Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 4020 Flowserve Way, Pasadena, TX 77503

HCAD #1401630010001
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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
4020 Flowserve Way, Pasadena, TX 77503
Elevation
31.75 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
Moderate
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
Moderate
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
138.8 acres
47.1% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$0
Vacant lot (no building data).
Depth-Damage (Neighborhood)
$0
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.

Property Would Be Safe
Safety Margin: 0 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.

#1
Special Flood Hazard Area (SFHA): Flood insurance required for federally backed mortgages
#2
Obtain an Elevation Certificate to determine accurate flood insurance premiums
#3
Property elevation currently above simulated flood level
#4
Maintain flood insurance coverage as required in Special Flood Hazard Areas
#5
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#6
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
6.5th percentile
Property Pollution Ranking
Very High
Higher pollution than 94% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
18.41 millionlbs
Extremely High
2821.9x more than typical Houston property
≈ 921 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
10.82 millionlbs
Extremely High
2244.4x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
7.59 millionlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
12
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.

PeriodTotalAirWater
Typical Houston Property (2014-2024)6,524 lbs4,822 lbs0 lbs
This Property (2014-2024)18,410,578 lbs10,823,379 lbs7,587,199 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,656,010 lbs1,352,224 lbs303,782 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
6%
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 72 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(72 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs7,254,303 lbs7,254,303 lbs
2Ethylene74-85-11,666,254 lbs0 lbs1,666,254 lbs
3Cumene98-82-81,368,814 lbs883 lbs1,369,697 lbs
4Propylene115-07-11,276,381 lbs0 lbs1,276,381 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-91,016,311 lbs0 lbs1,016,311 lbs
61,3-Butadiene106-99-01,002,570 lbs0 lbs1,002,570 lbs
7Phenol108-95-2646,790 lbs1,112 lbs647,902 lbs
8Benzene71-43-2594,774 lbs245 lbs595,019 lbs
9Toluene108-88-3489,310 lbs191 lbs489,501 lbs
10Ammonia7664-41-7469,639 lbs14,832 lbs484,471 lbs
11Methanol67-56-1268,999 lbs103,463 lbs372,462 lbs
12Xylene (mixed isomers)1330-20-7258,233 lbs179 lbs258,412 lbs
13Acetophenone98-86-2213,206 lbs5,107 lbs218,312 lbs
14Hydrogen sulfide7783-06-4194,010 lbs2,545 lbs196,555 lbs
15n-Hexane110-54-3184,978 lbs10 lbs184,988 lbs
16Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
17Hydrogen cyanide74-90-8126,501 lbs2,741 lbs129,242 lbs
184,4'-Isopropylidenediphenol80-05-7125,700 lbs0 lbs125,700 lbs
19Epichlorohydrin106-89-8121,011 lbs3,811 lbs124,822 lbs
20Acetaldehyde75-07-099,060 lbs4,079 lbs103,139 lbs
21Sodium nitrite7632-00-00 lbs102,300 lbs102,300 lbs
22Acetonitrile75-05-883,752 lbs12,219 lbs95,971 lbs
23Ethylbenzene100-41-473,430 lbs222 lbs73,652 lbs
24Isoprene78-79-569,617 lbs137 lbs69,754 lbs
