Home > Analysis: 413 N 3rd St, La Porte, TX 77571 02/05/2025

📊 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

413 N 3RD ST LA PORTE 77571

Building Size

2,167 sqft

Total structure area from HCAD building records.

Elevation

19.87 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: 9.87 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

Moderate

Higher pollution than 74% 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)

414 thousand lbs

Very High

63.5x more than typical Houston property
≈ 21 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)

414 thousand lbs

Very High

85.9x 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)

0 lbs

None

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
Typical Houston Property (2014-2024)	6,524 lbs	4,822 lbs
This Property (2014-2024)	414,137 lbs	414,137 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs
This Property (2024 Only)	432,400 lbs	49,513 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 74% of Houston homes

Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile (top 25% most polluted).

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

Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Methanol, Formaldehyde, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen fluoride

View the full list of 25 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (25 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Total (lbs, 10yr)
1	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	216,585	216,585
2	Methanol	67-56-1	52,798	52,798
3	Formaldehyde	50-00-0	36,646	36,646
4	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	33,058	33,058
5	Hydrogen fluoride	7664-39-3	17,939	17,939
6	Chlorine	7782-50-5	11,230	11,230
7	Xylene (mixed isomers)	1330-20-7	10,381	10,381
8	Ethylene	74-85-1	7,000	7,000
9	Propylene	115-07-1	4,500	4,500
10	Chloroacetic acid	79-11-8	4,175	4,175
11	Chlorobenzene	108-90-7	3,127	3,127
12	Phosgene	75-44-5	1,958	1,958
13	Acetonitrile	75-05-8	1,765	1,765
14	Aluminum oxide (fibrous forms)	1344-28-1	1,750	1,750
15	Methyl tert-butyl ether	1634-04-4	1,591	1,591
16	Triethylamine	121-44-8	1,515	1,515
17	Ethyl chloroformate	541-41-3	1,467	1,467
18	Methyl chlorocarbonate	79-22-1	1,449	1,449
19	sec-Butyl alcohol	78-92-2	1,434	1,434
20	Toluene	108-88-3	1,261	1,261
21	n-Butyl alcohol	71-36-3	1,164	1,164
22	N,N-Dimethylformamide	68-12-2	535	535
23	Manganese	7439-96-5	511	511
24	Dichloromethane	75-09-2	251	251
25	Chromium	7440-47-3	45	45

Top chemicals released near this property (2024 only):

Aluminum oxide (fibrous forms), Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Chloroacetic acid, Methanol, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 15 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (15 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Total (lbs/yr)
1	Aluminum oxide (fibrous forms)	1344-28-1	250	353,010
2	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	29,545	29,545
3	Chloroacetic acid	79-11-8	476	20,694
4	Methanol	67-56-1	5,090	6,952
5	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	6,255	6,255
6	Formaldehyde	50-00-0	3,559	5,799
7	sec-Butyl alcohol	78-92-2	93	3,447
8	n-Butyl alcohol	71-36-3	75	2,529
9	Hydrogen fluoride	7664-39-3	1,738	1,738
10	Chlorine	7782-50-5	1,121	1,121
11	Ethylene	74-85-1	650	650
12	Propylene	115-07-1	500	500
13	Ethyl chloroformate	541-41-3	120	120
14	Phosgene	75-44-5	27	27
15	Methyl chlorocarbonate	79-22-1	13	13