Complete Property Analysis

Environmental risk, tax analysis, and property details for 702 Old Underwood Rd, Deer Park, TX 77536

HCAD #1288380010004

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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 X

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

702 Old Underwood Rd, Deer Park, TX 77536

Elevation

30.66 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

133.2 acres

45.2% 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.

Minimal flood hazard area - property outside mapped high-risk zones

Flood insurance available at preferred rates - over 25% of claims occur in low-risk 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

7.3th percentile

Property Pollution Ranking

Very High

Higher pollution than 93% of Houston homes

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

Industrial Pollution Nearby (10 Years)

16.37 millionlbs

Extremely High

2508.4x more than typical Houston property

≈ 818 dump trucks of chemicals within 2 miles

Air Pollution (10 Years)

9.45 millionlbs

Extremely High

1959.7x more than typical Houston property

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

Water Pollution (10 Years)

6.92 millionlbs

Extremely 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)	16,365,423 lbs	9,450,286 lbs	6,915,137 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	1,939,389 lbs	851,455 lbs	700,812 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), Ethylene, Propylene, Vinyl acetate, Methanol
View the full list of 85 chemicals below.

Chemicals Released (2014-2024, 10-Year Total)(85 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 lbs	6,391,670 lbs	6,391,670 lbs
2	Ethylene	74-85-1	3,045,289 lbs	0 lbs	3,045,289 lbs
3	Propylene	115-07-1	2,866,366 lbs	0 lbs	2,866,366 lbs
4	Vinyl acetate	108-05-4	1,056,100 lbs	5,684 lbs	1,061,784 lbs
5	Methanol	67-56-1	413,608 lbs	462,356 lbs	875,964 lbs
6	Ammonia	7664-41-7	342,314 lbs	10,775 lbs	774,569 lbs
7	n-Hexane	110-54-3	608,115 lbs	0 lbs	608,115 lbs
8	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	207,958 lbs	0 lbs	207,958 lbs
9	1,2-Dichloroethane	107-06-2	177,067 lbs	59 lbs	177,125 lbs
10	Vinyl chloride	75-01-4	80,700 lbs	33 lbs	80,733 lbs
11	1,3-Butadiene	106-99-0	69,913 lbs	45 lbs	69,958 lbs
12	Chlorine	7782-50-5	62,773 lbs	2,816 lbs	65,589 lbs
13	Certain glycol ethers	N230	64,069 lbs	0 lbs	64,069 lbs
14	Ethylene glycol	107-21-1	49,380 lbs	9,387 lbs	58,767 lbs
15	Propylene oxide	75-56-9	53,747 lbs	0 lbs	53,747 lbs
16	Xylene (mixed isomers)	1330-20-7	43,150 lbs	0 lbs	43,150 lbs
17	Methyl iodide	74-88-4	37,993 lbs	0 lbs	37,993 lbs
18	Zinc compounds	N982	6,712 lbs	28,870 lbs	35,583 lbs
19	Acetaldehyde	75-07-0	26,687 lbs	0 lbs	26,687 lbs
20	Toluene	108-88-3	24,960 lbs	40 lbs	25,000 lbs
21	Benzene	71-43-2	19,827 lbs	42 lbs	19,869 lbs
22	Butyl acrylate	141-32-2	18,363 lbs	0 lbs	18,363 lbs
23	Maleic anhydride	108-31-6	17,812 lbs	0 lbs	17,812 lbs
24	Hydrogen sulfide	7783-06-4	17,373 lbs	0 lbs	17,373 lbs
25	Formaldehyde	50-00-0	16,402 lbs	0 lbs	16,402 lbs
26	Chlorobenzene	108-90-7	16,036 lbs	0 lbs	16,036 lbs
