📊 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

9702 SAN CARLOS ST HOUSTON 77013

Building Size

1,250 sqft

Total structure area from HCAD building records.

Elevation

36.27 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: 26.27 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 73% 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)

356 thousand lbs

Very High

54.6x more than typical Houston property
≈ 18 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)

349 thousand lbs

Very High

72.3x 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)

7 thousand lbs

Very High

Most Houston properties have none nearby

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)	356,230 lbs	348,777 lbs	7,453 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	978,084 lbs	55,168 lbs	1,516 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 73% 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):

Ammonia, Zinc compounds, Styrene, Xylene (mixed isomers), Methanol

View the full list of 25 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (25 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Ammonia	7664-41-7	307,674 lbs	0 lbs	307,674 lbs
2	Zinc compounds	N982	26,707 lbs	6,629 lbs	33,336 lbs
3	Styrene	100-42-5	5,373 lbs	0 lbs	5,373 lbs
4	Xylene (mixed isomers)	1330-20-7	3,210 lbs	0 lbs	3,210 lbs
5	Methanol	67-56-1	2,781 lbs	0 lbs	2,781 lbs
6	Phenol	108-95-2	1,390 lbs	0 lbs	1,390 lbs
7	Ethylbenzene	100-41-4	700 lbs	0 lbs	700 lbs
8	Manganese	7439-96-5	166 lbs	334 lbs	501 lbs
9	Naphthalene	91-20-3	229 lbs	0 lbs	229 lbs
10	Manganese compounds	N450	18 lbs	208 lbs	226 lbs
11	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	141 lbs	15 lbs	156 lbs
12	1,2,4-Trimethylbenzene	95-63-6	125 lbs	0 lbs	125 lbs
13	Diisocyanates	N120	101 lbs	4 lbs	105 lbs
14	Lead compounds	N420	78 lbs	22 lbs	100 lbs
15	Aluminum oxide (fibrous forms)	1344-28-1	1 lbs	98 lbs	99 lbs
16	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	0 lbs	67 lbs	67 lbs
17	Nickel	7440-02-0	3 lbs	38 lbs	41 lbs
18	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	32 lbs	1 lbs	33 lbs
19	Lead	7439-92-1	5 lbs	21 lbs	26 lbs
20	Aluminum (fume or dust)	7429-90-5	24 lbs	0 lbs	24 lbs
21	Barium And Barium Compounds	N040	0 lbs	16 lbs	16 lbs
22	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	15 lbs	0 lbs	15 lbs
23	Lead And Lead Compounds	N420	3 lbs	1 lbs	3 lbs
24	Molybdenum trioxide	1313-27-5	1 lbs	0 lbs	1 lbs
25	Dioxin and dioxin-like compounds	N150	1 lbs	0 lbs	1 lbs

Top chemicals released near this property (2024 only):

Zinc compounds, Ammonia, Manganese, Styrene, Nickel

View the full list of 10 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (10 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Zinc compounds	N982	3,493 lbs	1,262 lbs	900,596 lbs
2	Ammonia	7664-41-7	49,429 lbs	0 lbs	52,907 lbs
3	Manganese	7439-96-5	0 lbs	41 lbs	19,987 lbs
4	Styrene	100-42-5	2,239 lbs	0 lbs	2,239 lbs
5	Nickel	7440-02-0	0 lbs	31 lbs	2,080 lbs
6	Manganese compounds	N450	2 lbs	116 lbs	118 lbs
7	Lead compounds	N420	5 lbs	3 lbs	60 lbs
8	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	0 lbs	19 lbs	53 lbs
9	Aluminum oxide (fibrous forms)	1344-28-1	0 lbs	42 lbs	42 lbs
10	Lead	7439-92-1	0 lbs	3 lbs	3 lbs