Home > Analysis: 3618 Washington St, Pasadena, TX 77503 01/31/2025

📊 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

3618 WASHINGTON ST PASADENA 77503

Building Size

1,730 sqft

Total structure area from HCAD building records.

Elevation

27.64 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: 17.64 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 87% 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)

3.49 million lbs

Extremely High

534.4x more than typical Houston property
≈ 174 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)

2.43 million lbs

Extremely High

503.8x 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)	3,486,660 lbs	2,429,491 lbs	1,057,138 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	371,448 lbs	254,250 lbs	73,522 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 87% 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):

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

View the full list of 53 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (53 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	1,038,744	1,038,744
2	Cumene	98-82-8	518,059	11	518,071
3	Methanol	67-56-1	450,708	7,563	458,271
4	Propylene	115-07-1	288,871	0	288,871
5	Acetophenone	98-86-2	206,492	3,645	210,136
6	Benzene	71-43-2	171,685	27	171,714
7	Vinyl chloride	75-01-4	166,976	14	166,990
8	Ammonia	7664-41-7	113,823	2,681	116,504
9	Acetaldehyde	75-07-0	98,856	3,956	102,812
10	Vinyl acetate	108-05-4	70,754	0	70,754
11	Xylene (mixed isomers)	1330-20-7	48,626	33	48,668
12	Ethylene	74-85-1	40,872	0	40,872
13	1,2,4-Trimethylbenzene	95-63-6	40,441	105	40,549
14	Toluene	108-88-3	32,691	27	32,727
15	n-Hexane	110-54-3	30,503	170	30,674
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	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
20	Phenol	108-95-2	13,534	4	13,538
21	Ethylbenzene	100-41-4	6,973	22	6,997
22	Dimethylamine	124-40-3	6,912	0	6,912
23	Chlorine	7782-50-5	6,477	0	6,477
24	Zinc compounds	N982	5,277	0	5,277
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	1,2-Dibromoethane	106-93-4	133	0	133
43	1,2-Dichloroethane	107-06-2	127	0	127
44	Diphenylamine	122-39-4	126	0	126
45	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
46	Lead And Lead Compounds	N420	55	22	78
47	Chromium	7440-47-3	0	33	33
48	Nickel	7440-02-0	0	31	31
49	Certain glycol ethers	N230	12	0	12
50	Methyl tert-butyl ether	1634-04-4	2	5	10
51	Polycyclic aromatic compounds	N590	2	2	4
52	Piperonyl butoxide	51-03-6	4	0	4
53	Mercury And Mercury Compounds	N458	1	0	1

Top chemicals released near this property (2024 only):

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

View the full list of 43 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (43 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	72,435	72,435
2	Propylene	115-07-1	57,757	0	57,757
3	Methanol	67-56-1	19,060	336	46,187
4	Cumene	98-82-8	35,001	0	35,140
5	Ethylene	74-85-1	31,339	0	31,339
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	Acetaldehyde	75-07-0	8,345	380	8,725
11	Phenol	108-95-2	4,579	0	5,952
12	Vinyl acetate	108-05-4	5,850	0	5,852
13	1,2,4-Trimethylbenzene	95-63-6	4,078	0	4,777
14	Isobutyraldehyde	78-84-2	4,431	0	4,431
15	n-Hexane	110-54-3	4,280	0	4,280
16	Xylene (mixed isomers)	1330-20-7	3,736	5	3,880
17	Formaldehyde	50-00-0	354	0	3,326
18	Toluene	108-88-3	2,900	3	2,903
19	Butyraldehyde	123-72-8	2,507	0	2,507
20	Formic acid	64-18-6	189	0	1,968
21	Boron trifluoride	7637-07-2	1,178	0	1,178
22	o-Cresol	95-48-7	88	0	1,122
23	Dimethylamine	124-40-3	864	0	884
24	n-Butyl alcohol	71-36-3	638	0	638
25	Ethylene glycol	107-21-1	588	0	608
26	Chlorine	7782-50-5	487	0	487
27	Ethylbenzene	100-41-4	427	3	430
28	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	395	0	395
29	Zinc compounds	N982	323	0	323
30	1,3-Butadiene	106-99-0	295	0	295
31	Acrylonitrile	107-13-1	278	0	294
32	Maleic anhydride	108-31-6	132	0	281
33	Propylene oxide	75-56-9	255	0	255
34	Cyclohexane	110-82-7	232	0	232
35	Naphthalene	91-20-3	132	1	133
36	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
37	Lead And Lead Compounds	N420	8	1	70
38	Diphenylamine	122-39-4	23	0	23
39	Chromium	7440-47-3	0	2	8
40	Nickel	7440-02-0	0	2	6
41	1,2-Dibromoethane	106-93-4	4	0	4
42	Certain glycol ethers	N230	1	0	1
43	Polycyclic aromatic compounds	N590	0	0	1