Home > Analysis: 3802 Cottonwood Dr, La Porte, TX 77571 02/14/2025

📊 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

3802 COTTONWOOD DR LA PORTE 77571

Building Size

2,705 sqft

Total structure area from HCAD building records.

Elevation

18.9 ft

Height above sea level from USGS data.

FEMA Flood Zone

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)

Property not flooded at current water level. No damage to calculate.

Depth-Damage Estimate (Neighborhood Comparison)

Property not flooded at current water level. No damage to calculate.

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: 8.9 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)

5.96 million lbs

Extremely High

913.2x more than typical Houston property
≈ 298 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)

5.93 million lbs

Extremely High

1230.7x 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

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)	5,957,667 lbs	5,934,645 lbs	16,336 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	3,664,249 lbs	469,318 lbs	1,275 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

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, Methanol, Ethylene, Ammonia, Vinyl acetate

View the full list of 75 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (75 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	n-Hexane	110-54-3	1,091,770	0	1,091,770
2	Methanol	67-56-1	823,933	0	830,460
3	Ethylene	74-85-1	797,190	0	797,190
4	Ammonia	7664-41-7	756,594	123	756,737
5	Vinyl acetate	108-05-4	538,659	0	538,659
6	Toluene	108-88-3	430,898	0	430,898
7	Nitric acid	7697-37-2	397,668	55	397,748
8	Acrylic acid	79-10-7	103,139	0	103,139
9	Propylene	115-07-1	97,894	0	97,894
10	Acetaldehyde	75-07-0	93,683	0	93,683
11	Acrylonitrile	107-13-1	83,639	0	83,639
12	n-Butyl alcohol	71-36-3	80,104	0	80,104
13	Ethylene oxide	75-21-8	57,456	0	57,456
14	Hydroquinone	123-31-9	44,758	0	44,758
15	Molybdenum trioxide	1313-27-5	37,655	3,227	40,897
16	Butyl acrylate	141-32-2	39,999	0	39,999
17	Chlorodifluoromethane (HCFC-22)	75-45-6	38,792	0	38,792
18	Ethyl acrylate	140-88-5	37,048	0	37,048
19	Methyl isobutyl ketone	108-10-1	36,313	0	36,313
20	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	33,058	0	33,058
21	Ethylene glycol	107-21-1	32,115	0	32,115
22	Hydrogen sulfide	7783-06-4	31,678	0	31,678
23	Cumene	98-82-8	31,173	0	31,173
24	Phenol	108-95-2	30,497	0	30,497
25	Methyl acrylate	96-33-3	23,024	0	23,024
26	Xylene (mixed isomers)	1330-20-7	22,722	0	22,722
27	Propylene oxide	75-56-9	16,884	0	16,884
28	Styrene	100-42-5	13,938	0	13,938
29	Nickel compounds	N495	11,795	1,905	13,715
30	Benzene	71-43-2	10,536	0	10,536
31	Chlorine	7782-50-5	10,430	0	10,430
32	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	30	9,885	9,930
33	tert-Butyl alcohol	75-65-0	6,860	0	6,860
34	Cobalt compounds	N096	5,871	886	6,772
35	Diphenylamine	122-39-4	5,938	0	5,938
36	Ethylbenzene	100-41-4	5,307	0	5,307
37	Methyl iodide	74-88-4	5,089	0	5,089
38	Nickel And Nickel Compounds	N495	4,878	62	4,940
39	Formaldehyde	50-00-0	4,627	102	4,729
40	Cobalt And Cobalt Compounds	N096	4,551	42	4,593
41	Chloroacetic acid	79-11-8	4,175	0	4,175
42	Certain glycol ethers	N230	4,051	0	4,052
43	Dimethylamine	124-40-3	3,754	0	3,754
44	Allyl alcohol	107-18-6	3,389	0	3,389
45	Methyl methacrylate	80-62-6	3,052	0	3,052
46	1,2-Butylene oxide	106-88-7	2,348	0	2,348
47	Acrolein	107-02-8	2,268	0	2,268
48	Phosgene	75-44-5	1,958	0	1,958
49	Maleic anhydride	108-31-6	1,577	0	1,577
50	Ethyl chloroformate	541-41-3	1,467	0	1,467
51	Methyl chlorocarbonate	79-22-1	1,449	0	1,449
52	sec-Butyl alcohol	78-92-2	1,434	0	1,434
53	Dicyclopentadiene	77-73-6	1,178	0	1,178
54	1,2,4-Trimethylbenzene	95-63-6	1,065	0	1,065
55	Cyclohexane	110-82-7	898	0	898
56	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	597	0	597
57	Benzoyl chloride	98-88-4	469	0	469
58	Hydrazine	302-01-2	437	0	437
59	Lead And Lead Compounds	N420	211	10	221
60	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	145	30	175
61	Lead compounds	N420	138	4	142
62	Copper compounds	N100	132	6	138
63	Naphthalene	91-20-3	96	0	96
64	Cyanide compounds	N106	5	0	58
65	Chloromethane	74-87-3	51	0	51
66	Chromium	7440-47-3	45	0	45
67	N,N-Dimethylformamide	68-12-2	34	0	34
68	Phthalic anhydride	85-44-9	13	0	13
69	Zinc compounds	N982	5	0	5
70	Bis(2-chloroethyl) ether	111-44-4	3	0	3
71	Manganese And Manganese Compounds	N450	3	0	3
72	Cumene hydroperoxide	80-15-9	2	0	2
73	Nickel	7440-02-0	2	0	2
74	Formic acid	64-18-6	1	0	1
75	Boron trifluoride	7637-07-2	1	0	1

