Home > Analysis: 7003 Purvis Ln, Baytown, TX 77521 04/14/2025

📊 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

7003 PURVIS LN BAYTOWN 77521

Elevation

29.35 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: 19.35 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 90% 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)

7.67 million lbs

Extremely High

1175.4x more than typical Houston property
≈ 383 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)

7.29 million lbs

Extremely High

1511.7x 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)

379 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)	7,668,718 lbs	7,290,137 lbs	378,581 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	1,337,965 lbs	1,169,182 lbs	30,565 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 90% 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):

Ethylene, Propylene, Ammonia, Nitrate compounds (water dissociable; reportable only when in aqueous solution), 1,3-Butadiene

View the full list of 26 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (26 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Ethylene	74-85-1	4,787,850	0	4,787,850
2	Propylene	115-07-1	690,562	0	690,562
3	Ammonia	7664-41-7	596,318	7,612	603,930
4	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	370,664	370,664
5	1,3-Butadiene	106-99-0	294,155	0	294,155
6	Benzene	71-43-2	242,812	305	243,117
7	n-Hexane	110-54-3	161,976	0	161,976
8	Xylene (mixed isomers)	1330-20-7	161,107	0	161,107
9	Toluene	108-88-3	85,947	0	85,947
10	Cyclohexane	110-82-7	63,264	0	63,264
11	Methanol	67-56-1	62,125	0	62,125
12	Ethylbenzene	100-41-4	56,880	0	56,880
13	Naphthalene	91-20-3	32,518	0	32,518
14	N,N-Dimethylformamide	68-12-2	19,581	0	19,581
15	Isoprene	78-79-5	16,125	0	16,125
16	Zinc compounds	N982	6,310	0	6,310
17	n-Butyl alcohol	71-36-3	5,759	0	5,759
18	Styrene	100-42-5	3,178	0	3,178
19	Biphenyl	92-52-4	1,179	0	1,179
20	Phenanthrene	85-01-8	1,002	0	1,002
21	1,2,4-Trimethylbenzene	95-63-6	907	0	907
22	Cumene	98-82-8	378	0	378
23	Dicyclopentadiene	77-73-6	169	0	169
24	Chlorine	7782-50-5	25	0	25
25	Boron trifluoride	7637-07-2	8	0	8
26	Anthracene	120-12-7	1	0	1

Top chemicals released near this property (2024 only):

Ethylene, Ammonia, Propylene, 1,3-Butadiene, n-Butyl alcohol

View the full list of 25 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (25 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Ethylene	74-85-1	834,208	0	834,208
2	Ammonia	7664-41-7	76,320	1,581	117,645
3	Propylene	115-07-1	81,916	0	81,916
4	1,3-Butadiene	106-99-0	81,011	0	81,011
5	n-Butyl alcohol	71-36-3	943	0	63,043
6	Benzene	71-43-2	42,134	0	50,592
7	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	28,984	28,984
8	n-Hexane	110-54-3	12,404	0	12,404
9	Naphthalene	91-20-3	1,912	0	12,149
10	Toluene	108-88-3	10,070	0	10,369
11	Xylene (mixed isomers)	1330-20-7	8,189	0	9,039
12	Lead compounds	N420	0	0	8,353
13	Cyclohexane	110-82-7	6,674	0	6,674
14	Ethylbenzene	100-41-4	2,904	0	6,411
15	Methanol	67-56-1	6,228	0	6,228
16	N,N-Dimethylformamide	68-12-2	1,881	0	1,881
17	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	0	0	1,731
18	Isoprene	78-79-5	1,515	0	1,515
19	Phenanthrene	85-01-8	72	0	1,489
20	Biphenyl	92-52-4	91	0	1,484
21	Zinc compounds	N982	368	0	374
22	Styrene	100-42-5	234	0	317
23	1,2,4-Trimethylbenzene	95-63-6	57	0	90
24	Cumene	98-82-8	51	0	53
25	Polycyclic aromatic compounds	N590	0	0	5