📊 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

3022 SPARROW AVE HOUSTON 77051

Elevation

46.32 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)

Vacant lot (no building data). No structure to calculate damage for.

Depth-Damage Estimate (Neighborhood Comparison)

Vacant lot (no building data). No structure to calculate damage for.

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: 36.32 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.

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 72% 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)

289 thousand lbs

High

44.3x 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)

289 thousand lbs

Very High

59.9x 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)

367 lbs

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)	289,242 lbs	288,876 lbs	367 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	84,710 lbs	5,687 lbs	27 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 72% 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 26 chemicals below.

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

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Styrene	100-42-5	139,804 lbs	0 lbs	139,804 lbs
2	Phthalic anhydride	85-44-9	66,516 lbs	0 lbs	66,516 lbs
3	n-Butyl alcohol	71-36-3	22,867 lbs	0 lbs	22,867 lbs
4	Methyl isobutyl ketone	108-10-1	13,946 lbs	0 lbs	13,946 lbs
5	Maleic anhydride	108-31-6	13,631 lbs	0 lbs	13,631 lbs
6	Toluene	108-88-3	10,420 lbs	40 lbs	10,460 lbs
7	Xylene (mixed isomers)	1330-20-7	5,560 lbs	28 lbs	5,588 lbs
8	Methyl methacrylate	80-62-6	3,015 lbs	0 lbs	3,015 lbs
9	Chromium	7440-47-3	2,817 lbs	43 lbs	2,860 lbs
10	Ethylene glycol	107-21-1	2,513 lbs	0 lbs	2,513 lbs
11	Phenol	108-95-2	2,085 lbs	0 lbs	2,085 lbs
12	n-Hexane	110-54-3	1,770 lbs	15 lbs	1,785 lbs
13	Ethylbenzene	100-41-4	1,659 lbs	8 lbs	1,667 lbs
14	Nickel	7440-02-0	1,007 lbs	49 lbs	1,057 lbs
15	Benzene	71-43-2	615 lbs	5 lbs	620 lbs
16	1,2,4-Trimethylbenzene	95-63-6	228 lbs	11 lbs	239 lbs
17	Cobalt	7440-48-4	104 lbs	54 lbs	158 lbs
18	Copper	7440-50-8	107 lbs	45 lbs	153 lbs
19	Manganese	7439-96-5	84 lbs	61 lbs	145 lbs
20	Methanol	67-56-1	35 lbs	0 lbs	35 lbs
21	Zinc compounds	N982	30 lbs	0 lbs	30 lbs
22	Nitric acid	7697-37-2	30 lbs	0 lbs	30 lbs
23	Naphthalene	91-20-3	15 lbs	0 lbs	15 lbs
24	Vanadium compounds	N770	10 lbs	0 lbs	10 lbs
25	Lead compounds	N420	0 lbs	7 lbs	7 lbs
26	4,4'-Isopropylidenediphenol	80-05-7	6 lbs	0 lbs	6 lbs

Top chemicals released near this property (2024 only):

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

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	16 lbs	0 lbs	33,775 lbs
2	Ethylene glycol	107-21-1	7 lbs	0 lbs	32,304 lbs
3	Ethylbenzene	100-41-4	3 lbs	0 lbs	7,925 lbs
4	Styrene	100-42-5	2,610 lbs	0 lbs	4,072 lbs
5	Toluene	108-88-3	505 lbs	0 lbs	3,735 lbs
6	Phthalic anhydride	85-44-9	1,461 lbs	0 lbs	1,622 lbs
7	Methyl isobutyl ketone	108-10-1	641 lbs	0 lbs	641 lbs
8	Phenol	108-95-2	329 lbs	0 lbs	329 lbs
9	Maleic anhydride	108-31-6	31 lbs	0 lbs	192 lbs
10	Chromium	7440-47-3	30 lbs	1 lbs	32 lbs
11	Nickel	7440-02-0	24 lbs	4 lbs	28 lbs
12	Manganese	7439-96-5	8 lbs	15 lbs	23 lbs
13	Copper	7440-50-8	11 lbs	2 lbs	14 lbs
14	Cobalt	7440-48-4	8 lbs	5 lbs	14 lbs
15	4,4'-Isopropylidenediphenol	80-05-7	6 lbs	0 lbs	6 lbs