Home > Analysis: 806 Robinson Rd, La Porte, TX 77571 10/24/2025

📊 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

806 ROBINSON RD LA PORTE 77571

Building Size

3,024 sqft

Total structure area from HCAD building records.

Elevation

26.85 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: 16.85 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

Very High

Higher pollution than 92% 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)

14.99 million lbs

Extremely High

2297.2x more than typical Houston property
≈ 749 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)

6.79 million lbs

Extremely High

1407.4x 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)

7.77 million 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)	14,987,607 lbs	6,787,148 lbs	7,766,133 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	2,898,613 lbs	502,363 lbs	672,384 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 92% of Houston homes

Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 0-9th percentile (top 10% most polluted).

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

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Methanol, Vinyl acetate, Propylene

View the full list of 56 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (56 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	7,046,578	7,046,578
2	Ethylene	74-85-1	2,254,316	0	2,254,316
3	Methanol	67-56-1	1,008,485	653,326	1,920,811
4	Vinyl acetate	108-05-4	1,175,529	5,684	1,318,823
5	Propylene	115-07-1	1,094,429	0	1,094,429
6	n-Hexane	110-54-3	511,036	0	511,036
7	Ammonia	7664-41-7	239,837	12,191	252,028
8	Certain glycol ethers	N230	63,696	0	63,696
9	Xylene (mixed isomers)	1330-20-7	43,900	0	58,245
10	Toluene	108-88-3	54,250	33	54,282
11	1,3-Butadiene	106-99-0	50,362	0	50,362
12	Methyl iodide	74-88-4	37,993	0	37,993
13	Chlorine	7782-50-5	34,156	3,421	37,577
14	Acetaldehyde	75-07-0	30,448	0	36,678
15	Formaldehyde	50-00-0	36,646	0	36,646
16	Sodium nitrite	7632-00-0	0	26,012	26,012
17	Zinc compounds	N982	6,213	18,100	24,313
18	Benzene	71-43-2	19,821	42	19,863
19	Ethylene glycol	107-21-1	16,751	0	16,751
20	Chlorobenzene	108-90-7	16,036	0	16,036
21	Hydroquinone	123-31-9	0	0	14,940
22	Cyclohexane	110-82-7	14,194	0	14,194
23	Boron trifluoride	7637-07-2	14,190	0	14,190
24	Chloroethane	75-00-3	13,375	0	13,375
25	N,N-Dimethylformamide	68-12-2	9,020	0	9,020
26	Dimethylamine	124-40-3	7,035	0	7,035
27	Isoprene	78-79-5	5,909	0	5,909
28	Maleic anhydride	108-31-6	5,569	0	5,569
29	Dichloromethane	75-09-2	5,437	0	5,437
30	Acetonitrile	75-05-8	5,326	0	5,326
31	Diisocyanates	N120	4,276	0	4,276
32	Mercury	7439-97-6	0	0	2,200
33	Di(2-ethylhexyl) phthalate	117-81-7	2,020	0	2,020
34	Aluminum oxide (fibrous forms)	1344-28-1	1,750	0	1,750
35	Styrene	100-42-5	1,209	0	1,209
36	Hydrogen fluoride	7664-39-3	1,062	0	1,062
37	Naphthalene	91-20-3	493	33	526
38	Aluminum (fume or dust)	7429-90-5	462	0	462
39	Ethylbenzene	100-41-4	391	32	423
40	Methyl methacrylate	80-62-6	385	0	385
41	Chloromethane	74-87-3	326	0	326
42	Dicyclopentadiene	77-73-6	290	0	290
43	Manganese	7439-96-5	0	282	282
44	Nitric acid	7697-37-2	260	0	260
45	Hexazinone	51235-04-2	0	212	212
46	Nickel	7440-02-0	0	152	152
47	n-Butyl alcohol	71-36-3	87	0	87
48	Chromium	7440-47-3	45	25	70
49	sec-Butyl alcohol	78-92-2	68	0	68
50	Methyl acrylate	96-33-3	55	0	55
51	Lead	7439-92-1	0	10	10
52	Polycyclic aromatic compounds	N590	7	0	7
53	Mercury compounds	N458	2	0	2
54	Benzo[g,h,i]perylene	191-24-2	0	1	1
55	Methyl isocyanate	624-83-9	1	0	1
56	Mercury And Mercury Compounds	N458	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Aluminum oxide (fibrous forms), Ethylene, Maleic anhydride

View the full list of 38 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (38 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	70,251	64,010	1,305,476
2	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	607,579	607,579
3	Aluminum oxide (fibrous forms)	1344-28-1	250	0	353,010
4	Ethylene	74-85-1	143,550	0	143,550
5	Maleic anhydride	108-31-6	1,569	0	134,889
6	Vinyl acetate	108-05-4	88,580	410	102,853
7	Propylene	115-07-1	97,954	0	97,954
8	Ammonia	7664-41-7	29,391	121	67,904
9	n-Hexane	110-54-3	42,070	0	43,412
10	Formaldehyde	50-00-0	3,559	0	5,799
11	Polycyclic aromatic compounds	N590	3	0	5,276
12	Chlorine	7782-50-5	3,660	0	3,660
13	Zinc compounds	N982	426	233	3,305
14	Certain glycol ethers	N230	3,026	0	3,026
15	1,3-Butadiene	106-99-0	2,958	0	2,958
16	Toluene	108-88-3	1,859	3	2,815
17	Cyclohexane	110-82-7	1,726	0	2,621
18	Benzene	71-43-2	1,725	3	2,171
19	Diisocyanates	N120	1,843	0	1,843
20	Methyl iodide	74-88-4	1,600	0	1,600
21	Chloroethane	75-00-3	1,429	0	1,429
22	Boron trifluoride	7637-07-2	1,192	0	1,192
23	Xylene (mixed isomers)	1330-20-7	1,144	0	1,144
24	Acetaldehyde	75-07-0	590	0	595
25	Isoprene	78-79-5	578	0	578
26	N,N-Dimethylformamide	68-12-2	570	0	570
27	Lead	7439-92-1	0	5	457
28	Ethylbenzene	100-41-4	358	2	365
29	Naphthalene	91-20-3	270	18	288
30	Styrene	100-42-5	141	0	155
31	Benzo[g,h,i]perylene	191-24-2	0	0	38
32	Dicyclopentadiene	77-73-6	30	0	30
33	Aluminum (fume or dust)	7429-90-5	26	0	26
34	Nitric acid	7697-37-2	20	0	20
35	Mercury And Mercury Compounds	N458	1	0	12
36	n-Butyl alcohol	71-36-3	7	0	7
37	sec-Butyl alcohol	78-92-2	5	0	5
38	Ethylene glycol	107-21-1	1	0	1