Home > Analysis: 509 Seagrove St, Shoreacres, TX 77571 11/25/2024

📊 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

509 SEAGROVE AVE SHOREACRES 77571

Building Size

2,612 sqft

Total structure area from HCAD building records.

Elevation

8.22 ft

Height above sea level from USGS data.

FEMA Flood Zone

High Risk - 1% annual chance with established base flood elevation

Overall Risk

High

Property flooded at 1.8ft depth. Risk based on flood depth at structure.

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

High

Flood Depth

1.78 ft ±0.5 ft

Depth of water above ground 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)

Based on HCAD building value of $185,340 (2,612 sqft). Using U.S. Army Corps of Engineers depth-damage curves.

Depth-Damage Estimate (Neighborhood Comparison)

No neighborhood valuation estimate available. Building exists (2,612 sqft) but no comparable neighborhood data found.

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 Flooded

Flood Depth: 1.78 feet
Severity: Minor

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.

This property is in a high-risk flood zone. Flood insurance is required for mortgages.
Consider flood mitigation measures like elevated utilities and flood vents.
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.
Simulation shows flooding at current water level - review property drainage and consider mitigation.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking

High

Higher pollution than 84% 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)

1.81 million lbs

Extremely High

278.1x more than typical Houston property
≈ 91 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)

1.81 million lbs

Extremely High

376.1x 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)

566 lbs

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)	1,814,443 lbs	1,813,877 lbs	566 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	1,041,497 lbs	138,631 lbs	51 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 84% 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, Methanol, Ammonia, Acrylic acid, Vinyl acetate

View the full list of 50 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (50 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Ethylene	74-85-1	339,184	0	339,184
2	Methanol	67-56-1	287,128	55	287,183
3	Ammonia	7664-41-7	265,454	0	265,454
4	Acrylic acid	79-10-7	247,770	0	247,770
5	Vinyl acetate	108-05-4	120,415	0	120,415
6	Benzene	71-43-2	115,467	0	115,467
7	Cyclohexane	110-82-7	102,600	0	102,600
8	Propylene oxide	75-56-9	78,945	0	78,945
9	Ethylbenzene	100-41-4	66,674	0	66,674
10	Styrene	100-42-5	51,437	0	51,437
11	Certain glycol ethers	N230	34,372	0	34,372
12	Isoprene	78-79-5	15,828	0	15,828
13	Propylene	115-07-1	15,687	0	15,687
14	1,3-Butadiene	106-99-0	14,544	0	14,544
15	Toluene	108-88-3	8,514	0	8,514
16	Formaldehyde	50-00-0	7,593	0	7,593
17	Trade Secret	TRD SECRT	5,905	88	5,993
18	1,2,4-Trimethylbenzene	95-63-6	4,474	0	4,474
19	Butyl acrylate	141-32-2	4,451	0	4,451
20	Xylene (mixed isomers)	1330-20-7	2,663	0	2,663
21	1,4-Dioxane	123-91-1	2,644	0	2,644
22	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	2,610	0	2,610
23	Acetaldehyde	75-07-0	2,587	0	2,587
24	Chlorine	7782-50-5	2,246	0	2,246
25	Formic acid	64-18-6	2,017	0	2,017
26	Acrylonitrile	107-13-1	1,977	0	1,977
27	Nonylphenol	N530	1,974	0	1,974
28	n-Hexane	110-54-3	1,735	0	1,735
29	Naphthalene	91-20-3	1,572	0	1,572
30	Nitric acid	7697-37-2	1,405	0	1,405
31	Ethylene glycol	107-21-1	1,078	0	1,078
32	Nonylphenol Ethoxylates	N535	773	0	773
33	Maleic anhydride	108-31-6	534	0	534
34	Acrolein	107-02-8	402	0	402
35	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	370	370
36	Hydroquinone	123-31-9	355	0	355
37	Benzyl chloride	100-44-7	228	0	228
38	Ethylene oxide	75-21-8	169	0	169
39	Diethanolamine	111-42-2	106	0	106
40	Diethyl sulfate	64-67-5	85	0	85
41	Zinc compounds	N982	48	33	81
42	n-Butyl alcohol	71-36-3	68	0	68
43	Epichlorohydrin	106-89-8	42	0	42
44	Antimony compounds	N010	20	15	35
45	Acetonitrile	75-05-8	33	0	33
46	Bis(2-chloroethyl) ether	111-44-4	26	0	26
47	2,4-Dimethylphenol	105-67-9	17	0	17
48	Cumene	98-82-8	15	0	15
49	Antimony And Antimony Compounds	N010	5	5	10
50	1,3-Phenylenediamine	108-45-2	2	0	2

Top chemicals released near this property (2024 only):

Methanol, Acrylic acid, Vinyl acetate, Nickel compounds, Xylene (mixed isomers)

View the full list of 39 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (39 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	15,367	5	497,442
2	Acrylic acid	79-10-7	20,841	0	124,064
3	Vinyl acetate	108-05-4	11,698	0	121,509
4	Nickel compounds	N495	0	0	74,741
5	Xylene (mixed isomers)	1330-20-7	363	0	39,094
6	Cyclohexane	110-82-7	8,060	0	29,370
7	Ethylene	74-85-1	24,775	0	24,775
8	Ammonia	7664-41-7	23,068	0	23,164
9	Acetaldehyde	75-07-0	2	0	21,995
10	Styrene	100-42-5	3,598	0	17,737
11	Ethylbenzene	100-41-4	4,042	0	15,706
12	Benzene	71-43-2	8,393	0	8,949
13	Propylene oxide	75-56-9	7,544	0	7,547
14	Toluene	108-88-3	587	0	4,245
15	Acetonitrile	75-05-8	24	0	4,091
16	Naphthalene	91-20-3	223	0	3,764
17	Ethylene glycol	107-21-1	103	0	2,932
18	Nonylphenol	N530	551	0	2,678
19	Isoprene	78-79-5	2,125	0	2,125
20	Certain glycol ethers	N230	421	0	2,084
21	Propylene	115-07-1	2,003	0	2,003
22	1,2,4-Trimethylbenzene	95-63-6	599	0	1,996
23	n-Hexane	110-54-3	160	0	1,995
24	Formic acid	64-18-6	175	0	1,197
25	1,3-Butadiene	106-99-0	1,187	0	1,187
26	Acrylonitrile	107-13-1	879	0	1,029
27	Formaldehyde	50-00-0	296	0	936
28	Butyl acrylate	141-32-2	848	0	848
29	Trade Secret	TRD SECRT	0	46	581
30	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	0	551
31	Benzyl chloride	100-44-7	119	0	379
32	Nitric acid	7697-37-2	217	0	217
33	Hydroquinone	123-31-9	23	0	185
34	1,4-Dioxane	123-91-1	126	0	126
35	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	119	0	119
36	Ethylene oxide	75-21-8	42	0	42
37	Acrolein	107-02-8	28	0	38
38	Antimony And Antimony Compounds	N010	0	0	33
39	Maleic anhydride	108-31-6	26	0	26