Home > Analysis: 504 Garrett St, Pasadena, TX 77506

📊 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

504 GARRETT ST PASADENA 77506

Building Size

1,921 sqft

Total structure area from HCAD building records.

Elevation

25.76 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: 15.76 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 86% 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)

2.69 million lbs

Extremely High

412.4x more than typical Houston property
≈ 135 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)

2.68 million lbs

Extremely High

556.2x 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)

633 lbs

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)	2,690,311 lbs	2,681,984 lbs	633 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	145,037 lbs	107,969 lbs	33 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 86% 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):

n-Hexane, Propylene, Methanol, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen cyanide

View the full list of 49 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (49 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	n-Hexane	110-54-3	671,050	170	671,633
2	Propylene	115-07-1	271,630	0	271,630
3	Methanol	67-56-1	267,707	0	267,707
4	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	250,209	0	250,209
5	Hydrogen cyanide	74-90-8	213,734	0	213,734
6	Xylene (mixed isomers)	1330-20-7	210,040	129	212,508
7	Toluene	108-88-3	141,699	43	142,608
8	Ethylene	74-85-1	118,637	0	118,637
9	Ammonia	7664-41-7	115,868	0	115,868
10	Benzene	71-43-2	88,739	44	89,338
11	Vinyl acetate	108-05-4	70,754	0	70,754
12	1,2,4-Trimethylbenzene	95-63-6	44,568	105	44,936
13	Ethylbenzene	100-41-4	38,818	61	39,473
14	Hydrogen sulfide	7783-06-4	37,772	0	37,773
15	1,3-Butadiene	106-99-0	29,382	0	29,383
16	Naphthalene	91-20-3	16,265	21	17,609
17	Cyclohexane	110-82-7	15,071	0	15,830
18	Boron trifluoride	7637-07-2	14,388	0	14,388
19	Cumene	98-82-8	8,710	10	8,903
20	Dimethylamine	124-40-3	6,912	0	6,912
21	Chlorine	7782-50-5	6,651	0	6,651
22	Acetaldehyde	75-07-0	6,116	0	6,116
23	Ethylene glycol	107-21-1	5,554	0	5,554
24	Biphenyl	92-52-4	4,816	0	5,138
25	Phenol	108-95-2	5,078	0	5,078
26	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	5,066	0	5,066
27	Zinc compounds	N982	4,126	0	4,126
28	Formaldehyde	50-00-0	3,141	0	3,141
29	Acrylonitrile	107-13-1	2,224	0	2,224
30	Propylene oxide	75-56-9	1,829	0	1,829
31	o-Cresol	95-48-7	1,585	0	1,585
32	Formic acid	64-18-6	1,406	0	1,406
33	Maleic anhydride	108-31-6	1,009	0	1,009
34	Diethanolamine	111-42-2	600	0	600
35	Hydrogen fluoride	7664-39-3	229	0	299
36	Nickel	7440-02-0	120	0	120
37	Diphenylamine	122-39-4	118	0	118
38	Certain glycol ethers	N230	92	0	92
39	Manganese	7439-96-5	70	0	70
40	Styrene	100-42-5	56	0	56
41	C.I. Food Red 15	81-88-9	40	0	40
42	Chromium	7440-47-3	40	0	40
43	Mercury	7439-97-6	30	0	30
44	Polycyclic aromatic compounds	N590	24	2	26
45	Lead And Lead Compounds	N420	3	22	25
46	Lead compounds	N420	2	22	23
47	Methyl tert-butyl ether	1634-04-4	2	5	10
48	Benzo[g,h,i]perylene	191-24-2	3	0	3
49	Mercury And Mercury Compounds	N458	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Ethylene, Xylene (mixed isomers), Ammonia, n-Hexane

View the full list of 41 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (41 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	15,808	0	42,599
2	Ethylene	74-85-1	31,171	0	31,171
3	Xylene (mixed isomers)	1330-20-7	9,135	15	9,562
4	Ammonia	7664-41-7	7,948	0	8,735
5	n-Hexane	110-54-3	7,631	0	7,664
6	Toluene	108-88-3	6,779	5	6,834
7	Vinyl acetate	108-05-4	5,850	0	5,852
8	1,2,4-Trimethylbenzene	95-63-6	5,045	0	5,706
9	Benzene	71-43-2	4,587	4	4,684
10	Phenol	108-95-2	2,206	0	3,579
11	Formaldehyde	50-00-0	354	0	3,326
12	Formic acid	64-18-6	189	0	1,968
13	Ethylbenzene	100-41-4	1,757	7	1,802
14	1,3-Butadiene	106-99-0	1,251	0	1,251
15	Boron trifluoride	7637-07-2	1,178	0	1,178
16	o-Cresol	95-48-7	88	0	1,122
17	Propylene	115-07-1	1,119	0	1,119
18	Hydrogen sulfide	7783-06-4	923	0	923
19	Dimethylamine	124-40-3	864	0	884
20	Naphthalene	91-20-3	737	1	760
21	Ethylene glycol	107-21-1	530	0	550
22	Cumene	98-82-8	430	0	535
23	Chlorine	7782-50-5	512	0	512
24	Lead And Lead Compounds	N420	1	1	391
25	Cyclohexane	110-82-7	355	0	373
26	Zinc compounds	N982	323	0	323
27	Acrylonitrile	107-13-1	278	0	294
28	Maleic anhydride	108-31-6	132	0	281
29	Lead compounds	N420	0	0	269
30	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	265	0	265
31	Propylene oxide	75-56-9	255	0	255
32	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
33	Acetaldehyde	75-07-0	45	0	45
34	Manganese	7439-96-5	30	0	30
35	Chromium	7440-47-3	25	0	25
36	Nickel	7440-02-0	24	0	24
37	Diphenylamine	122-39-4	23	0	23
38	Certain glycol ethers	N230	11	0	11
39	Diethanolamine	111-42-2	10	0	10
40	Styrene	100-42-5	7	0	7
41	Polycyclic aromatic compounds	N590	0	0	1