Home > Analysis: 8523 Hearth Dr #35, Houston, TX 77054 02/27/2025

📊 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

8523 HEARTH DR 35 HOUSTON 77054

Building Size

1,454 sqft

Total structure area from HCAD building records.

Elevation

47.99 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: 37.99 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 71% 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)

285 thousand lbs

High

43.7x more than typical Houston property
≈ 14 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)

285 thousand lbs

Very High

59.1x 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)

114 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)	285,029 lbs	284,915 lbs	114 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	84,621 lbs	5,629 lbs	0 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 71% 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):

Styrene, Phthalic anhydride, n-Butyl alcohol, Methyl isobutyl ketone, Maleic anhydride

View the full list of 22 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (22 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Styrene	100-42-5	139,804	0	139,804
2	Phthalic anhydride	85-44-9	66,516	0	66,516
3	n-Butyl alcohol	71-36-3	22,867	0	22,867
4	Methyl isobutyl ketone	108-10-1	13,946	0	13,946
5	Maleic anhydride	108-31-6	13,631	0	13,631
6	Toluene	108-88-3	10,420	40	10,460
7	Xylene (mixed isomers)	1330-20-7	5,560	28	5,588
8	Methyl methacrylate	80-62-6	3,015	0	3,015
9	Ethylene glycol	107-21-1	2,513	0	2,513
10	Phenol	108-95-2	2,085	0	2,085
11	n-Hexane	110-54-3	1,770	15	1,785
12	Ethylbenzene	100-41-4	1,659	8	1,667
13	Benzene	71-43-2	615	5	620
14	1,2,4-Trimethylbenzene	95-63-6	228	11	239
15	Formic acid	64-18-6	160	0	160
16	Methanol	67-56-1	35	0	35
17	Zinc compounds	N982	30	0	30
18	Nitric acid	7697-37-2	30	0	30
19	Naphthalene	91-20-3	15	0	15
20	Vanadium compounds	N770	10	0	10
21	Lead compounds	N420	0	7	7
22	4,4'-Isopropylidenediphenol	80-05-7	6	0	6

Top chemicals released near this property (2024 only):

Xylene (mixed isomers), Ethylene glycol, Ethylbenzene, Styrene, Toluene

View the full list of 11 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (11 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Total (lbs/yr)
1	Xylene (mixed isomers)	1330-20-7	16	33,775
2	Ethylene glycol	107-21-1	7	32,304
3	Ethylbenzene	100-41-4	3	7,925
4	Styrene	100-42-5	2,610	4,072
5	Toluene	108-88-3	505	3,735
6	Phthalic anhydride	85-44-9	1,461	1,622
7	Methyl isobutyl ketone	108-10-1	641	641
8	Phenol	108-95-2	329	329
9	Maleic anhydride	108-31-6	31	192
10	Formic acid	64-18-6	23	23
11	4,4'-Isopropylidenediphenol	80-05-7	6	6