Complete Property Analysis

Environmental risk, tax analysis, and property details for 4407 Independence Pky S, La Porte, TX 77571

HCAD #0320430000023

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🌍Environmental Assessment

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.

🌊Flood Risk Analysis

FEMA Zone AE

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

4407 Independence Pky S, La Porte, TX 77571

Elevation

10.19 ft

Height above sea level from USGS data.

FEMA Flood Zone

High Risk - 1% annual chance with established base flood elevation

Overall Risk

Very High

Property flooded at 9.84ft depth.

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 High

Flood Depth

9.84 ft±0.5 ft

Depth of water above ground level.

Water Surface Elevation (WSE)

20.04 ft

Water surface elevation relative to sea level (NAVD88 datum).

Area Inundated

294.9 acres

100.0% of 500m radius flooded.

Nearest Bayou Stage

N/A

No nearby bayou within monitoring range

Depth-Damage (HCAD Valuation)

Vacant lot (no building data).

Depth-Damage (Neighborhood)

Vacant lot (no building data).

Analysis Method

COG Combined 5000 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.

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.

Special Flood Hazard Area (SFHA): Flood insurance required for federally backed mortgages

Obtain an Elevation Certificate to determine accurate flood insurance premiums

Property elevation currently above simulated flood level

Maintain flood insurance coverage as required in Special Flood Hazard Areas

Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries

Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information

🏭Industrial Pollution Exposure

21.2th percentile

Property Pollution Ranking

High

Higher pollution than 79% of Houston homes

Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.

Industrial Pollution Nearby (10 Years)

703 thousandlbs

Extremely High

107.8x more than typical Houston property

≈ 35 dump trucks of chemicals within 2 miles

Air Pollution (10 Years)

698 thousandlbs

Extremely High

144.7x more than typical Houston property

Includes fugitive emissions (leaks) and stack emissions (smokestacks).

Water Pollution (10 Years)

6 thousandlbs

Very High

Discharges to bayous, streams, and drainage systems.

Facilities Nearby

Industrial facilities within 2 miles

💡

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)	703,325 lbs	697,634 lbs	5,690 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	14,141,876 lbs	54,035 lbs	445 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 79% 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 chemicals released near this property (past 10 years):
N-Methyl-2-pyrrolidone, Methanol, Cyanide compounds, Chlorothalonil, Zinc compounds
View the full list of 108 chemicals below.

Chemicals Released (2014-2024, 10-Year Total)(108 chemicals)

