Home > Analysis: 3800 Cottonwood Dr, La Porte, TX 77571 04/23/2025

📊 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

3800 COTTONWOOD DR LA PORTE 77571

Building Size

2,163 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 87% 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)

3.69 million lbs

Extremely High

565.1x more than typical Houston property
≈ 184 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)

3.66 million lbs

Extremely High

759.8x 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)	3,686,971 lbs	3,663,949 lbs	16,336 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	2,175,311 lbs	330,478 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 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 15% most polluted).

Top chemicals released near this property (past 10 years):

n-Hexane, Ammonia, Toluene, Ethylene, Nitric acid

View the full list of 68 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (68 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	n-Hexane	110-54-3	1,036,155	0	1,036,155
2	Ammonia	7664-41-7	505,248	123	505,391
3	Toluene	108-88-3	430,898	0	430,898
4	Ethylene	74-85-1	420,145	0	420,145
5	Nitric acid	7697-37-2	397,668	55	397,748
6	Methanol	67-56-1	260,432	0	266,959
7	Acrylonitrile	107-13-1	83,639	0	83,639
8	n-Butyl alcohol	71-36-3	55,641	0	55,641
9	Hydroquinone	123-31-9	42,495	0	42,495
10	Molybdenum trioxide	1313-27-5	37,655	3,227	40,897
11	Propylene	115-07-1	36,801	0	36,801
12	Methyl isobutyl ketone	108-10-1	36,313	0	36,313
13	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
14	Hydrogen sulfide	7783-06-4	31,678	0	31,678
15	Cumene	98-82-8	31,173	0	31,173
16	Phenol	108-95-2	30,497	0	30,497
17	Xylene (mixed isomers)	1330-20-7	22,722	0	22,722
18	Vinyl acetate	108-05-4	22,306	0	22,306
19	Propylene oxide	75-56-9	16,884	0	16,884
20	Styrene	100-42-5	13,938	0	13,938
21	Nickel compounds	N495	11,795	1,905	13,715
22	Acetaldehyde	75-07-0	12,256	0	12,256
23	Benzene	71-43-2	10,536	0	10,536
24	Chlorine	7782-50-5	10,430	0	10,430
25	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	30	9,885	9,930
26	tert-Butyl alcohol	75-65-0	6,860	0	6,860
27	Cobalt compounds	N096	5,871	886	6,772
28	Diphenylamine	122-39-4	5,938	0	5,938
29	Ethylbenzene	100-41-4	5,307	0	5,307
30	Nickel And Nickel Compounds	N495	4,878	62	4,940
31	Cobalt And Cobalt Compounds	N096	4,551	42	4,593
32	Chloroacetic acid	79-11-8	4,175	0	4,175
33	Dimethylamine	124-40-3	3,754	0	3,754
34	Acrylic acid	79-10-7	3,532	0	3,532
35	Allyl alcohol	107-18-6	3,389	0	3,389
36	Methyl methacrylate	80-62-6	3,052	0	3,052
37	Formaldehyde	50-00-0	2,738	102	2,840
38	1,2-Butylene oxide	106-88-7	2,348	0	2,348
39	Ethylene oxide	75-21-8	2,222	0	2,222
40	Phosgene	75-44-5	1,958	0	1,958
41	Maleic anhydride	108-31-6	1,577	0	1,577
42	Ethyl chloroformate	541-41-3	1,467	0	1,467
43	Certain glycol ethers	N230	1,449	0	1,450
44	Methyl chlorocarbonate	79-22-1	1,449	0	1,449
45	sec-Butyl alcohol	78-92-2	1,434	0	1,434
46	Dicyclopentadiene	77-73-6	1,178	0	1,178
47	1,2,4-Trimethylbenzene	95-63-6	1,065	0	1,065
48	Cyclohexane	110-82-7	898	0	898
49	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	597	0	597
50	Benzoyl chloride	98-88-4	469	0	469
51	Hydrazine	302-01-2	437	0	437
52	Lead And Lead Compounds	N420	211	10	221
53	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	145	30	175
54	Lead compounds	N420	138	4	142
55	Copper compounds	N100	132	6	138
56	Naphthalene	91-20-3	96	0	96
57	Ethylene glycol	107-21-1	77	0	77
58	Cyanide compounds	N106	5	0	58
59	Chloromethane	74-87-3	51	0	51
60	Chromium	7440-47-3	45	0	45
61	N,N-Dimethylformamide	68-12-2	34	0	34
62	Phthalic anhydride	85-44-9	13	0	13
63	Butyl acrylate	141-32-2	5	0	5
64	Zinc compounds	N982	5	0	5
65	Bis(2-chloroethyl) ether	111-44-4	3	0	3
66	Cumene hydroperoxide	80-15-9	2	0	2
67	Nickel	7440-02-0	2	0	2
68	Boron trifluoride	7637-07-2	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Allyl alcohol, n-Hexane, Toluene, tert-Butyl alcohol

