Home > Analysis: 311 Tennessee St, 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

311 TENNESSEE ST HOUSTON 77029

Elevation

28.44 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: 18.44 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)

16.19 million lbs

Extremely High

2481.3x more than typical Houston property
≈ 809 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)

3.15 million lbs

Extremely High

654.1x 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)

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)	16,188,455 lbs	3,154,117 lbs	13,032,693 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	2,908,458 lbs	261,647 lbs	2,052,757 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, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Ammonia, Xylene (mixed isomers)

View the full list of 74 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (74 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	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	383,635	0	383,635
4	Ammonia	7664-41-7	336,948	8,000	344,948
5	Xylene (mixed isomers)	1330-20-7	159,033	0	159,033
6	n-Butyl alcohol	71-36-3	137,606	0	137,606
7	Ozone	10028-15-6	115,228	0	115,228
8	Toluene	108-88-3	94,758	17	94,775
9	n-Hexane	110-54-3	82,185	0	82,185
10	Cyclohexane	110-82-7	80,274	0	80,274
11	Benzene	71-43-2	64,553	10	64,563
12	Propylene	115-07-1	54,391	0	54,391
13	Propionaldehyde	123-38-6	31,241	0	31,241
14	Hydrogen sulfide	7783-06-4	23,987	3,527	27,514
15	Butyraldehyde	123-72-8	22,150	0	22,150
16	Ethylbenzene	100-41-4	20,678	50	20,729
17	1,2,4-Trimethylbenzene	95-63-6	17,411	0	17,555
18	Ethylene	74-85-1	16,593	0	16,593
19	Ethylene glycol	107-21-1	14,690	0	14,690
20	Dicyclopentadiene	77-73-6	14,013	0	14,013
21	1,4-Dioxane	123-91-1	10,779	0	10,779
22	Carbon disulfide	75-15-0	8,908	0	8,908
23	1,3-Butadiene	106-99-0	8,275	0	8,275
24	Cyanide compounds	N106	5,934	45	5,979
25	Molybdenum trioxide	1313-27-5	5,795	0	5,795
26	Manganese	7439-96-5	5,228	331	5,559
27	Naphthalene	91-20-3	4,546	0	4,547
28	Isobutyraldehyde	78-84-2	4,080	0	4,080
29	Phenol	108-95-2	1,635	1,804	3,439
30	Zinc compounds	N982	233	1,142	2,866
31	Polycyclic aromatic compounds	N590	2,356	1	2,365
32	Styrene	100-42-5	2,274	0	2,275
33	Cumene	98-82-8	2,256	0	2,256
34	Phthalic anhydride	85-44-9	2,000	0	2,000
35	Vinyl acetate	108-05-4	1,608	0	1,608
36	Lead	7439-92-1	1,110	383	1,493
37	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	1,460	0	1,460
38	Carbonyl sulfide	463-58-1	1,451	0	1,451
39	Methanol	67-56-1	1,187	0	1,187
40	Nickel compounds	N495	654	489	1,143
41	Acetaldehyde	75-07-0	1,011	0	1,011
42	Phenanthrene	85-01-8	937	0	937
43	Vanadium compounds	N770	144	509	653
44	1,1,1,2-Tetrachloroethane	630-20-6	434	0	434
45	Certain glycol ethers	N230	402	0	402
46	Chloroacetic acid	79-11-8	330	0	330
47	Methyl methacrylate	80-62-6	265	0	265
48	Cresol (mixed isomers)	1319-77-3	232	0	232
49	Lead And Lead Compounds	N420	204	17	222
50	Mercury compounds	N458	200	2	203
51	Nickel And Nickel Compounds	N495	66	123	189
52	Cobalt compounds	N096	131	24	155
53	Mercury And Mercury Compounds	N458	109	0	109
54	Lead compounds	N420	47	52	99
55	Dimethylamine	124-40-3	90	0	90
56	Anthracene	120-12-7	44	0	44
57	Cobalt And Cobalt Compounds	N096	42	0	42
58	Antimony compounds	N010	38	0	38
59	Nickel	7440-02-0	35	0	35
60	Allyl alcohol	107-18-6	34	0	34
61	Nitric acid	7697-37-2	30	0	30
62	Benzo[g,h,i]perylene	191-24-2	28	0	28
63	tert-Butyl alcohol	75-65-0	22	0	22
64	Methoxone sodium salt	3653-48-3	20	0	20
65	Triethylamine	121-44-8	17	0	17
66	Acrolein	107-02-8	13	0	13
67	Mercury	7439-97-6	12	0	12
68	Hydroquinone	123-31-9	9	0	9
69	Diaminotoluene (mixed isomers)	25376-45-8	4	0	4
70	Pyridine	110-86-1	3	0	3
71	Chloroethane	75-00-3	2	0	2
72	p-Cresol	106-44-5	2	0	2
73	Trichloroethylene	79-01-6	1	0	1
74	2,4-Diaminotoluene	95-80-7	1	0	1

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, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 43 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (43 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	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	50,799	0	50,799
6	Ammonia	7664-41-7	28,219	1,027	29,363
7	Ozone	10028-15-6	25,701	0	25,701
8	Methanol	67-56-1	152	0	23,827
9	Xylene (mixed isomers)	1330-20-7	14,849	0	14,853
10	Cyclohexane	110-82-7	7,486	0	7,486
11	Toluene	108-88-3	6,118	4	6,133
12	Benzene	71-43-2	4,935	4	4,940
13	Propylene	115-07-1	3,529	0	3,529
14	Molybdenum trioxide	1313-27-5	1,804	0	1,804
15	1,2,4-Trimethylbenzene	95-63-6	1,449	0	1,449
16	Ethylbenzene	100-41-4	1,412	4	1,419
17	Zinc compounds	N982	22	27	1,223
18	Carbonyl sulfide	463-58-1	1,041	0	1,041
19	1,3-Butadiene	106-99-0	734	0	734
20	Hydrogen sulfide	7783-06-4	715	0	718
21	Ethylene	74-85-1	620	0	620
22	n-Hexane	110-54-3	607	0	607
23	Carbon disulfide	75-15-0	484	0	484
24	Lead	7439-92-1	248	23	275
25	Naphthalene	91-20-3	241	0	258
26	Cumene	98-82-8	241	0	241
27	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	221	0	221
28	1,1,1,2-Tetrachloroethane	630-20-6	212	0	212
29	Phenol	108-95-2	164	0	184
30	Styrene	100-42-5	159	0	159
31	Lead And Lead Compounds	N420	128	7	150
32	Polycyclic aromatic compounds	N590	38	0	56
33	Cobalt And Cobalt Compounds	N096	42	0	42
34	Phenanthrene	85-01-8	36	0	36
35	Mercury And Mercury Compounds	N458	29	0	31
36	Dimethylamine	124-40-3	23	0	23
37	Anthracene	120-12-7	1	0	14
38	Chloroacetic acid	79-11-8	10	0	10
39	Methyl methacrylate	80-62-6	10	0	10
40	Benzo[g,h,i]perylene	191-24-2	8	0	8
41	Vinyl acetate	108-05-4	5	0	5
42	Acetaldehyde	75-07-0	1	0	1
43	Cresol (mixed isomers)	1319-77-3	1	0	1