#	Chemical	CAS#	Air (lbs/10yr)	Water (lbs/10yr)	Total (lbs/10yr)
1	N-Methyl-2-pyrrolidone	872-50-4	113 lbs	0 lbs	20,671,527 lbs
2	Methanol	67-56-1	11,454 lbs	308 lbs	19,270,603 lbs
3	Cyanide compounds	N106	0 lbs	0 lbs	16,901,439 lbs
4	Chlorothalonil	1897-45-6	0 lbs	0 lbs	8,991,775 lbs
5	Zinc compounds	N982	0 lbs	70 lbs	8,640,619 lbs
6	Diethanolamine	111-42-2	0 lbs	0 lbs	5,601,302 lbs
7	Certain glycol ethers	N230	36,371 lbs	0 lbs	5,107,233 lbs
8	tert-Butyl alcohol	75-65-0	16,246 lbs	1,309 lbs	3,818,104 lbs
9	Nitric acid	7697-37-2	17 lbs	0 lbs	3,486,797 lbs
10	Ethylene glycol	107-21-1	582 lbs	0 lbs	3,383,666 lbs
11	Cresol (mixed isomers)	1319-77-3	0 lbs	0 lbs	3,372,648 lbs
12	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0 lbs	0 lbs	3,070,942 lbs
13	Xylene (mixed isomers)	1330-20-7	72,123 lbs	17 lbs	2,884,889 lbs
14	Ammonia	7664-41-7	935 lbs	51 lbs	2,752,770 lbs
15	Naphthalene	91-20-3	24,189 lbs	1 lbs	1,891,706 lbs
16	Nickel compounds	N495	0 lbs	0 lbs	1,581,512 lbs
17	Toluene	108-88-3	17,535 lbs	92 lbs	1,374,607 lbs
18	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	1,236 lbs	41 lbs	1,241,589 lbs
19	Benzene	71-43-2	87,913 lbs	84 lbs	1,071,993 lbs
20	1,4-Dioxane	123-91-1	239 lbs	0 lbs	1,067,390 lbs
21	Ethylbenzene	100-41-4	12,814 lbs	4 lbs	931,048 lbs
22	Nickel	7440-02-0	106 lbs	91 lbs	830,734 lbs
23	Isobutyraldehyde	78-84-2	27,900 lbs	0 lbs	813,735 lbs
24	Formic acid	64-18-6	121 lbs	0 lbs	705,935 lbs
25	Dimethylamine	124-40-3	1,107 lbs	0 lbs	566,717 lbs
26	Maleic anhydride	108-31-6	4 lbs	0 lbs	542,229 lbs
27	n-Butyl alcohol	71-36-3	67,232 lbs	6 lbs	524,477 lbs
28	n-Hexane	110-54-3	19,925 lbs	0 lbs	501,406 lbs
29	1,2,4-Trimethylbenzene	95-63-6	132,452 lbs	2 lbs	480,264 lbs
30	Dinitrobutyl phenol	88-85-7	3 lbs	0 lbs	476,094 lbs
31	Dicyclopentadiene	77-73-6	399 lbs	0 lbs	449,596 lbs
32	Formaldehyde	50-00-0	5 lbs	0 lbs	333,384 lbs
33	1,2-Dichloroethane	107-06-2	615 lbs	0 lbs	289,538 lbs
34	Methyl tert-butyl ether	1634-04-4	45,548 lbs	263 lbs	285,514 lbs
35	Acrylic acid	79-10-7	7 lbs	0 lbs	248,410 lbs
36	Phthalic anhydride	85-44-9	2 lbs	0 lbs	248,323 lbs
37	Chromium	7440-47-3	1,812 lbs	77 lbs	230,677 lbs
38	Propionaldehyde	123-38-6	1,109 lbs	0 lbs	214,248 lbs
39	Cyclohexane	110-82-7	5,798 lbs	7 lbs	198,163 lbs
40	Sodium nitrite	7632-00-0	0 lbs	0 lbs	182,069 lbs
41	Biphenyl	92-52-4	3 lbs	0 lbs	173,908 lbs
42	Cadmium	7440-43-9	0 lbs	0 lbs	158,480 lbs
43	Lead	7439-92-1	0 lbs	1 lbs	153,285 lbs
44	Toluene diisocyanate (mixed isomers)	26471-62-5	8 lbs	0 lbs	153,072 lbs
45	Copper	7440-50-8	15 lbs	45 lbs	147,397 lbs
46	2-Methyllactonitrile	75-86-5	1 lbs	0 lbs	147,141 lbs
47	Methyl methacrylate	80-62-6	250 lbs	0 lbs	146,091 lbs
48	Epichlorohydrin	106-89-8	26 lbs	0 lbs	141,502 lbs
49	Butyl acrylate	141-32-2	0 lbs	0 lbs	139,195 lbs
50	Methyl isobutyl ketone	108-10-1	59,193 lbs	3,068 lbs	129,351 lbs
51	Aniline	62-53-3	4 lbs	0 lbs	114,014 lbs
