Home > Analysis: 1924 Erastus St, Houston, TX 77020 03/28/2025

📊 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

1924 ERASTUS ST HOUSTON 77020

Building Size

2,346 sqft

Total structure area from HCAD building records.

Elevation

44.56 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: 34.56 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

Moderate

Higher pollution than 74% 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)

467 thousand lbs

Very High

71.6x more than typical Houston property
≈ 23 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)

465 thousand lbs

Very High

96.4x 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)

826 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)	467,017 lbs	465,010 lbs	826 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	50,806 lbs	50,379 lbs	399 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 74% of Houston homes

Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile (top 25% most polluted).

Top chemicals released near this property (past 10 years):

Xylene (mixed isomers), n-Hexane, Styrene, n-Butyl alcohol, Toluene

View the full list of 31 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (31 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Xylene (mixed isomers)	1330-20-7	141,882	0	141,882
2	n-Hexane	110-54-3	125,640	0	125,640
3	Styrene	100-42-5	72,717	0	72,717
4	n-Butyl alcohol	71-36-3	33,617	0	33,617
5	Toluene	108-88-3	25,336	0	26,509
6	Phenol	108-95-2	23,252	0	23,252
7	Ethylbenzene	100-41-4	16,163	0	16,163
8	1,2,4-Trimethylbenzene	95-63-6	8,965	0	8,965
9	Ammonia	7664-41-7	3,770	0	3,770
10	Methyl isobutyl ketone	108-10-1	3,355	0	3,355
11	Cyclohexane	110-82-7	2,389	0	2,389
12	Formaldehyde	50-00-0	1,893	0	1,893
13	Methanol	67-56-1	1,849	0	1,849
14	Ethylene glycol	107-21-1	1,461	0	1,461
15	Methyl tert-butyl ether	1634-04-4	1,021	0	1,021
16	Propylene	115-07-1	810	0	810
17	Zinc compounds	N982	39	419	458
18	Lead	7439-92-1	174	45	219
19	Benzene	71-43-2	218	0	218
20	Manganese compounds	N450	2	208	210
21	Zinc (fume or dust)	7440-66-6	201	0	201
22	Lead compounds	N420	92	54	146
23	Aluminum oxide (fibrous forms)	1344-28-1	1	98	99
24	Copper	7440-50-8	67	0	67
25	Naphthalene	91-20-3	32	0	32
26	Polycyclic aromatic compounds	N590	26	0	26
27	Chromium	7440-47-3	16	0	20
28	Nickel	7440-02-0	20	0	20
29	Cobalt	7440-48-4	0	0	4
30	Manganese	7439-96-5	0	2	2
31	Cumene	98-82-8	1	0	1

Top chemicals released near this property (2024 only):

Xylene (mixed isomers), n-Hexane, Toluene, Styrene, 1,2,4-Trimethylbenzene

View the full list of 15 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (15 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Xylene (mixed isomers)	1330-20-7	17,453	0	17,453
2	n-Hexane	110-54-3	12,290	0	12,290
3	Toluene	108-88-3	11,886	0	11,886
4	Styrene	100-42-5	7,400	0	7,400
5	1,2,4-Trimethylbenzene	95-63-6	1,210	0	1,210
6	Zinc compounds	N982	0	239	239
7	Methanol	67-56-1	125	0	125
8	Manganese compounds	N450	2	116	118
9	Aluminum oxide (fibrous forms)	1344-28-1	0	42	42
10	Molybdenum trioxide	1313-27-5	0	0	21
11	Ethylene glycol	107-21-1	10	0	10
12	Nickel And Nickel Compounds	N495	0	0	5
13	Polycyclic aromatic compounds	N590	3	0	3
14	Vanadium (except when contained in an alloy)	7440-62-2	0	0	3
15	Lead	7439-92-1	0	2	2