📊 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

112 N HOLMES ST LA PORTE 77571

Elevation

15.34 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)

Vacant lot (no building data). No structure to calculate damage for.

Depth-Damage Estimate (Neighborhood Comparison)

Vacant lot (no building data). No structure to calculate damage for.

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: 5.34 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 73% 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)

337 thousand lbs

Very High

51.7x more than typical Houston property
≈ 17 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)

337 thousand lbs

Very High

69.9x 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)	337,172 lbs	337,172 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs
This Property (2024 Only)	68,337 lbs	40,463 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 73% 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), Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen fluoride, Methanol, Chlorine

View the full list of 22 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (22 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 lbs	216,585 lbs
2	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	33,058 lbs	33,058 lbs
3	Hydrogen fluoride	7664-39-3	17,939 lbs	17,939 lbs
4	Methanol	67-56-1	15,073 lbs	15,073 lbs
5	Chlorine	7782-50-5	10,430 lbs	10,430 lbs
6	Xylene (mixed isomers)	1330-20-7	10,381 lbs	10,381 lbs
7	Ethylene	74-85-1	7,000 lbs	7,000 lbs
8	Propylene	115-07-1	4,500 lbs	4,500 lbs
9	Chloroacetic acid	79-11-8	4,175 lbs	4,175 lbs
10	Chlorobenzene	108-90-7	3,127 lbs	3,127 lbs
11	Phosgene	75-44-5	1,958 lbs	1,958 lbs
12	Acetonitrile	75-05-8	1,765 lbs	1,765 lbs
13	Methyl tert-butyl ether	1634-04-4	1,591 lbs	1,591 lbs
14	Triethylamine	121-44-8	1,515 lbs	1,515 lbs
15	Ethyl chloroformate	541-41-3	1,467 lbs	1,467 lbs
16	Methyl chlorocarbonate	79-22-1	1,449 lbs	1,449 lbs
17	sec-Butyl alcohol	78-92-2	1,434 lbs	1,434 lbs
18	Toluene	108-88-3	1,261 lbs	1,261 lbs
19	n-Butyl alcohol	71-36-3	1,164 lbs	1,164 lbs
20	N,N-Dimethylformamide	68-12-2	535 lbs	535 lbs
21	Manganese	7439-96-5	511 lbs	511 lbs
22	Dichloromethane	75-09-2	251 lbs	251 lbs

Top chemicals released near this property (2024 only):

Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Chloroacetic acid, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), sec-Butyl alcohol, n-Butyl alcohol

View the full list of 13 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (13 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Total (lbs/yr)
1	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	29,545 lbs	29,545 lbs
2	Chloroacetic acid	79-11-8	476 lbs	20,694 lbs
3	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	6,255 lbs	6,255 lbs
4	sec-Butyl alcohol	78-92-2	93 lbs	3,447 lbs
5	n-Butyl alcohol	71-36-3	75 lbs	2,529 lbs
6	Methanol	67-56-1	9 lbs	1,858 lbs
7	Hydrogen fluoride	7664-39-3	1,738 lbs	1,738 lbs
8	Chlorine	7782-50-5	961 lbs	961 lbs
9	Ethylene	74-85-1	650 lbs	650 lbs
10	Propylene	115-07-1	500 lbs	500 lbs
11	Ethyl chloroformate	541-41-3	120 lbs	120 lbs
12	Phosgene	75-44-5	27 lbs	27 lbs
13	Methyl chlorocarbonate	79-22-1	13 lbs	13 lbs