chance with established base flood elevation

Overall Risk

High

Property flooded at 2.3ft depth. Risk based on flood depth at structure.

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

High

Flood Depth

2.3 ft ±0.5 ft

Depth of water above ground 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)

Based on HCAD building value of $183,270 (2,894 sqft). Using U.S. Army Corps of Engineers depth-damage curves.

Depth-Damage Estimate (Neighborhood Comparison)

No neighborhood valuation estimate available. Building exists (2,894 sqft) but no comparable neighborhood data found.

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 Flooded

Flood Depth: 2.3 feet
Severity: Moderate

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.

This property is in a high-risk flood zone. Flood insurance is required for mortgages.
Consider flood mitigation measures like elevated utilities and flood vents.
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.
Simulation shows flooding at current water level - review property drainage and consider mitigation.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking

High

Higher pollution than 84% 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)

1.88 million lbs

Extremely High

288.4x more than typical Houston property
≈ 94 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)

1.88 million lbs

Extremely High

390.0x 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)

567 lbs

High

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.

Period	Total	Air	Water
Typical Houston Property (2014-2024)	6,524 lbs	4,822 lbs	0 lbs
This Property (2014-2024)	1,881,314 lbs	1,880,747 lbs	567 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	1,431,144 lbs	140,124 lbs	51 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

70-79th

5.8%

80-89th

4.3%

90-100thLowest Pollution

34.2%

Higher pollution than 84% 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):

Ethylene, Methanol, Ammonia, Acrylic acid, Vinyl acetate

View the full list of 57 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (57 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Ethylene	74-85-1	339,184	0	339,184
2	Methanol	67-56-1	304,206	55	304,261
3	Ammonia	7664-41-7	265,454	0	265,454
4	Acrylic acid	79-10-7	247,770	0	247,770
5	Vinyl acetate	108-05-4	120,415	0	120,415
6	Benzene	71-43-2	115,467	0	115,467
7	Cyclohexane	110-82-7	102,641	0	102,641
8	Propylene oxide	75-56-9	95,325	0	95,325
9	Ethylbenzene	100-41-4	66,674	0	66,674
10	Styrene	100-42-5	52,990	0	52,990
11	Certain glycol ethers	N230	34,372	0	34,372
12	n-Hexane	110-54-3	17,593	0	17,593
13	Isoprene	78-79-5	15,828	0	15,828
14	Propylene	115-07-1	15,687	0	15,687
15	1,3-Butadiene	106-99-0	14,544	0	14,544
16	Toluene	108-88-3	11,553	0	11,553
17	Xylene (mixed isomers)	1330-20-7	8,288	0	8,288
18	Formaldehyde	50-00-0	7,593	0	7,593
19	Trade Secret	TRD SECRT	5,905	88	5,993
20	1,2,4-Trimethylbenzene	95-63-6	4,474	0	4,474
21	Butyl acrylate	141-32-2	4,451	0	4,451
22	1,4-Dioxane	123-91-1	2,644	0	2,644
23	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	2,610	0	2,610
24	Acetaldehyde	75-07-0	2,587	0	2,587
25	1,2-Butylene oxide	106-88-7	2,348	0	2,348
26	Chlorine	7782-50-5	2,246	0	2,246
27	Formic acid	64-18-6	2,017	0	2,017
28	Acrylonitrile	107-13-1	1,977	0	1,977
29	Nonylphenol	N530	1,974	0	1,974
30	Allyl alcohol	107-18-6	1,820	0	1,820
31	Naphthalene	91-20-3	1,572	0	1,572
32	Nitric acid	7697-37-2	1,405	0	1,405
33	tert-Butyl alcohol	75-65-0	1,254	0	1,254
34	Dicyclopentadiene	77-73-6	1,178	0	1,178
35	Ethylene glycol	107-21-1	1,118	0	1,118
36	Nonylphenol Ethoxylates	N535	773	0	773
37	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	597	0	597
38	Maleic anhydride	108-31-6	534	0	534
39	Acrolein	107-02-8	402	0	402
40	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	370	370
41	Hydroquinone	123-31-9	355	0	355
42	Benzyl chloride	100-44-7	228	0	228
43	Ethylene oxide	75-21-8	169	0	169
44	n-Butyl alcohol	71-36-3	114	0	114
45	Diethanolamine	111-42-2	106	0	106
46	Diethyl sulfate	64-67-5	85	0	85
47	Zinc compounds	N982	48	33	81
48	Epichlorohydrin	106-89-8	42	0	42
49	Antimony compounds	N010	20	15	35
50	Acetonitrile	75-05-8	33	0	33
51	Bis(2-chloroethyl) ether	111-44-4	26	0	26
52	2,4-Dimethylphenol	105-67-9	17	0	17
53	Cumene	98-82-8	15	0	15
54	Phthalic anhydride	85-44-9	13	0	13
55	Antimony And Antimony Compounds	N010	5	5	10
56	1,3-Phenylenediamine	108-45-2	2	0	2
57	Nickel compounds	N495	0	1	1

