Home > Analysis: 9718 Pelsey, Houston, TX 77029

📊 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

9718 PELSEY HOUSTON 77029

Building Size

1,641 sqft

Total structure area from HCAD building records.

Elevation

28.27 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: 18.27 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

Very High

Higher pollution than 92% 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)

15.47 million lbs

Extremely High

2371.3x more than typical Houston property
≈ 774 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)

2.44 million lbs

Extremely High

505.4x 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)

13.03 million lbs

Extremely 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)	15,471,146 lbs	2,437,375 lbs	13,032,270 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	2,856,144 lbs	209,358 lbs	2,052,733 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 92% of Houston homes

Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 0-9th percentile (top 10% most polluted).

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

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Ammonia, Ozone, Xylene (mixed isomers)

View the full list of 54 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (54 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	13,016,167	13,016,167
2	Hydrogen cyanide	74-90-8	1,408,014	0	1,408,014
3	Ammonia	7664-41-7	285,213	8,000	293,213
4	Ozone	10028-15-6	115,228	0	115,228
5	Xylene (mixed isomers)	1330-20-7	103,985	0	103,985
6	Toluene	108-88-3	94,346	17	94,363
7	Cyclohexane	110-82-7	80,270	0	80,270
8	n-Hexane	110-54-3	76,253	0	76,253
9	Benzene	71-43-2	60,178	10	60,188
10	Propylene	115-07-1	54,163	0	54,163
11	Hydrogen sulfide	7783-06-4	17,681	3,527	21,208
12	Ethylbenzene	100-41-4	20,678	50	20,729
13	1,2,4-Trimethylbenzene	95-63-6	17,333	0	17,333
14	Ethylene	74-85-1	16,593	0	16,593
15	Ethylene glycol	107-21-1	14,689	0	14,689
16	1,4-Dioxane	123-91-1	10,779	0	10,779
17	Carbon disulfide	75-15-0	8,557	0	8,557
18	1,3-Butadiene	106-99-0	8,274	0	8,274
19	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	6,697	0	6,697
20	Cyanide compounds	N106	5,934	45	5,979
21	Molybdenum trioxide	1313-27-5	5,795	0	5,795
22	Manganese	7439-96-5	4,728	80	4,808
23	Naphthalene	91-20-3	4,546	0	4,547
24	Phenol	108-95-2	1,635	1,804	3,439
25	Zinc compounds	N982	233	1,142	2,866
26	Polycyclic aromatic compounds	N590	2,356	1	2,365
27	Styrene	100-42-5	2,274	0	2,275
28	Cumene	98-82-8	2,256	0	2,256
29	Phthalic anhydride	85-44-9	2,000	0	2,000
30	Carbonyl sulfide	463-58-1	1,451	0	1,451
31	Nickel compounds	N495	654	489	1,143
32	Phenanthrene	85-01-8	937	0	937
33	Lead	7439-92-1	633	222	855
34	Vanadium compounds	N770	79	509	588
35	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	461	0	461
36	Certain glycol ethers	N230	402	0	402
37	Chloroacetic acid	79-11-8	330	0	330
38	Methanol	67-56-1	314	0	314
39	Methyl methacrylate	80-62-6	265	0	265
40	Cresol (mixed isomers)	1319-77-3	232	0	232
41	Mercury compounds	N458	197	1	199
42	Nickel And Nickel Compounds	N495	66	123	189
43	Cobalt compounds	N096	131	24	155
44	Lead And Lead Compounds	N420	142	7	149
45	Mercury And Mercury Compounds	N458	109	0	109
46	Lead compounds	N420	47	52	99
47	Anthracene	120-12-7	44	0	44
48	Cobalt And Cobalt Compounds	N096	42	0	42
49	Antimony compounds	N010	38	0	38
50	Nickel	7440-02-0	35	0	35
51	Nitric acid	7697-37-2	30	0	30
52	Benzo[g,h,i]perylene	191-24-2	28	0	28
53	Mercury	7439-97-6	12	0	12
54	tert-Butyl alcohol	75-65-0	7	0	7

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), 1,4-Dioxane, Ethylene glycol, Hydrogen cyanide, Ammonia

View the full list of 38 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (38 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	2,051,661	2,051,661
2	1,4-Dioxane	123-91-1	328	0	396,851
3	Ethylene glycol	107-21-1	5,094	0	177,549
4	Hydrogen cyanide	74-90-8	103,731	0	103,731
5	Ammonia	7664-41-7	28,112	1,027	29,256
6	Ozone	10028-15-6	25,701	0	25,701
7	Methanol	67-56-1	0	0	23,675
8	Xylene (mixed isomers)	1330-20-7	14,849	0	14,853
9	Cyclohexane	110-82-7	7,486	0	7,486
10	Toluene	108-88-3	6,118	4	6,132
11	Benzene	71-43-2	4,935	4	4,940
12	Propylene	115-07-1	3,529	0	3,529
13	Molybdenum trioxide	1313-27-5	1,804	0	1,804
14	1,2,4-Trimethylbenzene	95-63-6	1,449	0	1,449
15	Ethylbenzene	100-41-4	1,412	4	1,419
16	Zinc compounds	N982	22	27	1,223
17	Carbonyl sulfide	463-58-1	1,041	0	1,041
18	1,3-Butadiene	106-99-0	734	0	734
19	Ethylene	74-85-1	620	0	620
20	n-Hexane	110-54-3	607	0	607
21	Naphthalene	91-20-3	241	0	258
22	Lead	7439-92-1	243	3	250
23	Carbon disulfide	75-15-0	243	0	243
24	Cumene	98-82-8	241	0	241
25	Phenol	108-95-2	164	0	184
26	Styrene	100-42-5	159	0	159
27	Hydrogen sulfide	7783-06-4	123	0	126
28	Lead And Lead Compounds	N420	96	2	113
29	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	101	0	101
30	Polycyclic aromatic compounds	N590	38	0	56
31	Cobalt And Cobalt Compounds	N096	42	0	42
32	Phenanthrene	85-01-8	36	0	36
33	Mercury And Mercury Compounds	N458	29	0	31
34	Anthracene	120-12-7	1	0	14
35	Methyl methacrylate	80-62-6	10	0	10
36	Chloroacetic acid	79-11-8	10	0	10
37	Benzo[g,h,i]perylene	191-24-2	8	0	8
38	Cresol (mixed isomers)	1319-77-3	1	0	1