Home > Analysis: 9806 Brookside Dr, La Porte, TX 77571 08/29/2025

📊 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

9806 BROOKSIDE DR LA PORTE 77571

Building Size

2,272 sqft

Total structure area from HCAD building records.

Elevation

25.64 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: 15.64 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 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)

1.91 million lbs

Extremely High

292.1x more than typical Houston property
≈ 95 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)

1.91 million lbs

Extremely High

395.2x 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)

407 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)	1,906,064 lbs	1,905,657 lbs	407 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	346,626 lbs	165,444 lbs	23 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):

Propylene, n-Hexane, Ethylene, Ammonia, Certain glycol ethers

View the full list of 21 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (21 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Propylene	115-07-1	891,483	0	891,483
2	n-Hexane	110-54-3	433,619	0	433,619
3	Ethylene	74-85-1	287,527	0	287,527
4	Ammonia	7664-41-7	86,761	0	86,761
5	Certain glycol ethers	N230	63,696	0	63,696
6	Xylene (mixed isomers)	1330-20-7	43,144	0	43,144
7	Ethylene glycol	107-21-1	16,751	0	16,751
8	Chlorobenzene	108-90-7	16,036	0	16,036
9	Boron trifluoride	7637-07-2	14,190	0	14,190
10	Chloroethane	75-00-3	13,375	0	13,375
11	Cyclohexane	110-82-7	12,948	0	12,948
12	Zinc compounds	N982	6,213	407	6,620
13	Toluene	108-88-3	5,877	0	5,877
14	Maleic anhydride	108-31-6	5,569	0	5,569
15	Diisocyanates	N120	4,276	0	4,276
16	Di(2-ethylhexyl) phthalate	117-81-7	2,020	0	2,020
17	Isoprene	78-79-5	923	0	923
18	Aluminum (fume or dust)	7429-90-5	462	0	462
19	Chloromethane	74-87-3	326	0	326
20	Naphthalene	91-20-3	245	0	245
21	Ethylbenzene	100-41-4	216	0	216

Top chemicals released near this property (2024 only):

Maleic anhydride, Propylene, Ammonia, n-Hexane, Ethylene

View the full list of 19 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (19 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Maleic anhydride	108-31-6	1,569	0	134,889
2	Propylene	115-07-1	83,354	0	83,354
3	Ammonia	7664-41-7	5,791	0	44,183
4	n-Hexane	110-54-3	31,953	0	33,295
5	Ethylene	74-85-1	30,290	0	30,290
6	Polycyclic aromatic compounds	N590	0	0	3,621
7	Zinc compounds	N982	426	23	3,095
8	Certain glycol ethers	N230	3,026	0	3,026
9	Cyclohexane	110-82-7	1,566	0	2,461
10	Toluene	108-88-3	1,372	0	2,277
11	Diisocyanates	N120	1,843	0	1,843
12	Chloroethane	75-00-3	1,429	0	1,429
13	Boron trifluoride	7637-07-2	1,192	0	1,192
14	Xylene (mixed isomers)	1330-20-7	1,144	0	1,144
15	Naphthalene	91-20-3	245	0	245
16	Ethylbenzene	100-41-4	216	0	216
17	Benzo[g,h,i]perylene	191-24-2	0	0	38
18	Aluminum (fume or dust)	7429-90-5	26	0	26
19	Ethylene glycol	107-21-1	1	0	1