52	Methyl parathion	298-00-0	4 lbs	0 lbs	94,285 lbs
53	Acetonitrile	75-05-8	18 lbs	0 lbs	91,519 lbs
54	Dimethyl phthalate	131-11-3	6 lbs	0 lbs	85,884 lbs
55	1,2-Dichlorobenzene	95-50-1	6 lbs	0 lbs	85,759 lbs
56	o-Xylene	95-47-6	1 lbs	0 lbs	85,181 lbs
57	Styrene	100-42-5	18,422 lbs	0 lbs	78,273 lbs
58	N,N-Dimethylformamide	68-12-2	1 lbs	0 lbs	76,335 lbs
59	Triethylamine	121-44-8	23 lbs	0 lbs	74,048 lbs
60	Dichloromethane	75-09-2	178 lbs	0 lbs	63,940 lbs
61	Chloroform	67-66-3	626 lbs	0 lbs	59,775 lbs
62	Cumene	98-82-8	14 lbs	0 lbs	58,911 lbs
63	Phenol	108-95-2	3 lbs	0 lbs	54,635 lbs
64	Cyclohexanol	108-93-0	0 lbs	0 lbs	54,237 lbs
65	Isoprene	78-79-5	67 lbs	0 lbs	44,716 lbs
66	Propylene oxide	75-56-9	672 lbs	0 lbs	39,810 lbs
67	2,4-Dichlorophenol	120-83-2	0 lbs	0 lbs	37,482 lbs
68	Hydrogen sulfide	7783-06-4	727 lbs	0 lbs	34,654 lbs
69	Vinyl acetate	108-05-4	16,160 lbs	87 lbs	30,333 lbs
70	p-Xylene	106-42-3	0 lbs	0 lbs	28,776 lbs
71	1,3-Butadiene	106-99-0	12,801 lbs	0 lbs	24,455 lbs
72	Hydrogen fluoride	7664-39-3	0 lbs	0 lbs	21,273 lbs
73	Ethylene oxide	75-21-8	1 lbs	0 lbs	20,571 lbs
74	Lead compounds	N420	25 lbs	4 lbs	18,745 lbs
75	Thiourea	62-56-6	0 lbs	0 lbs	18,707 lbs
76	Hexafluoropropylene oxide dimer acid	13252-13-6	0 lbs	0 lbs	16,482 lbs
77	m-Xylene	108-38-3	0 lbs	0 lbs	16,468 lbs
78	Allyl alcohol	107-18-6	6 lbs	0 lbs	13,310 lbs
79	Chlorine	7782-50-5	0 lbs	0 lbs	12,832 lbs
80	Metham sodium	137-42-8	0 lbs	0 lbs	11,840 lbs
81	Molybdenum trioxide	1313-27-5	0 lbs	0 lbs	10,940 lbs
82	2-Nitropropane	79-46-9	0 lbs	0 lbs	10,750 lbs
83	Vanadium compounds	N770	0 lbs	0 lbs	9,496 lbs
84	Hexafluoropropylene oxide dimer acid ammonium salt	62037-80-3	0 lbs	0 lbs	8,316 lbs
85	Selenium	7782-49-2	0 lbs	0 lbs	6,698 lbs
86	Selenium compounds	N725	0 lbs	0 lbs	5,163 lbs
87	Perfluorooctanoic acid	335-67-1	0 lbs	0 lbs	1,543 lbs
88	Ethyl acrylate	140-88-5	728 lbs	0 lbs	728 lbs
89	Propylene	115-07-1	704 lbs	0 lbs	704 lbs
90	Acetaldehyde	75-07-0	333 lbs	0 lbs	333 lbs
91	Polycyclic aromatic compounds	N590	1 lbs	0 lbs	316 lbs
92	Mercury	7439-97-6	0 lbs	0 lbs	296 lbs
93	Mercury compounds	N458	0 lbs	0 lbs	273 lbs
94	Antimony compounds	N010	235 lbs	0 lbs	235 lbs
95	Butyraldehyde	123-72-8	218 lbs	0 lbs	218 lbs
96	Toxaphene	8001-35-2	0 lbs	0 lbs	217 lbs
97	Chlordane	57-74-9	0 lbs	0 lbs	216 lbs
98	Trifluralin	1582-09-8	0 lbs	0 lbs	215 lbs
99	Heptachlor	76-44-8	0 lbs	0 lbs	215 lbs
100	Pentachlorobenzene	608-93-5	0 lbs	0 lbs	142 lbs
101	Ethylene	74-85-1	96 lbs	0 lbs	96 lbs
102	Manganese	7439-96-5	59 lbs	22 lbs	81 lbs
103	sec-Butyl alcohol	78-92-2	55 lbs	0 lbs	55 lbs
104	Hexachlorobenzene	118-74-1	0 lbs	0 lbs	50 lbs
105	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0 lbs	40 lbs	40 lbs
106	2-Methoxyethanol	109-86-4	13 lbs	0 lbs	13 lbs
107	Trichloroethylene	79-01-6	10 lbs	0 lbs	10 lbs
108	Tetrachloroethylene	127-18-4	10 lbs	0 lbs	10 lbs

