📊 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

16842 MIDDLE FOREST DR HOUSTON 77059

Building Size

3,274 sqft

Total structure area from HCAD building records.

Elevation

13.32 ft

Height above sea level from USGS data.

FEMA Flood Zone

High Risk - 1% annual chance with established base flood elevation

Overall Risk

Moderate

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

Moderate

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: 3.32 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.

This property is in a high-risk flood zone. Flood insurance is required for mortgages.
Consider flood mitigation measures like elevated utilities and flood vents.
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 81% 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)

1.2 million lbs

Extremely High

183.2x more than typical Houston property
≈ 60 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)

1.2 million lbs

Extremely High

247.9x 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)

0 lbs

None

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
Typical Houston Property (2014-2024)	6,524 lbs	4,822 lbs
This Property (2014-2024)	1,195,418 lbs	1,195,418 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs
This Property (2024 Only)	242,883 lbs	69,027 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 81% 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):

Ethylene, n-Hexane, Ethylene glycol, Ethylene oxide, N,N-Dimethylformamide

View the full list of 26 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (26 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Total (lbs, 10yr)
1	Ethylene	74-85-1	325,882 lbs	325,882 lbs
2	n-Hexane	110-54-3	136,945 lbs	136,945 lbs
3	Ethylene glycol	107-21-1	104,840 lbs	104,840 lbs
4	Ethylene oxide	75-21-8	96,767 lbs	96,767 lbs
5	N,N-Dimethylformamide	68-12-2	86,451 lbs	86,451 lbs
6	Butyl acrylate	141-32-2	72,623 lbs	72,623 lbs
7	Styrene	100-42-5	69,830 lbs	69,830 lbs
8	1,3-Butadiene	106-99-0	59,009 lbs	59,009 lbs
9	Methyl methacrylate	80-62-6	57,260 lbs	57,260 lbs
10	Certain glycol ethers	N230	37,091 lbs	37,091 lbs
11	Methanol	67-56-1	31,725 lbs	31,725 lbs
12	Acetaldehyde	75-07-0	25,328 lbs	25,328 lbs
13	n-Butyl alcohol	71-36-3	20,009 lbs	20,009 lbs
14	Chlorine	7782-50-5	15,132 lbs	15,132 lbs
15	tert-Butyl alcohol	75-65-0	15,105 lbs	15,105 lbs
16	2-Methoxyethanol	109-86-4	11,669 lbs	11,669 lbs
17	Chloroethane	75-00-3	9,070 lbs	9,070 lbs
18	Toluene	108-88-3	6,900 lbs	6,900 lbs
19	2-Ethoxyethanol	110-80-5	6,044 lbs	6,044 lbs
20	Cumene	98-82-8	4,983 lbs	4,983 lbs
21	Allyl chloride	107-05-1	1,277 lbs	1,277 lbs
22	Acrylonitrile	107-13-1	775 lbs	775 lbs
23	Propylene oxide	75-56-9	624 lbs	624 lbs
24	Ethyl acrylate	140-88-5	49 lbs	49 lbs
25	Cumene hydroperoxide	80-15-9	24 lbs	24 lbs
26	4,4'-Diaminodiphenyl ether	101-80-4	6 lbs	6 lbs

Top chemicals released near this property (2024 only):

Ethylene glycol, Ethylene, Ethylene oxide, Certain glycol ethers, Chloroethane

View the full list of 23 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (23 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Total (lbs/yr)
1	Ethylene glycol	107-21-1	3,267 lbs	145,949 lbs
2	Ethylene	74-85-1	18,976 lbs	18,976 lbs
3	Ethylene oxide	75-21-8	7,535 lbs	13,382 lbs
4	Certain glycol ethers	N230	2,499 lbs	12,103 lbs
5	Chloroethane	75-00-3	3,424 lbs	9,649 lbs
6	N,N-Dimethylformamide	68-12-2	7,763 lbs	8,980 lbs
7	Methanol	67-56-1	3,702 lbs	6,614 lbs
8	Methyl methacrylate	80-62-6	6,109 lbs	6,277 lbs
9	n-Hexane	110-54-3	3,871 lbs	4,482 lbs
10	Butyl acrylate	141-32-2	3,592 lbs	3,681 lbs
11	n-Butyl alcohol	71-36-3	1,271 lbs	3,468 lbs
12	Toluene	108-88-3	279 lbs	1,851 lbs
13	Styrene	100-42-5	1,292 lbs	1,321 lbs
14	Chlorine	7782-50-5	1,293 lbs	1,293 lbs
15	1,3-Butadiene	106-99-0	1,172 lbs	1,172 lbs
16	2-Methoxyethanol	109-86-4	1,027 lbs	1,045 lbs
17	Acetaldehyde	75-07-0	375 lbs	1,034 lbs
18	tert-Butyl alcohol	75-65-0	771 lbs	771 lbs
19	2-Ethoxyethanol	110-80-5	407 lbs	429 lbs
20	Cumene	98-82-8	206 lbs	206 lbs
21	Allyl chloride	107-05-1	165 lbs	165 lbs
22	Propylene oxide	75-56-9	31 lbs	31 lbs
23	4,4'-Diaminodiphenyl ether	101-80-4	0 lbs	1 lbs