27	Chloroethane	75-00-3	14,531 lbs	0 lbs	14,531 lbs
28	Boron trifluoride	7637-07-2	14,201 lbs	0 lbs	14,201 lbs
29	Cyclohexane	110-82-7	14,194 lbs	0 lbs	14,194 lbs
30	Chloroform	67-66-3	11,497 lbs	51 lbs	11,547 lbs
31	Trade Secret	TRD SECRT	9,705 lbs	0 lbs	9,705 lbs
32	N,N-Dimethylformamide	68-12-2	9,020 lbs	0 lbs	9,020 lbs
33	Carbon tetrachloride	56-23-5	7,770 lbs	0 lbs	7,770 lbs
34	Isoprene	78-79-5	5,909 lbs	0 lbs	5,909 lbs
35	Diisocyanates	N120	4,282 lbs	0 lbs	4,282 lbs
36	1,1,2-Trichloroethane	79-00-5	2,836 lbs	0 lbs	2,836 lbs
37	Ethylidene dichloride	75-34-3	2,180 lbs	0 lbs	2,180 lbs
38	Di(2-ethylhexyl) phthalate	117-81-7	2,020 lbs	0 lbs	2,020 lbs
39	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	0 lbs	1,936 lbs	1,936 lbs
40	1,2-Dichloroethylene	540-59-0	1,428 lbs	0 lbs	1,428 lbs
41	Nonylphenol Ethoxylates	N535	1,381 lbs	0 lbs	1,381 lbs
42	Styrene	100-42-5	1,233 lbs	0 lbs	1,233 lbs
43	Vinylidene chloride	75-35-4	693 lbs	0 lbs	693 lbs
44	Hydrogen cyanide	74-90-8	596 lbs	0 lbs	596 lbs
45	Copper compounds	N100	0 lbs	586 lbs	586 lbs
46	Naphthalene	91-20-3	493 lbs	33 lbs	526 lbs
47	Aluminum (fume or dust)	7429-90-5	462 lbs	0 lbs	462 lbs
48	Ethylbenzene	100-41-4	413 lbs	32 lbs	445 lbs
49	Copper And Copper Compounds	N100	0 lbs	351 lbs	351 lbs
50	Acrylic acid	79-10-7	348 lbs	0 lbs	348 lbs
51	Chloromethane	74-87-3	326 lbs	0 lbs	326 lbs
52	Nitric acid	7697-37-2	309 lbs	0 lbs	309 lbs
53	Tetrachloroethylene	127-18-4	294 lbs	0 lbs	294 lbs
54	Dicyclopentadiene	77-73-6	290 lbs	0 lbs	290 lbs
55	1,1,2,2-Tetrachloroethane	79-34-5	290 lbs	0 lbs	290 lbs
56	Pentachloroethane	76-01-7	245 lbs	0 lbs	245 lbs
57	Barium And Barium Compounds	N040	0 lbs	99 lbs	99 lbs
58	Lead compounds	N420	34 lbs	54 lbs	88 lbs
59	Trichloroethylene	79-01-6	84 lbs	0 lbs	84 lbs
60	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	0 lbs	81 lbs	81 lbs
61	Hexachloroethane	67-72-1	81 lbs	0 lbs	81 lbs
62	Dioxin and dioxin-like compounds	N150	0 lbs	60 lbs	61 lbs
63	Nonylphenol	N530	61 lbs	0 lbs	61 lbs
64	Diethanolamine	111-42-2	57 lbs	0 lbs	57 lbs
65	Methyl acrylate	96-33-3	47 lbs	0 lbs	47 lbs
66	Ethyl acrylate	140-88-5	35 lbs	0 lbs	35 lbs
67	Triethylamine	121-44-8	34 lbs	0 lbs	34 lbs
68	Hexachlorobenzene	118-74-1	15 lbs	14 lbs	29 lbs
69	n-Butyl alcohol	71-36-3	28 lbs	0 lbs	28 lbs
70	Manganese compounds	N450	26 lbs	0 lbs	26 lbs
71	Methyl methacrylate	80-62-6	25 lbs	0 lbs	25 lbs
72	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0 lbs	25 lbs	25 lbs
73	Diphenylamine	122-39-4	10 lbs	14 lbs	24 lbs
74	Dichloromethane	75-09-2	22 lbs	0 lbs	22 lbs
75	Lead And Lead Compounds	N420	11 lbs	10 lbs	22 lbs
76	sec-Butyl alcohol	78-92-2	21 lbs	0 lbs	21 lbs
77	1,2,4-Trimethylbenzene	95-63-6	10 lbs	0 lbs	10 lbs
78	Lead	7439-92-1	0 lbs	10 lbs	10 lbs
79	Chloroprene	126-99-8	10 lbs	0 lbs	10 lbs
80	Polycyclic aromatic compounds	N590	7 lbs	0 lbs	7 lbs
81	N-Methyl-2-pyrrolidone	872-50-4	3 lbs	0 lbs	3 lbs
82	Bis(2-chloroethyl) ether	111-44-4	2 lbs	0 lbs	2 lbs
83	Mercury compounds	N458	2 lbs	0 lbs	2 lbs
84	Benzo[g,h,i]perylene	191-24-2	0 lbs	1 lbs	1 lbs
85	Mercury And Mercury Compounds	N458	1 lbs	0 lbs	1 lbs