View the full list of 58 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (58 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	13,984	0	949,687
2	Allyl alcohol	107-18-6	96	0	233,588
3	n-Hexane	110-54-3	117,508	0	133,445
4	Toluene	108-88-3	14,259	0	116,676
5	tert-Butyl alcohol	75-65-0	493	0	109,357
6	Dimethylamine	124-40-3	341	0	92,098
7	Molybdenum trioxide	1313-27-5	2,770	482	79,984
8	Ethylene	74-85-1	72,000	0	72,000
9	Ammonia	7664-41-7	54,081	5	55,906
10	Diphenylamine	122-39-4	105	0	48,731
11	1,2,4-Trimethylbenzene	95-63-6	99	0	44,035
12	Xylene (mixed isomers)	1330-20-7	723	0	39,275
13	Copper	7440-50-8	0	0	27,230
14	Chloroacetic acid	79-11-8	476	0	20,694
15	Styrene	100-42-5	530	0	17,694
16	Nickel And Nickel Compounds	N495	82	8	12,690
17	Nonylphenol Ethoxylates	N535	0	0	11,809
18	Propylene	115-07-1	10,035	0	10,035
19	Nitric acid	7697-37-2	9,490	5	9,500
20	Nickel compounds	N495	1,017	108	7,851
21	Dicyclopentadiene	77-73-6	97	0	7,551
22	Vinyl acetate	108-05-4	2,418	0	7,117
23	Phenol	108-95-2	1,875	0	6,506
24	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
25	Cumene	98-82-8	2,616	0	5,324
26	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0	0	5,055
27	Hydroquinone	123-31-9	4,862	0	4,862
28	n-Butyl alcohol	71-36-3	1,017	0	4,633
29	Naphthalene	91-20-3	12	0	4,436
30	Methyl isobutyl ketone	108-10-1	3,997	0	3,997
31	Hydrogen sulfide	7783-06-4	3,596	0	3,596
32	sec-Butyl alcohol	78-92-2	93	0	3,447
33	Ethylene oxide	75-21-8	483	0	3,183
34	Ethylbenzene	100-41-4	275	0	2,926
35	Cobalt compounds	N096	455	36	2,816
36	Cumene hydroperoxide	80-15-9	0	0	1,560
37	Ethylene glycol	107-21-1	3	0	1,147
38	Acetaldehyde	75-07-0	494	0	1,132
39	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	622	1,122
40	Benzene	71-43-2	1,090	0	1,090
41	Chlorine	7782-50-5	961	0	961
42	Cobalt And Cobalt Compounds	N096	82	8	917
43	Formaldehyde	50-00-0	154	0	667
44	Maleic anhydride	108-31-6	186	0	592
45	Propylene oxide	75-56-9	431	0	431
46	Dimethyl phthalate	131-11-3	0	0	406
47	Methyl methacrylate	80-62-6	387	0	391
48	Cyclohexane	110-82-7	65	0	356
49	Acrylic acid	79-10-7	186	0	192
50	Ethyl chloroformate	541-41-3	120	0	120
51	Lead And Lead Compounds	N420	16	1	68
52	1,2-Butylene oxide	106-88-7	52	0	52
53	Hydrazine	302-01-2	39	0	39
54	Benzoyl chloride	98-88-4	33	0	33
55	Phosgene	75-44-5	27	0	27
56	Methyl chlorocarbonate	79-22-1	13	0	13
57	Acrylonitrile	107-13-1	0	0	4
58	Aniline	62-53-3	0	0	2