Top chemicals released near this property (2024 only):

Methanol, Allyl alcohol, Acrylic acid, Vinyl acetate, Toluene

View the full list of 44 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (44 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	15,367	5	497,442
2	Allyl alcohol	107-18-6	96	0	233,588
3	Acrylic acid	79-10-7	20,841	0	124,064
4	Vinyl acetate	108-05-4	11,698	0	121,509
5	Toluene	108-88-3	783	0	80,040
6	Nickel compounds	N495	0	0	74,741
7	Xylene (mixed isomers)	1330-20-7	451	0	64,433
8	Styrene	100-42-5	3,754	0	33,323
9	Cyclohexane	110-82-7	8,101	0	29,411
10	Ethylene	74-85-1	24,775	0	24,775
11	Ammonia	7664-41-7	23,068	0	23,164
12	Acetaldehyde	75-07-0	2	0	21,995
13	n-Hexane	110-54-3	521	0	17,769
14	Ethylbenzene	100-41-4	4,042	0	15,706
15	tert-Butyl alcohol	75-65-0	26	0	15,456
16	Benzene	71-43-2	8,393	0	8,949
17	Propylene oxide	75-56-9	7,914	0	7,917
18	Dicyclopentadiene	77-73-6	97	0	7,551
19	Acetonitrile	75-05-8	24	0	4,091
20	Naphthalene	91-20-3	223	0	3,764
21	Ethylene glycol	107-21-1	103	0	2,932
22	Nonylphenol	N530	551	0	2,678
23	Isoprene	78-79-5	2,125	0	2,125
24	Certain glycol ethers	N230	421	0	2,084
25	Propylene	115-07-1	2,003	0	2,003
26	1,2,4-Trimethylbenzene	95-63-6	599	0	1,996
27	Formic acid	64-18-6	175	0	1,197
28	1,3-Butadiene	106-99-0	1,187	0	1,187
29	Acrylonitrile	107-13-1	879	0	1,029
30	Formaldehyde	50-00-0	296	0	936
31	Butyl acrylate	141-32-2	848	0	848
32	Trade Secret	TRD SECRT	0	46	581
33	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	0	551
34	Benzyl chloride	100-44-7	119	0	379
35	Nitric acid	7697-37-2	217	0	217
36	Hydroquinone	123-31-9	23	0	185
37	1,4-Dioxane	123-91-1	126	0	126
38	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	119	0	119
39	n-Butyl alcohol	71-36-3	10	0	95
40	1,2-Butylene oxide	106-88-7	52	0	52
41	Ethylene oxide	75-21-8	42	0	42
42	Acrolein	107-02-8	28	0	38
43	Antimony And Antimony Compounds	N010	0	0	33
44	Maleic anhydride	108-31-6	26	0	26