📋

Top chemicals released near this property (2024 only):
Methanol, N-Methyl-2-pyrrolidone, Cyanide compounds, Diethanolamine, Nickel compounds
View the full list of 72 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only)(72 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	115 lbs	0 lbs	3,287,020 lbs
2	N-Methyl-2-pyrrolidone	872-50-4	0 lbs	0 lbs	1,988,560 lbs
3	Cyanide compounds	N106	0 lbs	0 lbs	1,464,969 lbs
4	Diethanolamine	111-42-2	0 lbs	0 lbs	1,132,847 lbs
5	Nickel compounds	N495	0 lbs	0 lbs	1,111,378 lbs
6	Zinc compounds	N982	0 lbs	0 lbs	1,056,788 lbs
7	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0 lbs	0 lbs	598,088 lbs
8	Ammonia	7664-41-7	0 lbs	1 lbs	451,172 lbs
9	Ethylene glycol	107-21-1	0 lbs	0 lbs	390,002 lbs
10	Nitric acid	7697-37-2	0 lbs	0 lbs	290,885 lbs
11	Certain glycol ethers	N230	2,726 lbs	0 lbs	251,299 lbs
12	Isobutyraldehyde	78-84-2	2,245 lbs	0 lbs	208,802 lbs
13	Toluene	108-88-3	2,189 lbs	0 lbs	195,832 lbs
14	Naphthalene	91-20-3	2,622 lbs	0 lbs	173,778 lbs
15	Xylene (mixed isomers)	1330-20-7	6,575 lbs	0 lbs	160,288 lbs
16	Benzene	71-43-2	2,068 lbs	0 lbs	111,434 lbs
17	Nickel	7440-02-0	0 lbs	20 lbs	93,439 lbs
18	1,2-Dichloroethane	107-06-2	0 lbs	0 lbs	82,523 lbs
19	n-Butyl alcohol	71-36-3	9,733 lbs	0 lbs	74,354 lbs
20	Formic acid	64-18-6	0 lbs	0 lbs	67,898 lbs
21	n-Hexane	110-54-3	3,724 lbs	0 lbs	67,430 lbs
22	Dinitrobutyl phenol	88-85-7	0 lbs	0 lbs	65,769 lbs
23	Ethylbenzene	100-41-4	1,591 lbs	0 lbs	62,440 lbs
24	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	0 lbs	0 lbs	62,222 lbs
25	tert-Butyl alcohol	75-65-0	1,168 lbs	273 lbs	59,589 lbs
26	Maleic anhydride	108-31-6	0 lbs	0 lbs	52,323 lbs
27	o-Xylene	95-47-6	0 lbs	0 lbs	50,147 lbs
28	Triethylamine	121-44-8	0 lbs	0 lbs	39,898 lbs
29	Dicyclopentadiene	77-73-6	37 lbs	0 lbs	37,215 lbs
30	Dimethylamine	124-40-3	0 lbs	0 lbs	33,746 lbs
31	Acrylic acid	79-10-7	0 lbs	0 lbs	31,093 lbs
32	1,4-Dioxane	123-91-1	0 lbs	0 lbs	28,841 lbs
33	p-Xylene	106-42-3	0 lbs	0 lbs	28,776 lbs
