📊 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

4395 PASADENA FWY PASADENA 77503

Elevation

27.57 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: 17.57 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 94% 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)

21 million lbs

Extremely High

3219.1x more than typical Houston property
≈ 1.1K 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)

13.41 million lbs

Extremely High

2780.1x 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)

7.6 million lbs

Extremely High

Most Houston properties have none nearby

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)	21,002,104 lbs	13,406,685 lbs	7,595,419 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	2,035,220 lbs	1,554,728 lbs	304,303 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 94% 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, Cumene, Propylene, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 84 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (84 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	7,254,303 lbs	7,254,303 lbs
2	Ethylene	74-85-1	3,183,373 lbs	0 lbs	3,183,373 lbs
3	Cumene	98-82-8	1,369,603 lbs	893 lbs	1,370,497 lbs
4	Propylene	115-07-1	1,276,560 lbs	0 lbs	1,276,560 lbs
5	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	1,016,311 lbs	0 lbs	1,016,311 lbs
6	1,3-Butadiene	106-99-0	1,002,696 lbs	0 lbs	1,002,696 lbs
7	n-Hexane	110-54-3	686,677 lbs	231 lbs	686,949 lbs
8	Phenol	108-95-2	646,875 lbs	1,112 lbs	647,987 lbs
9	Benzene	71-43-2	606,868 lbs	269 lbs	607,139 lbs
10	Toluene	108-88-3	561,355 lbs	748 lbs	562,148 lbs
11	Ammonia	7664-41-7	473,403 lbs	14,832 lbs	488,236 lbs
12	Methanol	67-56-1	269,554 lbs	103,463 lbs	373,017 lbs
13	Xylene (mixed isomers)	1330-20-7	305,325 lbs	212 lbs	305,546 lbs
14	Acetophenone	98-86-2	213,206 lbs	5,107 lbs	218,312 lbs
15	Hydrogen sulfide	7783-06-4	194,011 lbs	2,545 lbs	196,556 lbs
16	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	194,993 lbs	0 lbs	194,993 lbs
17	Vinyl chloride	75-01-4	166,976 lbs	14 lbs	166,990 lbs
18	Aluminum (fume or dust)	7429-90-5	132,303 lbs	0 lbs	132,313 lbs
19	Hydrogen cyanide	74-90-8	126,501 lbs	2,741 lbs	129,242 lbs
20	4,4'-Isopropylidenediphenol	80-05-7	125,700 lbs	0 lbs	125,700 lbs
21	Epichlorohydrin	106-89-8	121,011 lbs	3,811 lbs	124,822 lbs
22	Acetaldehyde	75-07-0	99,060 lbs	4,079 lbs	103,139 lbs
23	Sodium nitrite	7632-00-0	0 lbs	102,300 lbs	102,300 lbs
24	Acetonitrile	75-05-8	83,752 lbs	12,219 lbs	95,971 lbs
25	Ethylbenzene	100-41-4	80,662 lbs	244 lbs	80,908 lbs
26	Zinc compounds	N982	10,857 lbs	62,528 lbs	73,400 lbs
27	Isoprene	78-79-5	69,617 lbs	137 lbs	69,754 lbs
28	1,2,4-Trimethylbenzene	95-63-6	49,350 lbs	105 lbs	49,458 lbs
29	Cyclohexane	110-82-7	36,437 lbs	335 lbs	36,822 lbs
30	Diethanolamine	111-42-2	35,724 lbs	0 lbs	35,724 lbs
