Home > Analysis: 209 Spencer Lndg W, La Porte, TX 77571 04/11/2025

📊 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

209 SPENCER LNDG W LA PORTE 77571

Building Size

2,559 sqft

Total structure area from HCAD building records.

Elevation

22.24 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: 12.24 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)

3.63 million lbs

Extremely High

557.0x more than typical Houston property
≈ 182 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)

3.62 million lbs

Extremely High

749.7x 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)	3,633,890 lbs	3,615,249 lbs	16,336 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	1,694,070 lbs	326,884 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 65 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (65 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	n-Hexane	110-54-3	1,013,131	0	1,013,131
2	Ammonia	7664-41-7	501,457	123	501,600
3	Toluene	108-88-3	427,857	0	427,857
4	Ethylene	74-85-1	427,145	0	427,145
5	Nitric acid	7697-37-2	397,467	55	397,547
6	Methanol	67-56-1	252,467	0	252,467
7	Acrylonitrile	107-13-1	83,639	0	83,639
8	n-Butyl alcohol	71-36-3	55,594	0	55,594
9	Hydroquinone	123-31-9	42,495	0	42,495
10	Propylene	115-07-1	41,301	0	41,301
11	Molybdenum trioxide	1313-27-5	37,655	3,227	40,897
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	27,478	0	27,478
18	Vinyl acetate	108-05-4	22,306	0	22,306
19	Nickel compounds	N495	11,795	1,905	13,715
20	Styrene	100-42-5	12,385	0	12,385
21	Acetaldehyde	75-07-0	12,256	0	12,256
22	Benzene	71-43-2	10,536	0	10,536
23	Chlorine	7782-50-5	10,430	0	10,430
24	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	30	9,885	9,930
25	Cobalt compounds	N096	5,871	886	6,772
26	Diphenylamine	122-39-4	5,851	0	5,851
27	tert-Butyl alcohol	75-65-0	5,583	0	5,583
28	Ethylbenzene	100-41-4	5,307	0	5,307
29	Nickel And Nickel Compounds	N495	4,878	62	4,940
30	Cobalt And Cobalt Compounds	N096	4,551	42	4,593
31	Chloroacetic acid	79-11-8	4,175	0	4,175
32	Acrylic acid	79-10-7	3,532	0	3,532
33	Methyl methacrylate	80-62-6	3,052	0	3,052
34	Formaldehyde	50-00-0	2,738	102	2,840
35	Ethylene oxide	75-21-8	2,222	0	2,222
36	Mercury	7439-97-6	0	0	2,200
37	Dimethylamine	124-40-3	2,009	0	2,009
38	Phosgene	75-44-5	1,958	0	1,958
39	Aluminum oxide (fibrous forms)	1344-28-1	1,750	0	1,750
40	Allyl alcohol	107-18-6	1,569	0	1,569
41	Ethyl chloroformate	541-41-3	1,467	0	1,467
42	Methyl chlorocarbonate	79-22-1	1,449	0	1,449
43	sec-Butyl alcohol	78-92-2	1,434	0	1,434
44	1,2,4-Trimethylbenzene	95-63-6	1,065	0	1,065
45	Maleic anhydride	108-31-6	966	0	966
46	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	597	0	597
47	Manganese	7439-96-5	511	0	511
48	Benzoyl chloride	98-88-4	469	0	469
49	Hydrazine	302-01-2	437	0	437
50	Propylene oxide	75-56-9	385	0	385
51	Cyclohexane	110-82-7	377	0	377
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	Chloromethane	74-87-3	51	0	51
58	Chromium	7440-47-3	45	0	45
59	Ethylene glycol	107-21-1	37	0	37
60	N,N-Dimethylformamide	68-12-2	34	0	34
61	Butyl acrylate	141-32-2	5	0	5
62	Bis(2-chloroethyl) ether	111-44-4	3	0	3
63	Certain glycol ethers	N230	3	0	3
64	Cumene hydroperoxide	80-15-9	2	0	2
65	Boron trifluoride	7637-07-2	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Aluminum oxide (fibrous forms), n-Hexane, tert-Butyl alcohol, Dimethylamine

View the full list of 53 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (53 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	12,137	0	534,759
2	Aluminum oxide (fibrous forms)	1344-28-1	250	0	353,010
3	n-Hexane	110-54-3	116,540	0	117,040
4	tert-Butyl alcohol	75-65-0	467	0	93,900
5	Dimethylamine	124-40-3	228	0	91,985
6	Molybdenum trioxide	1313-27-5	2,770	482	79,984
7	Ethylene	74-85-1	72,650	0	72,650
8	Ammonia	7664-41-7	53,155	5	54,981
9	Diphenylamine	122-39-4	105	0	48,731
10	1,2,4-Trimethylbenzene	95-63-6	99	0	44,013
11	Toluene	108-88-3	14,063	0	40,774
12	Chloroacetic acid	79-11-8	476	0	20,694
13	Xylene (mixed isomers)	1330-20-7	635	0	13,936
14	Nickel And Nickel Compounds	N495	82	8	12,690
15	Nonylphenol Ethoxylates	N535	0	0	11,809
16	Propylene	115-07-1	10,535	0	10,535
17	Nitric acid	7697-37-2	9,490	5	9,500
18	Nickel compounds	N495	1,017	108	7,851
19	Vinyl acetate	108-05-4	2,418	0	7,117
20	Phenol	108-95-2	1,875	0	6,506
21	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
22	Cumene	98-82-8	2,616	0	5,324
23	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0	0	5,055
24	Hydroquinone	123-31-9	4,862	0	4,862
25	n-Butyl alcohol	71-36-3	1,007	0	4,538
26	Naphthalene	91-20-3	12	0	4,411
27	Methyl isobutyl ketone	108-10-1	3,997	0	3,997
28	Hydrogen sulfide	7783-06-4	3,596	0	3,596
29	sec-Butyl alcohol	78-92-2	93	0	3,447
30	Ethylene oxide	75-21-8	483	0	3,183
31	Ethylbenzene	100-41-4	275	0	2,913
32	Cobalt compounds	N096	455	36	2,816
33	Cumene hydroperoxide	80-15-9	0	0	1,560
34	Ethylene glycol	107-21-1	3	0	1,147
35	Acetaldehyde	75-07-0	494	0	1,132
36	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	622	1,122
37	Benzene	71-43-2	1,090	0	1,090
38	Chlorine	7782-50-5	961	0	961
39	Cobalt And Cobalt Compounds	N096	82	8	917
40	Formaldehyde	50-00-0	154	0	667
41	Maleic anhydride	108-31-6	178	0	578
42	Dimethyl phthalate	131-11-3	0	0	406
43	Methyl methacrylate	80-62-6	387	0	387
44	Styrene	100-42-5	374	0	374
45	Cyclohexane	110-82-7	24	0	315
46	Acrylic acid	79-10-7	186	0	192
47	Ethyl chloroformate	541-41-3	120	0	120
48	Lead And Lead Compounds	N420	16	1	68
49	Propylene oxide	75-56-9	61	0	61
50	Hydrazine	302-01-2	39	0	39
51	Benzoyl chloride	98-88-4	33	0	33
52	Phosgene	75-44-5	27	0	27
53	Methyl chlorocarbonate	79-22-1	13	0	13