34	Propionaldehyde	123-38-6	0 lbs	0 lbs	27,661 lbs
35	Chromium	7440-47-3	0 lbs	32 lbs	24,635 lbs
36	1,2,4-Trimethylbenzene	95-63-6	7,218 lbs	0 lbs	24,342 lbs
37	2-Methyllactonitrile	75-86-5	0 lbs	0 lbs	22,681 lbs
38	Acetonitrile	75-05-8	0 lbs	0 lbs	22,453 lbs
39	Phthalic anhydride	85-44-9	0 lbs	0 lbs	22,047 lbs
40	Butyl acrylate	141-32-2	0 lbs	0 lbs	21,997 lbs
41	Hydrogen fluoride	7664-39-3	0 lbs	0 lbs	21,273 lbs
42	Dichloromethane	75-09-2	0 lbs	0 lbs	17,569 lbs
43	Vinyl acetate	108-05-4	3,246 lbs	0 lbs	17,332 lbs
44	m-Xylene	108-38-3	0 lbs	0 lbs	16,468 lbs
45	Methyl isobutyl ketone	108-10-1	1,559 lbs	52 lbs	15,947 lbs
46	Formaldehyde	50-00-0	0 lbs	0 lbs	14,965 lbs
47	Aniline	62-53-3	0 lbs	0 lbs	13,759 lbs
48	Dimethyl phthalate	131-11-3	0 lbs	0 lbs	7,416 lbs
49	1,2-Dichlorobenzene	95-50-1	0 lbs	0 lbs	7,230 lbs
50	Hexafluoropropylene oxide dimer acid ammonium salt	62037-80-3	0 lbs	0 lbs	5,728 lbs
51	Methyl tert-butyl ether	1634-04-4	5,649 lbs	56 lbs	5,705 lbs
52	Vanadium compounds	N770	0 lbs	0 lbs	5,467 lbs
53	Hexafluoropropylene oxide dimer acid	13252-13-6	0 lbs	0 lbs	4,402 lbs
54	Lead compounds	N420	0 lbs	0 lbs	4,131 lbs
55	Epichlorohydrin	106-89-8	0 lbs	0 lbs	2,400 lbs
56	Lead	7439-92-1	0 lbs	0 lbs	1,726 lbs
57	Cyclohexane	110-82-7	935 lbs	0 lbs	935 lbs
58	Perfluorooctanoic acid	335-67-1	0 lbs	0 lbs	634 lbs
59	1,3-Butadiene	106-99-0	433 lbs	0 lbs	433 lbs
60	Mercury compounds	N458	0 lbs	0 lbs	273 lbs
61	Mercury	7439-97-6	0 lbs	0 lbs	222 lbs
62	Toxaphene	8001-35-2	0 lbs	0 lbs	217 lbs
63	Chlordane	57-74-9	0 lbs	0 lbs	216 lbs
64	Heptachlor	76-44-8	0 lbs	0 lbs	215 lbs
65	Trifluralin	1582-09-8	0 lbs	0 lbs	215 lbs
66	Ethyl acrylate	140-88-5	117 lbs	0 lbs	117 lbs
67	Polycyclic aromatic compounds	N590	0 lbs	0 lbs	108 lbs
68	sec-Butyl alcohol	78-92-2	55 lbs	0 lbs	55 lbs
69	Styrene	100-42-5	30 lbs	0 lbs	30 lbs
70	Pentachlorobenzene	608-93-5	0 lbs	0 lbs	16 lbs
71	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0 lbs	11 lbs	11 lbs
72	Methyl methacrylate	80-62-6	1 lbs	0 lbs	1 lbs