31	o-Toluidine	95-53-4	29,521 lbs	51 lbs	30,113 lbs
32	Isobutyraldehyde	78-84-2	28,404 lbs	0 lbs	28,404 lbs
33	Butyraldehyde	123-72-8	23,130 lbs	0 lbs	23,130 lbs
34	Naphthalene	91-20-3	22,439 lbs	227 lbs	22,667 lbs
35	Dichloromethane	75-09-2	19,581 lbs	39 lbs	19,620 lbs
36	Chloromethane	74-87-3	15,422 lbs	31 lbs	15,478 lbs
37	Boron trifluoride	7637-07-2	14,843 lbs	0 lbs	14,843 lbs
38	Chloroethane	75-00-3	14,708 lbs	41 lbs	14,784 lbs
39	Diaminotoluene (mixed isomers)	25376-45-8	12,695 lbs	51 lbs	12,797 lbs
40	Cumene hydroperoxide	80-15-9	11,006 lbs	0 lbs	11,006 lbs
41	Chlorine	7782-50-5	10,133 lbs	0 lbs	10,138 lbs
42	Dicyclopentadiene	77-73-6	8,670 lbs	0 lbs	8,670 lbs
43	Allyl alcohol	107-18-6	7,427 lbs	626 lbs	8,053 lbs
44	sec-Butyl alcohol	78-92-2	1,946 lbs	5,600 lbs	7,546 lbs
45	Glycidol	556-52-5	2,841 lbs	4,410 lbs	7,251 lbs
46	Aniline	62-53-3	6,824 lbs	25 lbs	7,119 lbs
47	Manganese compounds	N450	1,175 lbs	5,037 lbs	6,212 lbs
48	Methyl isobutyl ketone	108-10-1	4,714 lbs	2 lbs	4,716 lbs
49	Tetrachloroethylene	127-18-4	4,088 lbs	176 lbs	4,264 lbs
50	n-Butyl alcohol	71-36-3	4,032 lbs	0 lbs	4,032 lbs
51	Nickel compounds	N495	80 lbs	3,764 lbs	3,844 lbs
52	Styrene	100-42-5	3,800 lbs	16 lbs	3,816 lbs
53	Phthalic anhydride	85-44-9	3,545 lbs	0 lbs	3,545 lbs
54	Biphenyl	92-52-4	3,115 lbs	15 lbs	3,145 lbs
55	Ethylene glycol	107-21-1	2,220 lbs	0 lbs	2,220 lbs
56	Lead compounds	N420	800 lbs	1,415 lbs	2,216 lbs
57	o-Cresol	95-48-7	1,985 lbs	0 lbs	1,985 lbs
58	Phenanthrene	85-01-8	1,547 lbs	159 lbs	1,706 lbs
59	Maleic anhydride	108-31-6	1,686 lbs	0 lbs	1,686 lbs
60	o-Xylene	95-47-6	1,330 lbs	0 lbs	1,330 lbs
61	Formaldehyde	50-00-0	1,061 lbs	0 lbs	1,061 lbs
62	Polycyclic aromatic compounds	N590	578 lbs	132 lbs	786 lbs
63	Lead And Lead Compounds	N420	323 lbs	460 lbs	784 lbs
64	Anthracene	120-12-7	534 lbs	70 lbs	604 lbs
65	Cresol (mixed isomers)	1319-77-3	430 lbs	146 lbs	576 lbs
66	Mercury compounds	N458	105 lbs	212 lbs	317 lbs
67	Manganese And Manganese Compounds	N450	309 lbs	0 lbs	309 lbs
68	Mercury And Mercury Compounds	N458	36 lbs	195 lbs	231 lbs
69	Certain glycol ethers	N230	197 lbs	0 lbs	197 lbs
70	Benzo[g,h,i]perylene	191-24-2	96 lbs	74 lbs	170 lbs
71	1,2-Dibromoethane	106-93-4	133 lbs	0 lbs	133 lbs
72	1,2-Dichloroethane	107-06-2	127 lbs	0 lbs	127 lbs
73	Diphenylamine	122-39-4	126 lbs	0 lbs	126 lbs
74	Cobalt compounds	N096	33 lbs	89 lbs	122 lbs
75	Carbon disulfide	75-15-0	84 lbs	0 lbs	84 lbs
76	Cobalt And Cobalt Compounds	N096	12 lbs	24 lbs	36 lbs
77	Chromium	7440-47-3	0 lbs	33 lbs	33 lbs
78	Nickel	7440-02-0	0 lbs	31 lbs	31 lbs
79	Dioxin and dioxin-like compounds	N150	7 lbs	23 lbs	31 lbs
80	Lead	7439-92-1	1 lbs	13 lbs	14 lbs
81	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	11 lbs	0 lbs	11 lbs
82	Methyl tert-butyl ether	1634-04-4	2 lbs	5 lbs	10 lbs
83	Propionaldehyde	123-38-6	8 lbs	0 lbs	8 lbs
84	Acetamide	60-35-5	2 lbs	0 lbs	2 lbs

