Home > Analysis: 3209 Earl St, Pasadena, TX 77503 04/24/2025

📊 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

3209 EARL ST PASADENA 77503

Building Size

1,808 sqft

Total structure area from HCAD building records.

Elevation

28.75 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: 18.75 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 88% 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)

4.92 million lbs

Extremely High

754.0x more than typical Houston property
≈ 246 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)

3.86 million lbs

Extremely High

799.5x 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)

1.06 million 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)	4,919,557 lbs	3,855,538 lbs	1,063,988 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	477,076 lbs	347,341 lbs	73,998 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 88% 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, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Cumene, Methanol, n-Hexane

View the full list of 55 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (55 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Ethylene	74-85-1	1,060,638	0	1,060,638
2	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	1,038,744	1,038,744
3	Cumene	98-82-8	518,059	11	518,071
4	Methanol	67-56-1	451,229	7,563	458,792
5	n-Hexane	110-54-3	412,892	170	413,063
6	Propylene	115-07-1	288,871	0	288,871
7	Acetophenone	98-86-2	206,492	3,645	210,136
8	Benzene	71-43-2	171,685	27	171,714
9	Vinyl chloride	75-01-4	166,976	14	166,990
10	Ammonia	7664-41-7	113,823	2,681	116,504
11	Acetaldehyde	75-07-0	98,856	3,956	102,812
12	Vinyl acetate	108-05-4	70,754	0	70,754
13	Toluene	108-88-3	53,613	27	53,649
14	Xylene (mixed isomers)	1330-20-7	48,626	33	48,668
15	1,2,4-Trimethylbenzene	95-63-6	40,441	105	40,549
16	Isobutyraldehyde	78-84-2	28,404	0	28,404
17	Butyraldehyde	123-72-8	23,130	0	23,130
18	Boron trifluoride	7637-07-2	14,843	0	14,843
19	Zinc compounds	N982	7,485	6,851	14,336
20	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	13,680	0	13,680
21	Phenol	108-95-2	13,534	4	13,538
22	Ethylbenzene	100-41-4	6,973	22	6,997
23	Dimethylamine	124-40-3	6,912	0	6,912
24	Chlorine	7782-50-5	6,477	0	6,477
25	Ethylene glycol	107-21-1	4,073	0	4,073
26	n-Butyl alcohol	71-36-3	4,032	0	4,032
27	Phthalic anhydride	85-44-9	3,545	0	3,545
28	Formaldehyde	50-00-0	3,345	0	3,345
29	Acrylonitrile	107-13-1	2,224	0	2,224
30	o-Cresol	95-48-7	1,985	0	1,985
31	Propylene oxide	75-56-9	1,829	0	1,829
32	Maleic anhydride	108-31-6	1,686	0	1,686
33	Formic acid	64-18-6	1,406	0	1,406
34	o-Xylene	95-47-6	1,330	0	1,330
35	Cyclohexane	110-82-7	1,073	0	1,073
36	Manganese compounds	N450	1,064	0	1,064
37	Naphthalene	91-20-3	1,012	21	1,034
38	1,3-Butadiene	106-99-0	938	0	938
39	Lead compounds	N420	288	22	309
40	Manganese And Manganese Compounds	N450	309	0	309
41	Diethanolamine	111-42-2	205	0	205
42	Nickel	7440-02-0	120	31	151
43	1,2-Dibromoethane	106-93-4	133	0	133
44	1,2-Dichloroethane	107-06-2	127	0	127
45	Diphenylamine	122-39-4	126	0	126
46	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
47	Lead And Lead Compounds	N420	55	22	78
48	Chromium	7440-47-3	40	33	73
49	Manganese	7439-96-5	70	0	70
50	Certain glycol ethers	N230	12	0	12
51	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	11	0	11
52	Methyl tert-butyl ether	1634-04-4	2	5	10
53	Polycyclic aromatic compounds	N590	2	2	4
54	Piperonyl butoxide	51-03-6	4	0	4
55	Mercury And Mercury Compounds	N458	1	0	1

Top chemicals released near this property (2024 only):

Ethylene, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Propylene, Methanol, Cumene

View the full list of 46 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (46 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Ethylene	74-85-1	115,347	0	115,347
2	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	72,435	72,435
3	Propylene	115-07-1	57,757	0	57,757
4	Methanol	67-56-1	19,060	336	46,187
5	Cumene	98-82-8	35,001	0	35,140
6	Ammonia	7664-41-7	12,947	0	21,415
7	Benzene	71-43-2	19,530	2	19,533
8	Acetophenone	98-86-2	17,719	350	18,069
9	Vinyl chloride	75-01-4	13,207	1	13,208
10	n-Hexane	110-54-3	12,725	0	12,731
11	Zinc compounds	N982	678	476	9,871
12	Acetaldehyde	75-07-0	8,345	380	8,725
13	Phenol	108-95-2	4,579	0	5,952
14	Vinyl acetate	108-05-4	5,850	0	5,852
15	Toluene	108-88-3	3,102	3	4,948
16	1,2,4-Trimethylbenzene	95-63-6	4,078	0	4,777
17	Isobutyraldehyde	78-84-2	4,431	0	4,431
18	Xylene (mixed isomers)	1330-20-7	3,736	5	3,880
19	Formaldehyde	50-00-0	354	0	3,326
20	Butyraldehyde	123-72-8	2,507	0	2,507
21	Formic acid	64-18-6	189	0	1,968
22	Boron trifluoride	7637-07-2	1,178	0	1,178
23	o-Cresol	95-48-7	88	0	1,122
24	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	1	0	1,095
25	Dimethylamine	124-40-3	864	0	884
26	n-Butyl alcohol	71-36-3	638	0	638
27	Ethylene glycol	107-21-1	588	0	608
28	Chlorine	7782-50-5	487	0	487
29	Ethylbenzene	100-41-4	427	3	430
30	Perfluorooctanoic acid	335-67-1	0	0	402
31	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	395	0	395
32	1,3-Butadiene	106-99-0	295	0	295
33	Acrylonitrile	107-13-1	278	0	294
34	Maleic anhydride	108-31-6	132	0	281
35	Propylene oxide	75-56-9	255	0	255
36	Cyclohexane	110-82-7	232	0	232
37	Naphthalene	91-20-3	132	1	133
38	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
39	Lead And Lead Compounds	N420	8	1	70
40	Chromium	7440-47-3	25	2	33
41	Nickel	7440-02-0	24	2	30
42	Manganese	7439-96-5	30	0	30
43	Diphenylamine	122-39-4	23	0	23
44	1,2-Dibromoethane	106-93-4	4	0	4
45	Certain glycol ethers	N230	1	0	1
46	Polycyclic aromatic compounds	N590	0	0	1