Home > Analysis: 917 Alvin 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

917 ALVIN ST PASADENA 77506

Building Size

2,523 sqft

Total structure area from HCAD building records.

Elevation

26.37 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: 16.37 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 85% 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)

2.58 million lbs

Extremely High

394.9x more than typical Houston property
≈ 129 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)

2.57 million lbs

Extremely High

532.6x 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)	2,576,644 lbs	2,568,318 lbs	633 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	76,430 lbs	65,772 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 85% 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 42 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (42 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	n-Hexane	110-54-3	664,439	170	665,022
2	Propylene	115-07-1	271,630	0	271,630
3	Methanol	67-56-1	270,255	0	270,255
4	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	250,113	0	250,113
5	Hydrogen cyanide	74-90-8	213,734	0	213,734
6	Xylene (mixed isomers)	1330-20-7	202,528	129	204,996
7	Toluene	108-88-3	136,236	43	137,145
8	Ammonia	7664-41-7	115,868	0	115,868
9	Benzene	71-43-2	86,351	44	86,950
10	Ethylene	74-85-1	78,455	0	78,455
11	Vinyl acetate	108-05-4	70,754	0	70,754
12	Ethylbenzene	100-41-4	37,971	61	38,626
13	Hydrogen sulfide	7783-06-4	37,772	0	37,773
14	1,2,4-Trimethylbenzene	95-63-6	29,199	105	29,567
15	1,3-Butadiene	106-99-0	29,071	0	29,071
16	Naphthalene	91-20-3	15,769	21	17,113
17	Cyclohexane	110-82-7	15,071	0	15,830
18	Cumene	98-82-8	7,466	10	7,659
19	Ethylene glycol	107-21-1	7,508	0	7,508
20	Dimethylamine	124-40-3	6,912	0	6,912
21	Acetaldehyde	75-07-0	6,116	0	6,116
22	Biphenyl	92-52-4	4,816	0	5,138
23	Formaldehyde	50-00-0	2,284	0	2,284
24	Acrylonitrile	107-13-1	2,224	0	2,224
25	Propylene oxide	75-56-9	1,829	0	1,829
26	Formic acid	64-18-6	1,406	0	1,406
27	Phenol	108-95-2	815	0	815
28	Diethanolamine	111-42-2	805	0	805
29	Hydrogen fluoride	7664-39-3	229	0	299
30	Chlorine	7782-50-5	268	0	268
31	Nickel	7440-02-0	120	0	120
32	Certain glycol ethers	N230	92	0	92
33	Manganese	7439-96-5	70	0	70
34	C.I. Food Red 15	81-88-9	40	0	40
35	Chromium	7440-47-3	40	0	40
36	Mercury	7439-97-6	30	0	30
37	Polycyclic aromatic compounds	N590	24	2	26
38	Lead And Lead Compounds	N420	3	22	25
39	Lead compounds	N420	1	22	22
40	Methyl tert-butyl ether	1634-04-4	2	5	10
41	Benzo[g,h,i]perylene	191-24-2	3	0	3
42	Mercury And Mercury Compounds	N458	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Ammonia, Xylene (mixed isomers), Toluene, Vinyl acetate

View the full list of 32 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (32 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	15,730	0	20,533
2	Ammonia	7664-41-7	7,948	0	8,735
3	Xylene (mixed isomers)	1330-20-7	8,389	15	8,709
4	Toluene	108-88-3	6,121	5	6,175
5	Vinyl acetate	108-05-4	5,850	0	5,852
6	n-Hexane	110-54-3	5,108	0	5,141
7	Benzene	71-43-2	4,302	4	4,399
8	1,2,4-Trimethylbenzene	95-63-6	3,062	0	3,200
9	Formaldehyde	50-00-0	255	0	2,348
10	Formic acid	64-18-6	189	0	1,968
11	Ethylbenzene	100-41-4	1,688	7	1,733
12	Propylene	115-07-1	1,119	0	1,119
13	1,3-Butadiene	106-99-0	956	0	956
14	Hydrogen sulfide	7783-06-4	923	0	923
15	Dimethylamine	124-40-3	864	0	884
16	Naphthalene	91-20-3	642	1	661
17	Ethylene glycol	107-21-1	529	0	549
18	Ethylene	74-85-1	521	0	521
19	Lead And Lead Compounds	N420	1	1	391
20	Cyclohexane	110-82-7	355	0	373
21	Acrylonitrile	107-13-1	278	0	294
22	Phenol	108-95-2	255	0	276
23	Cumene	98-82-8	262	0	263
24	Propylene oxide	75-56-9	255	0	255
25	Acetaldehyde	75-07-0	45	0	45
26	Manganese	7439-96-5	30	0	30
27	Chlorine	7782-50-5	25	0	25
28	Chromium	7440-47-3	25	0	25
29	Nickel	7440-02-0	24	0	24
30	Certain glycol ethers	N230	11	0	11
31	Diethanolamine	111-42-2	10	0	10
32	Polycyclic aromatic compounds	N590	0	0	1