📊 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

11310 N H ST LA PORTE 77571

Elevation

21.47 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: 11.47 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)

413 thousand lbs

Very High

63.4x 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)

413 thousand lbs

Very High

85.7x 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)

170 lbs

High

Most Houston properties have none nearby

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)	413,423 lbs	413,253 lbs	170 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	754,769 lbs	45,482 lbs	0 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):

Xylene (mixed isomers), Hydroquinone, Methanol, Propylene, Formaldehyde

View the full list of 38 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (38 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Xylene (mixed isomers)	1330-20-7	54,400 lbs	0 lbs	54,400 lbs
2	Hydroquinone	123-31-9	42,495 lbs	0 lbs	42,495 lbs
3	Methanol	67-56-1	41,849 lbs	0 lbs	41,849 lbs
4	Propylene	115-07-1	41,301 lbs	0 lbs	41,301 lbs
5	Formaldehyde	50-00-0	36,691 lbs	102 lbs	36,794 lbs
6	Methyl isobutyl ketone	108-10-1	36,313 lbs	0 lbs	36,313 lbs
7	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	33,058 lbs	0 lbs	33,058 lbs
8	Cumene	98-82-8	31,165 lbs	0 lbs	31,165 lbs
9	Ammonia	7664-41-7	18,956 lbs	68 lbs	19,024 lbs
10	Ethylene glycol	107-21-1	16,752 lbs	0 lbs	16,752 lbs
11	Chlorine	7782-50-5	11,230 lbs	0 lbs	11,230 lbs
12	Benzene	71-43-2	10,536 lbs	0 lbs	10,536 lbs
13	Styrene	100-42-5	7,344 lbs	0 lbs	7,344 lbs
14	Ethylene	74-85-1	7,000 lbs	0 lbs	7,000 lbs
15	Maleic anhydride	108-31-6	5,570 lbs	0 lbs	5,570 lbs
16	Chloroacetic acid	79-11-8	4,175 lbs	0 lbs	4,175 lbs
17	Mercury	7439-97-6	0 lbs	0 lbs	2,200 lbs
18	Phosgene	75-44-5	1,958 lbs	0 lbs	1,958 lbs
19	Aluminum oxide (fibrous forms)	1344-28-1	1,750 lbs	0 lbs	1,750 lbs
20	Ethyl chloroformate	541-41-3	1,467 lbs	0 lbs	1,467 lbs
21	Methyl chlorocarbonate	79-22-1	1,449 lbs	0 lbs	1,449 lbs
22	sec-Butyl alcohol	78-92-2	1,434 lbs	0 lbs	1,434 lbs
23	n-Butyl alcohol	71-36-3	1,165 lbs	0 lbs	1,165 lbs
24	Diphenylamine	122-39-4	997 lbs	0 lbs	997 lbs
25	1,2,4-Trimethylbenzene	95-63-6	971 lbs	0 lbs	971 lbs
26	Toluene	108-88-3	807 lbs	0 lbs	807 lbs
27	Ethylene oxide	75-21-8	791 lbs	0 lbs	791 lbs
28	Manganese	7439-96-5	511 lbs	0 lbs	511 lbs
29	Cyclohexane	110-82-7	377 lbs	0 lbs	377 lbs
30	Ethylbenzene	100-41-4	310 lbs	0 lbs	310 lbs
31	Naphthalene	91-20-3	278 lbs	0 lbs	278 lbs
32	Chloromethane	74-87-3	51 lbs	0 lbs	51 lbs
33	Chromium	7440-47-3	45 lbs	0 lbs	45 lbs
34	N,N-Dimethylformamide	68-12-2	34 lbs	0 lbs	34 lbs
35	Propylene oxide	75-56-9	14 lbs	0 lbs	14 lbs
36	Bis(2-chloroethyl) ether	111-44-4	3 lbs	0 lbs	3 lbs
37	Certain glycol ethers	N230	3 lbs	0 lbs	3 lbs
38	Methyl methacrylate	80-62-6	2 lbs	0 lbs	2 lbs

Top chemicals released near this property (2024 only):

Aluminum oxide (fibrous forms), Maleic anhydride, Methanol, 1,2,4-Trimethylbenzene, Chloroacetic acid

View the full list of 31 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (31 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Total (lbs/yr)
1	Aluminum oxide (fibrous forms)	1344-28-1	250 lbs	353,010 lbs
2	Maleic anhydride	108-31-6	1,569 lbs	135,289 lbs
3	Methanol	67-56-1	5,229 lbs	102,474 lbs
4	1,2,4-Trimethylbenzene	95-63-6	74 lbs	43,988 lbs
5	Chloroacetic acid	79-11-8	476 lbs	20,694 lbs
6	Xylene (mixed isomers)	1330-20-7	1,183 lbs	14,402 lbs
7	Toluene	108-88-3	16 lbs	13,930 lbs
8	Nonylphenol Ethoxylates	N535	0 lbs	11,809 lbs
9	Propylene	115-07-1	10,535 lbs	10,535 lbs
10	Formaldehyde	50-00-0	3,562 lbs	6,312 lbs
11	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
12	Cumene	98-82-8	2,616 lbs	5,324 lbs
13	Hydroquinone	123-31-9	4,862 lbs	4,862 lbs
14	Naphthalene	91-20-3	245 lbs	4,285 lbs
15	Methyl isobutyl ketone	108-10-1	3,997 lbs	3,997 lbs
16	sec-Butyl alcohol	78-92-2	93 lbs	3,447 lbs
17	Ethylbenzene	100-41-4	220 lbs	2,846 lbs
18	Ethylene oxide	75-21-8	63 lbs	2,763 lbs
19	n-Butyl alcohol	71-36-3	75 lbs	2,529 lbs
20	Ammonia	7664-41-7	897 lbs	1,323 lbs
21	Ethylene glycol	107-21-1	1 lbs	1,139 lbs
22	Chlorine	7782-50-5	1,121 lbs	1,121 lbs
23	Benzene	71-43-2	1,090 lbs	1,090 lbs
24	Ethylene	74-85-1	650 lbs	650 lbs
25	Cyclohexane	110-82-7	24 lbs	315 lbs
26	Ethyl chloroformate	541-41-3	120 lbs	120 lbs
27	Styrene	100-42-5	116 lbs	116 lbs
28	Diphenylamine	122-39-4	103 lbs	103 lbs
29	Phosgene	75-44-5	27 lbs	27 lbs
30	Methyl chlorocarbonate	79-22-1	13 lbs	13 lbs
31	Propylene oxide	75-56-9	1 lbs	1 lbs