📋

Top chemicals released near this property (2024 only):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia, Ethylene, Propylene, Methanol
View the full list of 63 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only)(63 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 lbs	629,081 lbs	629,081 lbs
2	Ammonia	7664-41-7	49,914 lbs	503 lbs	437,538 lbs
3	Ethylene	74-85-1	300,945 lbs	0 lbs	300,945 lbs
4	Propylene	115-07-1	260,344 lbs	0 lbs	260,344 lbs
5	Methanol	67-56-1	30,477 lbs	69,184 lbs	99,661 lbs
6	Vinyl acetate	108-05-4	81,700 lbs	410 lbs	82,110 lbs
7	n-Hexane	110-54-3	65,408 lbs	0 lbs	65,408 lbs
8	1,2-Dichloroethane	107-06-2	12,354 lbs	15 lbs	12,369 lbs
9	Trade Secret	TRD SECRT	5,677 lbs	0 lbs	5,677 lbs
10	Chlorine	7782-50-5	5,622 lbs	0 lbs	5,622 lbs
11	Vinyl chloride	75-01-4	4,880 lbs	2 lbs	4,881 lbs
12	1,3-Butadiene	106-99-0	3,951 lbs	9 lbs	3,960 lbs
13	Formaldehyde	50-00-0	3,363 lbs	0 lbs	3,363 lbs
14	Certain glycol ethers	N230	3,026 lbs	0 lbs	3,026 lbs
15	Maleic anhydride	108-31-6	2,270 lbs	0 lbs	2,270 lbs
16	Toluene	108-88-3	2,074 lbs	6 lbs	2,080 lbs
17	Diisocyanates	N120	1,843 lbs	0 lbs	1,843 lbs
18	Zinc compounds	N982	426 lbs	1,345 lbs	1,771 lbs
19	Benzene	71-43-2	1,725 lbs	3 lbs	1,728 lbs
20	Cyclohexane	110-82-7	1,726 lbs	0 lbs	1,726 lbs
21	Ethylene glycol	107-21-1	1,648 lbs	0 lbs	1,648 lbs
22	Methyl iodide	74-88-4	1,600 lbs	0 lbs	1,600 lbs
23	Chloroethane	75-00-3	1,506 lbs	0 lbs	1,506 lbs
24	Boron trifluoride	7637-07-2	1,192 lbs	0 lbs	1,192 lbs
25	Xylene (mixed isomers)	1330-20-7	1,144 lbs	0 lbs	1,144 lbs
26	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	1,072 lbs	0 lbs	1,072 lbs
27	Chloroform	67-66-3	798 lbs	9 lbs	807 lbs
28	Butyl acrylate	141-32-2	597 lbs	0 lbs	597 lbs
29	Acetaldehyde	75-07-0	585 lbs	0 lbs	585 lbs
30	Isoprene	78-79-5	578 lbs	0 lbs	578 lbs
31	Carbon tetrachloride	56-23-5	572 lbs	0 lbs	572 lbs
32	N,N-Dimethylformamide	68-12-2	570 lbs	0 lbs	570 lbs
33	Ethylbenzene	100-41-4	360 lbs	2 lbs	362 lbs
34	Naphthalene	91-20-3	270 lbs	18 lbs	288 lbs
35	Hydrogen sulfide	7783-06-4	235 lbs	0 lbs	235 lbs
36	1,1,2-Trichloroethane	79-00-5	227 lbs	0 lbs	227 lbs
37	Copper And Copper Compounds	N100	0 lbs	209 lbs	209 lbs
38	Ethylidene dichloride	75-34-3	156 lbs	0 lbs	156 lbs
39	Styrene	100-42-5	143 lbs	0 lbs	143 lbs
40	Acrylic acid	79-10-7	127 lbs	0 lbs	127 lbs
41	1,2-Dichloroethylene	540-59-0	103 lbs	0 lbs	103 lbs
42	Vinylidene chloride	75-35-4	49 lbs	0 lbs	49 lbs
43	Nitric acid	7697-37-2	31 lbs	0 lbs	31 lbs
44	Dicyclopentadiene	77-73-6	30 lbs	0 lbs	30 lbs
45	Aluminum (fume or dust)	7429-90-5	26 lbs	0 lbs	26 lbs
46	Tetrachloroethylene	127-18-4	24 lbs	0 lbs	24 lbs
47	1,1,2,2-Tetrachloroethane	79-34-5	24 lbs	0 lbs	24 lbs
48	Pentachloroethane	76-01-7	20 lbs	0 lbs	20 lbs
49	Trichloroethylene	79-01-6	8 lbs	0 lbs	8 lbs
50	n-Butyl alcohol	71-36-3	7 lbs	0 lbs	7 lbs
51	Dioxin and dioxin-like compounds	N150	0 lbs	7 lbs	7 lbs
52	Hexachloroethane	67-72-1	7 lbs	0 lbs	7 lbs
53	Ethyl acrylate	140-88-5	6 lbs	0 lbs	6 lbs
54	Lead	7439-92-1	0 lbs	5 lbs	5 lbs
55	sec-Butyl alcohol	78-92-2	5 lbs	0 lbs	5 lbs
56	Lead And Lead Compounds	N420	0 lbs	4 lbs	4 lbs
57	Polycyclic aromatic compounds	N590	3 lbs	0 lbs	3 lbs
58	Hexachlorobenzene	118-74-1	1 lbs	1 lbs	2 lbs
59	Nonylphenol	N530	2 lbs	0 lbs	2 lbs
60	Dichloromethane	75-09-2	2 lbs	0 lbs	2 lbs
61	Propylene oxide	75-56-9	1 lbs	0 lbs	1 lbs
62	Mercury And Mercury Compounds	N458	1 lbs	0 lbs	1 lbs
63	Chloroprene	126-99-8	1 lbs	0 lbs	1 lbs