Home > Analysis: 3826 Pecan Cir, La Porte, TX 77571 03/06/2025

📊 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

3826 PECAN CIR LA PORTE 77571

Building Size

2,134 sqft

Total structure area from HCAD building records.

Elevation

19.48 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: 9.48 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)

6.62 million lbs

Extremely High

1015.3x more than typical Houston property
≈ 331 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)

6.6 million lbs

Extremely High

1368.9x 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)	6,624,254 lbs	6,601,231 lbs	16,336 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	3,960,438 lbs	511,815 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):

Ethylene, n-Hexane, Methanol, Ammonia, Vinyl acetate

View the full list of 79 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (79 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Ethylene	74-85-1	1,123,072	0	1,123,072
2	n-Hexane	110-54-3	1,091,770	0	1,091,770
3	Methanol	67-56-1	841,056	0	847,583
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	437,798	0	437,798
7	Nitric acid	7697-37-2	397,668	55	397,748
8	Ethylene oxide	75-21-8	155,592	0	155,592
9	Ethylene glycol	107-21-1	136,955	0	136,955
10	Acetaldehyde	75-07-0	119,011	0	119,011
11	Acrylic acid	79-10-7	103,139	0	103,139
12	Propylene	115-07-1	97,894	0	97,894
13	n-Butyl alcohol	71-36-3	92,772	0	92,772
14	Acrylonitrile	107-13-1	83,639	0	83,639
15	Certain glycol ethers	N230	49,151	0	49,152
16	Hydroquinone	123-31-9	44,758	0	44,758
17	Molybdenum trioxide	1313-27-5	37,655	3,227	40,897
18	Butyl acrylate	141-32-2	39,999	0	39,999
19	Chlorodifluoromethane (HCFC-22)	75-45-6	38,792	0	38,792
20	Ethyl acrylate	140-88-5	37,048	0	37,048
21	Methyl isobutyl ketone	108-10-1	36,313	0	36,313
22	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
23	Hydrogen sulfide	7783-06-4	31,678	0	31,678
24	Cumene	98-82-8	31,173	0	31,173
25	Phenol	108-95-2	30,497	0	30,497
26	Methyl acrylate	96-33-3	23,024	0	23,024
27	Xylene (mixed isomers)	1330-20-7	22,722	0	22,722
28	Propylene oxide	75-56-9	18,733	0	18,733
29	Styrene	100-42-5	13,938	0	13,938
30	Nickel compounds	N495	11,795	1,905	13,715
31	2-Methoxyethanol	109-86-4	11,669	0	11,669
32	Benzene	71-43-2	10,536	0	10,536
33	Chlorine	7782-50-5	10,430	0	10,430
34	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	30	9,885	9,930
35	Chloroethane	75-00-3	9,070	0	9,070
36	tert-Butyl alcohol	75-65-0	6,860	0	6,860
37	Cobalt compounds	N096	5,871	886	6,772
38	2-Ethoxyethanol	110-80-5	6,044	0	6,044
39	Diphenylamine	122-39-4	5,938	0	5,938
40	Ethylbenzene	100-41-4	5,307	0	5,307
41	Methyl iodide	74-88-4	5,089	0	5,089
42	Nickel And Nickel Compounds	N495	4,878	62	4,940
43	Formaldehyde	50-00-0	4,627	102	4,729
44	Cobalt And Cobalt Compounds	N096	4,551	42	4,593
45	Chloroacetic acid	79-11-8	4,175	0	4,175
46	Dimethylamine	124-40-3	3,754	0	3,754
47	Allyl alcohol	107-18-6	3,389	0	3,389
48	Methyl methacrylate	80-62-6	3,052	0	3,052
49	1,2-Butylene oxide	106-88-7	2,348	0	2,348
50	Acrolein	107-02-8	2,268	0	2,268
51	Phosgene	75-44-5	1,958	0	1,958
52	Maleic anhydride	108-31-6	1,577	0	1,577
53	Ethyl chloroformate	541-41-3	1,467	0	1,467
54	Methyl chlorocarbonate	79-22-1	1,449	0	1,449
55	sec-Butyl alcohol	78-92-2	1,434	0	1,434
56	Dicyclopentadiene	77-73-6	1,178	0	1,178
57	1,2,4-Trimethylbenzene	95-63-6	1,065	0	1,065
58	Nonylphenol	N530	1,013	0	1,013
59	Nonylphenol Ethoxylates	N535	1,008	0	1,008
60	Cyclohexane	110-82-7	898	0	898
61	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	597	0	597
62	Benzoyl chloride	98-88-4	469	0	469
63	Hydrazine	302-01-2	437	0	437
64	Lead And Lead Compounds	N420	211	10	221
65	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	145	30	175
66	Lead compounds	N420	138	4	142
67	Copper compounds	N100	132	6	138
68	Naphthalene	91-20-3	96	0	96
69	Cyanide compounds	N106	5	0	58
70	Chloromethane	74-87-3	51	0	51
71	N,N-Dimethylformamide	68-12-2	34	0	34
72	Phthalic anhydride	85-44-9	13	0	13
73	Zinc compounds	N982	5	0	5
74	Bis(2-chloroethyl) ether	111-44-4	3	0	3
75	Manganese And Manganese Compounds	N450	3	0	3
76	Cumene hydroperoxide	80-15-9	2	0	2
77	Nickel	7440-02-0	2	0	2
78	Formic acid	64-18-6	1	0	1
79	Boron trifluoride	7637-07-2	1	0	1