Top chemicals released near this property (2024 only):

Ethylene, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Propylene, 1,3-Butadiene, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 70 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (70 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Ethylene	74-85-1	597,252 lbs	0 lbs	597,252 lbs
2	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0 lbs	255,875 lbs	255,875 lbs
3	Propylene	115-07-1	200,727 lbs	0 lbs	200,727 lbs
4	1,3-Butadiene	106-99-0	107,945 lbs	0 lbs	107,945 lbs
5	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	97,096 lbs	0 lbs	97,096 lbs
6	4,4'-Isopropylidenediphenol	80-05-7	10,300 lbs	0 lbs	89,800 lbs
7	Cumene	98-82-8	87,713 lbs	31 lbs	87,883 lbs
8	Benzene	71-43-2	59,130 lbs	9 lbs	61,302 lbs
9	Methanol	67-56-1	12,850 lbs	22,336 lbs	57,173 lbs
10	Toluene	108-88-3	53,202 lbs	10 lbs	56,304 lbs
11	Phenol	108-95-2	44,667 lbs	254 lbs	48,437 lbs
12	Hydrogen sulfide	7783-06-4	38,523 lbs	289 lbs	38,812 lbs
13	Ammonia	7664-41-7	25,802 lbs	1,580 lbs	35,097 lbs
14	n-Hexane	110-54-3	34,330 lbs	15 lbs	34,356 lbs
15	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	24,347 lbs	0 lbs	24,347 lbs
16	Zinc compounds	N982	695 lbs	9,126 lbs	24,248 lbs
17	Xylene (mixed isomers)	1330-20-7	22,167 lbs	15 lbs	24,020 lbs
18	Acetophenone	98-86-2	17,907 lbs	860 lbs	18,767 lbs
19	Aluminum (fume or dust)	7429-90-5	13,724 lbs	0 lbs	13,724 lbs
20	Vinyl chloride	75-01-4	13,207 lbs	1 lbs	13,208 lbs
21	Hydrogen cyanide	74-90-8	13,000 lbs	70 lbs	13,070 lbs
22	Diethanolamine	111-42-2	3,059 lbs	0 lbs	12,859 lbs
23	Lead compounds	N420	93 lbs	169 lbs	12,855 lbs
24	Epichlorohydrin	106-89-8	12,291 lbs	331 lbs	12,622 lbs
25	Nickel compounds	N495	0 lbs	218 lbs	11,929 lbs
26	Dichloromethane	75-09-2	9,911 lbs	10 lbs	9,922 lbs
27	Acetaldehyde	75-07-0	8,300 lbs	380 lbs	8,680 lbs
28	Acetonitrile	75-05-8	4,900 lbs	3,100 lbs	8,000 lbs
29	Ethylbenzene	100-41-4	5,047 lbs	10 lbs	5,692 lbs
30	1,2,4-Trimethylbenzene	95-63-6	4,624 lbs	0 lbs	5,323 lbs
31	Sodium nitrite	7632-00-0	0 lbs	4,600 lbs	4,600 lbs
32	Isobutyraldehyde	78-84-2	4,431 lbs	0 lbs	4,431 lbs
33	Naphthalene	91-20-3	2,422 lbs	23 lbs	4,177 lbs
34	o-Toluidine	95-53-4	4,008 lbs	5 lbs	4,018 lbs
35	Glycidol	556-52-5	1,002 lbs	2,400 lbs	3,402 lbs
36	Cyclohexane	110-82-7	3,170 lbs	22 lbs	3,197 lbs
37	sec-Butyl alcohol	78-92-2	540 lbs	2,100 lbs	2,640 lbs
38	Butyraldehyde	123-72-8	2,507 lbs	0 lbs	2,507 lbs
39	Isoprene	78-79-5	2,360 lbs	16 lbs	2,376 lbs
40	Chloroethane	75-00-3	2,102 lbs	5 lbs	2,107 lbs
41	Chloromethane	74-87-3	1,938 lbs	5 lbs	1,943 lbs
42	Diaminotoluene (mixed isomers)	25376-45-8	1,821 lbs	5 lbs	1,831 lbs
43	Styrene	100-42-5	1,160 lbs	2 lbs	1,371 lbs
44	Boron trifluoride	7637-07-2	1,178 lbs	0 lbs	1,178 lbs
45	o-Cresol	95-48-7	88 lbs	0 lbs	1,122 lbs
46	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	1 lbs	0 lbs	1,095 lbs
47	Formaldehyde	50-00-0	99 lbs	0 lbs	978 lbs
48	n-Butyl alcohol	71-36-3	638 lbs	0 lbs	638 lbs
49	Ethylene glycol	107-21-1	559 lbs	0 lbs	559 lbs
50	Dicyclopentadiene	77-73-6	493 lbs	0 lbs	503 lbs
51	Chlorine	7782-50-5	497 lbs	0 lbs	497 lbs
52	Perfluorooctanoic acid	335-67-1	0 lbs	0 lbs	402 lbs
53	Polycyclic aromatic compounds	N590	12 lbs	14 lbs	391 lbs
54	Manganese compounds	N450	37 lbs	350 lbs	387 lbs
55	Cumene hydroperoxide	80-15-9	384 lbs	0 lbs	384 lbs
56	Benzo[g,h,i]perylene	191-24-2	0 lbs	1 lbs	334 lbs
57	Maleic anhydride	108-31-6	132 lbs	0 lbs	281 lbs
58	Tetrachloroethylene	127-18-4	270 lbs	4 lbs	274 lbs
59	Lead And Lead Compounds	N420	8 lbs	1 lbs	70 lbs
60	Mercury compounds	N458	0 lbs	53 lbs	54 lbs
61	Dioxin and dioxin-like compounds	N150	1 lbs	0 lbs	53 lbs
62	Mercury And Mercury Compounds	N458	17 lbs	0 lbs	32 lbs
63	Diphenylamine	122-39-4	23 lbs	0 lbs	23 lbs
64	Carbon disulfide	75-15-0	12 lbs	0 lbs	12 lbs
65	Chromium	7440-47-3	0 lbs	2 lbs	8 lbs
66	Phenanthrene	85-01-8	6 lbs	1 lbs	7 lbs
67	Nickel	7440-02-0	0 lbs	2 lbs	6 lbs
68	1,2-Dibromoethane	106-93-4	4 lbs	0 lbs	4 lbs
69	Anthracene	120-12-7	1 lbs	1 lbs	2 lbs
70	Certain glycol ethers	N230	1 lbs	0 lbs	1 lbs