Home > Analysis: 9421 Rustic Gate Rd, 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

9421 RUSTIC GATE RD LA PORTE 77571

Building Size

3,724 sqft

Total structure area from HCAD building records.

Elevation

25.28 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: 15.28 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 80% 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)

956 thousand lbs

Extremely High

146.5x more than typical Houston property
≈ 48 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)

933 thousand lbs

Extremely High

193.4x 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)

16 thousand lbs

Extremely 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)	955,599 lbs	932,577 lbs	16,336 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	885,545 lbs	66,051 lbs	1,275 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 80% 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):

Nitric acid, Ammonia, Molybdenum trioxide, Hydrogen sulfide, Methanol

View the full list of 40 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (40 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Nitric acid	7697-37-2	397,654	55	397,734
2	Ammonia	7664-41-7	395,794	123	395,937
3	Molybdenum trioxide	1313-27-5	37,655	3,227	40,897
4	Hydrogen sulfide	7783-06-4	31,678	0	31,678
5	Methanol	67-56-1	9,356	0	15,883
6	Nickel compounds	N495	11,795	1,904	13,714
7	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	30	9,885	9,930
8	Certain glycol ethers	N230	9,458	0	9,459
9	n-Hexane	110-54-3	7,167	0	7,167
10	Cobalt compounds	N096	5,871	886	6,772
11	Nickel And Nickel Compounds	N495	4,878	62	4,940
12	Cobalt And Cobalt Compounds	N096	4,551	42	4,593
13	Toluene	108-88-3	2,689	0	2,689
14	Xylene (mixed isomers)	1330-20-7	2,454	0	2,454
15	Ethylene oxide	75-21-8	2,160	0	2,160
16	Propylene oxide	75-56-9	1,981	0	1,981
17	Dimethylamine	124-40-3	1,745	0	1,745
18	Nonylphenol	N530	1,013	0	1,013
19	Nonylphenol Ethoxylates	N535	1,008	0	1,008
20	1,2,4-Trimethylbenzene	95-63-6	971	0	971
21	Cyclohexane	110-82-7	857	0	857
22	Maleic anhydride	108-31-6	612	0	612
23	Lead And Lead Compounds	N420	211	10	221
24	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	145	30	175
25	Bifenthrin	82657-04-3	149	0	149
26	Formaldehyde	50-00-0	46	102	148
27	Lead compounds	N420	138	4	142
28	Copper compounds	N100	132	6	138
29	Ethylbenzene	100-41-4	94	0	94
30	Diphenylamine	122-39-4	87	0	87
31	Cumene	98-82-8	68	0	68
32	Cyanide compounds	N106	5	0	58
33	Chloromethane	74-87-3	51	0	51
34	Naphthalene	91-20-3	33	0	33
35	tert-Butyl alcohol	75-65-0	23	0	23
36	Oxyfluorfen	42874-03-3	10	0	10
37	Bis(2-chloroethyl) ether	111-44-4	3	0	3
38	Methyl methacrylate	80-62-6	2	0	2
39	Ethylene glycol	107-21-1	1	0	1
40	n-Butyl alcohol	71-36-3	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Nonylphenol Ethoxylates, Molybdenum trioxide, Ammonia, 1,2,4-Trimethylbenzene

View the full list of 33 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (33 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	1,986	0	510,450
2	Nonylphenol Ethoxylates	N535	131	0	93,342
3	Molybdenum trioxide	1313-27-5	2,770	482	79,984
4	Ammonia	7664-41-7	44,465	5	46,065
5	1,2,4-Trimethylbenzene	95-63-6	74	0	44,010
6	Copper	7440-50-8	0	0	27,230
7	Toluene	108-88-3	16	0	14,037
8	Xylene (mixed isomers)	1330-20-7	39	0	13,258
9	Nickel And Nickel Compounds	N495	82	8	12,690
10	Nitric acid	7697-37-2	9,488	5	9,498
11	Nickel compounds	N495	1,017	108	7,851
12	Naphthalene	91-20-3	0	0	4,065
13	Hydrogen sulfide	7783-06-4	3,596	0	3,596
14	Cobalt compounds	N096	455	36	2,816
15	Ethylene oxide	75-21-8	70	0	2,770
16	Cumene	98-82-8	4	0	2,713
17	Ethylbenzene	100-41-4	4	0	2,643
18	Styrene	100-42-5	0	0	1,734
19	Ethylene glycol	107-21-1	0	0	1,138
20	Certain glycol ethers	N230	961	0	1,125
21	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	622	1,122
22	Cobalt And Cobalt Compounds	N096	82	8	917
23	n-Hexane	110-54-3	607	0	631
24	Formaldehyde	50-00-0	3	0	513
25	Maleic anhydride	108-31-6	8	0	414
26	Cyclohexane	110-82-7	24	0	315
27	Nonylphenol	N530	1	0	224
28	Propylene oxide	75-56-9	39	0	203
29	Dimethylamine	124-40-3	113	0	113
30	Lead And Lead Compounds	N420	16	1	68
31	Methyl methacrylate	80-62-6	0	0	4
32	Acrylonitrile	107-13-1	0	0	4
33	Aniline	62-53-3	0	0	2