Top chemicals released near this property (2024 only):

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

View the full list of 69 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (69 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	41,704	0	1,015,294
2	Ethylene glycol	107-21-1	8,941	0	439,833
3	Ethyl acrylate	140-88-5	3,477	0	391,250
4	Acrylic acid	79-10-7	11,887	0	339,440
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	14,538	0	118,527
9	Ethylene	74-85-1	112,842	0	112,842
10	tert-Butyl alcohol	75-65-0	493	0	109,357
11	Nonylphenol Ethoxylates	N535	131	0	93,342
12	Dimethylamine	124-40-3	341	0	92,098
13	Ammonia	7664-41-7	87,209	5	89,034
14	n-Butyl alcohol	71-36-3	2,910	0	83,003
15	Molybdenum trioxide	1313-27-5	2,770	482	79,984
16	Acetaldehyde	75-07-0	4,403	0	78,746
17	Diphenylamine	122-39-4	105	0	48,731
18	1,2,4-Trimethylbenzene	95-63-6	99	0	44,035
19	Butyl acrylate	141-32-2	2,678	0	43,665
20	Xylene (mixed isomers)	1330-20-7	723	0	39,275
21	Copper	7440-50-8	0	0	27,230
22	Chloroacetic acid	79-11-8	476	0	20,694
23	Ethylene oxide	75-21-8	9,498	0	20,321
24	Styrene	100-42-5	530	0	17,694
25	Methyl acrylate	96-33-3	2,867	0	17,363
26	Certain glycol ethers	N230	3,532	0	13,299
27	Nickel And Nickel Compounds	N495	82	8	12,690
28	Propylene	115-07-1	12,098	0	12,098
29	Chloroethane	75-00-3	3,424	0	9,649
30	Nitric acid	7697-37-2	9,490	5	9,500
31	Nickel compounds	N495	1,017	108	7,851
32	Dicyclopentadiene	77-73-6	97	0	7,551
33	Hydroquinone	123-31-9	6,585	0	6,585
34	Phenol	108-95-2	1,875	0	6,506
35	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
36	Cumene	98-82-8	2,616	0	5,324
37	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0	0	5,055
38	Naphthalene	91-20-3	12	0	4,436
39	Methyl isobutyl ketone	108-10-1	3,997	0	3,997
40	Hydrogen sulfide	7783-06-4	3,596	0	3,596
41	sec-Butyl alcohol	78-92-2	93	0	3,447
42	Ethylbenzene	100-41-4	275	0	2,926
43	Cobalt compounds	N096	455	36	2,816
44	Acrolein	107-02-8	1,224	0	1,784
45	Cumene hydroperoxide	80-15-9	0	0	1,560
46	Formaldehyde	50-00-0	951	0	1,464
47	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	622	1,122
48	Benzene	71-43-2	1,090	0	1,090
49	2-Methoxyethanol	109-86-4	1,027	0	1,045
50	Chlorine	7782-50-5	961	0	961
51	Methyl iodide	74-88-4	958	0	958
52	Cobalt And Cobalt Compounds	N096	82	8	917
53	Propylene oxide	75-56-9	469	0	633
54	Maleic anhydride	108-31-6	186	0	592
55	2-Ethoxyethanol	110-80-5	407	0	429
56	Dimethyl phthalate	131-11-3	0	0	406
57	Methyl methacrylate	80-62-6	387	0	391
58	Cyclohexane	110-82-7	65	0	356
59	Nonylphenol	N530	1	0	224
60	Ethyl chloroformate	541-41-3	120	0	120
61	Lead And Lead Compounds	N420	16	1	68
62	1,2-Butylene oxide	106-88-7	52	0	52
63	Hydrazine	302-01-2	39	0	39
64	Benzoyl chloride	98-88-4	33	0	33
65	Phosgene	75-44-5	27	0	27
66	Methyl chlorocarbonate	79-22-1	13	0	13
67	Acrylonitrile	107-13-1	0	0	4
68	Manganese And Manganese Compounds	N450	3	0	3
69	Aniline	62-53-3	0	0	2