Home > Analysis: 2504 4th St, Galena Park, TX 77547 05/15/2025

📊 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

2504 4TH ST GALENA PARK 77547

Building Size

2,102 sqft

Total structure area from HCAD building records.

Elevation

31.79 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: 21.79 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 93% 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)

20.47 million lbs

Extremely High

3137.6x more than typical Houston property
≈ 1.0K 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)

7.43 million lbs

Extremely High

1541.3x 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)

13.04 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)	20,470,636 lbs	7,432,736 lbs	13,035,912 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	3,361,364 lbs	599,311 lbs	2,052,962 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 93% 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, Propylene, n-Hexane

View the full list of 75 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (75 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	2,226,566	0	2,226,566
3	Ammonia	7664-41-7	1,017,825	8,000	1,025,825
4	Propylene	115-07-1	991,303	0	991,303
5	n-Hexane	110-54-3	514,288	0	514,295
6	Xylene (mixed isomers)	1330-20-7	402,309	627	402,966
7	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
8	Ethylene	74-85-1	308,912	0	308,912
9	Benzene	71-43-2	278,376	467	278,854
10	Toluene	108-88-3	269,788	261	270,073
11	Hydrogen sulfide	7783-06-4	230,430	3,527	233,957
12	n-Butyl alcohol	71-36-3	137,606	0	137,606
13	Cyclohexane	110-82-7	132,775	0	132,784
14	Ozone	10028-15-6	115,228	0	115,228
15	Diethanolamine	111-42-2	101,560	0	101,560
16	Methanol	67-56-1	64,581	0	64,581
17	Ethylbenzene	100-41-4	47,979	113	48,101
18	Propionaldehyde	123-38-6	31,241	0	31,241
19	1,3-Butadiene	106-99-0	29,889	0	29,889
20	Butyraldehyde	123-72-8	22,150	0	22,150
21	1,2,4-Trimethylbenzene	95-63-6	20,469	0	20,627
22	Ethylene glycol	107-21-1	14,690	0	14,699
23	Dicyclopentadiene	77-73-6	14,013	0	14,013
24	1,4-Dioxane	123-91-1	10,779	0	10,779
25	Naphthalene	91-20-3	9,229	75	9,313
26	Carbon disulfide	75-15-0	8,908	0	8,908
27	Cyanide compounds	N106	5,934	45	5,979
28	Polycyclic aromatic compounds	N590	5,221	526	5,956
29	Molybdenum trioxide	1313-27-5	5,795	0	5,795
30	Manganese	7439-96-5	5,228	331	5,559
31	Phenol	108-95-2	1,635	2,959	4,594
32	Isobutyraldehyde	78-84-2	4,080	0	4,080
33	Cumene	98-82-8	3,828	0	3,830
34	Styrene	100-42-5	3,537	0	3,538
35	Zinc compounds	N982	233	1,207	2,931
36	Phthalic anhydride	85-44-9	2,000	0	2,000
37	Vinyl acetate	108-05-4	1,608	0	1,608
38	Lead	7439-92-1	1,110	383	1,493
39	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
40	Carbonyl sulfide	463-58-1	1,451	0	1,451
41	Nickel compounds	N495	654	489	1,143
42	Acetaldehyde	75-07-0	1,011	0	1,011
43	Phenanthrene	85-01-8	937	0	937
44	Vanadium compounds	N770	144	509	653
45	1,1,1,2-Tetrachloroethane	630-20-6	434	0	434
46	Biphenyl	92-52-4	345	0	364
47	Cresol (mixed isomers)	1319-77-3	232	0	232
48	Lead And Lead Compounds	N420	204	17	222
49	Mercury compounds	N458	200	2	203
50	Nickel And Nickel Compounds	N495	66	123	189
51	Cobalt compounds	N096	131	24	155
52	Mercury And Mercury Compounds	N458	109	0	109
53	Lead compounds	N420	47	52	99
54	Dimethylamine	124-40-3	90	0	90
55	Mercury	7439-97-6	89	0	89
56	Isoprene	78-79-5	60	0	60
57	Anthracene	120-12-7	44	0	44
58	Cobalt And Cobalt Compounds	N096	42	0	42
59	Antimony compounds	N010	38	0	38
60	Benzo[g,h,i]perylene	191-24-2	28	7	36
61	Nickel	7440-02-0	35	0	35
62	Allyl alcohol	107-18-6	34	0	34
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	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	11	0	11
68	Hydroquinone	123-31-9	9	0	9
69	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	8	0	8
70	Diaminotoluene (mixed isomers)	25376-45-8	4	0	4
71	Pyridine	110-86-1	3	0	3
72	Chloroethane	75-00-3	2	0	2
73	p-Cresol	106-44-5	2	0	2
74	Trichloroethylene	79-01-6	1	0	1
75	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, Ammonia

View the full list of 49 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (49 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	184,568
4	Hydrogen cyanide	74-90-8	177,459	0	177,459
5	Ammonia	7664-41-7	108,983	1,027	118,401
6	Diethanolamine	111-42-2	10,082	0	85,611
7	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
8	Xylene (mixed isomers)	1330-20-7	44,333	10	44,361
9	n-Hexane	110-54-3	38,647	0	38,647
10	Propylene	115-07-1	36,754	0	36,754
11	Ozone	10028-15-6	25,701	0	25,701
12	Methanol	67-56-1	152	0	23,827
13	Toluene	108-88-3	23,403	8	23,474
14	Benzene	71-43-2	21,364	114	21,957
15	Zinc compounds	N982	22	32	19,978
16	Ethylene	74-85-1	17,345	0	17,345
17	Hydrogen sulfide	7783-06-4	14,137	0	14,140
18	Cyclohexane	110-82-7	11,534	0	11,534
19	Ethylbenzene	100-41-4	4,069	5	4,084
20	Phenol	108-95-2	164	8	3,009
21	Molybdenum trioxide	1313-27-5	1,804	0	1,804
22	1,2,4-Trimethylbenzene	95-63-6	1,671	0	1,671
23	Certain glycol ethers	N230	0	0	1,111
24	Naphthalene	91-20-3	995	7	1,076
25	Carbonyl sulfide	463-58-1	1,041	0	1,041
26	Nickel And Nickel Compounds	N495	0	0	915
27	1,3-Butadiene	106-99-0	762	0	762
28	Cumene	98-82-8	525	0	525
29	Carbon disulfide	75-15-0	484	0	484
30	Polycyclic aromatic compounds	N590	392	55	465
31	Lead	7439-92-1	248	23	283
32	Styrene	100-42-5	262	0	262
33	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	221	0	221
34	1,1,1,2-Tetrachloroethane	630-20-6	212	0	212
35	Lead And Lead Compounds	N420	128	7	150
36	Cobalt And Cobalt Compounds	N096	42	0	42
37	Phenanthrene	85-01-8	36	0	36
38	Biphenyl	92-52-4	33	0	33
39	Mercury And Mercury Compounds	N458	29	0	31
40	Dimethylamine	124-40-3	23	0	23
41	Anthracene	120-12-7	1	0	14
42	Benzo[g,h,i]perylene	191-24-2	8	5	13
43	Isoprene	78-79-5	8	0	8
44	Mercury	7439-97-6	7	0	7
45	Vinyl acetate	108-05-4	5	0	5
46	Vanadium (except when contained in an alloy)	7440-62-2	0	0	3
47	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	2	0	3
48	Acetaldehyde	75-07-0	1	0	1
49	Cresol (mixed isomers)	1319-77-3	1	0	1