Top chemicals released near this property (2024 only):

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

View the full list of 65 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (65 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	39,405	0	1,010,083
2	Ethyl acrylate	140-88-5	3,477	0	391,250
3	Acrylic acid	79-10-7	11,887	0	339,440
4	Ethylene glycol	107-21-1	5,674	0	293,884
5	Allyl alcohol	107-18-6	96	0	233,588
6	n-Hexane	110-54-3	118,064	0	134,001
7	Vinyl acetate	108-05-4	21,425	0	133,219
8	Toluene	108-88-3	14,259	0	116,676
9	tert-Butyl alcohol	75-65-0	493	0	109,357
10	Ethylene	74-85-1	93,866	0	93,866
11	Dimethylamine	124-40-3	341	0	92,098
12	Ammonia	7664-41-7	87,209	5	89,034
13	Molybdenum trioxide	1313-27-5	2,770	482	79,984
14	n-Butyl alcohol	71-36-3	1,639	0	79,534
15	Acetaldehyde	75-07-0	4,028	0	77,712
16	Diphenylamine	122-39-4	105	0	48,731
17	1,2,4-Trimethylbenzene	95-63-6	99	0	44,035
18	Butyl acrylate	141-32-2	2,678	0	43,665
19	Xylene (mixed isomers)	1330-20-7	723	0	39,275
20	Copper	7440-50-8	0	0	27,230
21	Chloroacetic acid	79-11-8	476	0	20,694
22	Styrene	100-42-5	530	0	17,694
23	Methyl acrylate	96-33-3	2,867	0	17,363
24	Nickel And Nickel Compounds	N495	82	8	12,690
25	Propylene	115-07-1	12,098	0	12,098
26	Nonylphenol Ethoxylates	N535	0	0	11,809
27	Nitric acid	7697-37-2	9,490	5	9,500
28	Nickel compounds	N495	1,017	108	7,851
29	Dicyclopentadiene	77-73-6	97	0	7,551
30	Ethylene oxide	75-21-8	1,956	0	6,931
31	Hydroquinone	123-31-9	6,585	0	6,585
32	Phenol	108-95-2	1,875	0	6,506
33	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	6,255	0	6,255
34	Cumene	98-82-8	2,616	0	5,324
35	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0	0	5,055
36	Naphthalene	91-20-3	12	0	4,436
37	Methyl isobutyl ketone	108-10-1	3,997	0	3,997
38	Hydrogen sulfide	7783-06-4	3,596	0	3,596
39	sec-Butyl alcohol	78-92-2	93	0	3,447
40	Ethylbenzene	100-41-4	275	0	2,926
41	Cobalt compounds	N096	455	36	2,816
42	Acrolein	107-02-8	1,224	0	1,784
43	Cumene hydroperoxide	80-15-9	0	0	1,560
44	Formaldehyde	50-00-0	951	0	1,464
45	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	622	1,122
46	Benzene	71-43-2	1,090	0	1,090
47	Chlorine	7782-50-5	961	0	961
48	Methyl iodide	74-88-4	958	0	958
49	Cobalt And Cobalt Compounds	N096	82	8	917
50	Maleic anhydride	108-31-6	186	0	592
51	Propylene oxide	75-56-9	431	0	431
52	Dimethyl phthalate	131-11-3	0	0	406
53	Methyl methacrylate	80-62-6	387	0	391
54	Cyclohexane	110-82-7	65	0	356
55	Ethyl chloroformate	541-41-3	120	0	120
56	Certain glycol ethers	N230	72	0	72
57	Lead And Lead Compounds	N420	16	1	68
58	1,2-Butylene oxide	106-88-7	52	0	52
59	Hydrazine	302-01-2	39	0	39
60	Benzoyl chloride	98-88-4	33	0	33
61	Phosgene	75-44-5	27	0	27
62	Methyl chlorocarbonate	79-22-1	13	0	13
63	Acrylonitrile	107-13-1	0	0	4
64	Manganese And Manganese Compounds	N450	3	0	3
65	Aniline	62-53-3	0	0	2