25Zinc compoundsN9824,579 lbs55,662 lbs60,241 lbs
26Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-051,622 lbs0 lbs51,622 lbs
27Diethanolamine111-42-235,724 lbs0 lbs35,724 lbs
28Isobutyraldehyde78-84-228,404 lbs0 lbs28,404 lbs
291,2,4-Trimethylbenzene95-63-623,624 lbs0 lbs23,624 lbs
30Butyraldehyde123-72-823,130 lbs0 lbs23,130 lbs
31Naphthalene91-20-321,844 lbs206 lbs22,050 lbs
32Dichloromethane75-09-219,581 lbs39 lbs19,620 lbs
33Boron trifluoride7637-07-214,388 lbs0 lbs14,388 lbs
34Cyclohexane110-82-713,331 lbs284 lbs13,615 lbs
35Cumene hydroperoxide80-15-911,006 lbs0 lbs11,006 lbs
36Dicyclopentadiene77-73-68,670 lbs0 lbs8,670 lbs
37Allyl alcohol107-18-67,427 lbs626 lbs8,053 lbs
38sec-Butyl alcohol78-92-21,946 lbs5,600 lbs7,546 lbs
39Glycidol556-52-52,841 lbs4,410 lbs7,251 lbs
40Chlorine7782-50-56,383 lbs0 lbs6,383 lbs
41Manganese compoundsN450111 lbs5,037 lbs5,148 lbs
42Methyl isobutyl ketone108-10-14,714 lbs2 lbs4,716 lbs
43Tetrachloroethylene127-18-44,088 lbs176 lbs4,264 lbs
44n-Butyl alcohol71-36-34,032 lbs0 lbs4,032 lbs
45Nickel compoundsN49580 lbs3,764 lbs3,844 lbs
46Styrene100-42-53,800 lbs16 lbs3,816 lbs
47Phthalic anhydride85-44-93,545 lbs0 lbs3,545 lbs
48Ethylene glycol107-21-12,220 lbs0 lbs2,220 lbs
49Lead compoundsN420509 lbs1,376 lbs1,886 lbs
50Phenanthrene85-01-81,547 lbs159 lbs1,706 lbs
51Maleic anhydride108-31-61,649 lbs0 lbs1,649 lbs
52o-Cresol95-48-71,585 lbs0 lbs1,585 lbs
53o-Xylene95-47-61,330 lbs0 lbs1,330 lbs
54Formaldehyde50-00-0857 lbs0 lbs857 lbs
55Polycyclic aromatic compoundsN590576 lbs130 lbs782 lbs
56Lead And Lead CompoundsN420267 lbs421 lbs689 lbs
57Anthracene120-12-7534 lbs70 lbs604 lbs
58Cresol (mixed isomers)1319-77-3430 lbs146 lbs576 lbs
59Mercury compoundsN458105 lbs212 lbs317 lbs
60Mercury And Mercury CompoundsN45836 lbs195 lbs230 lbs
61Certain glycol ethersN230185 lbs0 lbs185 lbs
62Benzo[g,h,i]perylene191-24-296 lbs74 lbs170 lbs
63Cobalt compoundsN09633 lbs89 lbs122 lbs
64Diphenylamine122-39-4118 lbs0 lbs118 lbs
65Carbon disulfide75-15-084 lbs0 lbs84 lbs
66Cobalt And Cobalt CompoundsN09612 lbs24 lbs36 lbs
67Chromium7440-47-30 lbs33 lbs33 lbs
68Nickel7440-02-00 lbs31 lbs31 lbs
69Dioxin and dioxin-like compoundsN1507 lbs23 lbs31 lbs
70Propionaldehyde123-38-68 lbs0 lbs8 lbs
71Piperonyl butoxide51-03-64 lbs0 lbs4 lbs
72Acetamide60-35-52 lbs0 lbs2 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 60 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(60 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene74-85-1469,459 lbs0 lbs469,459 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs255,875 lbs255,875 lbs
3Propylene115-07-1200,727 lbs0 lbs200,727 lbs
41,3-Butadiene106-99-0107,945 lbs0 lbs107,945 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-997,096 lbs0 lbs97,096 lbs
6Cumene98-82-887,663 lbs31 lbs87,694 lbs
7Benzene71-43-258,000 lbs7 lbs58,007 lbs
8Toluene108-88-350,100 lbs7 lbs50,107 lbs
9Phenol108-95-244,667 lbs254 lbs44,921 lbs
10Hydrogen sulfide7783-06-438,523 lbs289 lbs38,812 lbs
11Methanol67-56-112,850 lbs22,336 lbs35,186 lbs
12Ammonia7664-41-725,802 lbs1,580 lbs27,382 lbs
13Xylene (mixed isomers)1330-20-718,785 lbs10 lbs18,795 lbs
14Acetophenone98-86-217,907 lbs860 lbs18,767 lbs
15n-Hexane110-54-315,830 lbs10 lbs15,840 lbs
16Vinyl chloride75-01-413,207 lbs1 lbs13,208 lbs
17Hydrogen cyanide74-90-813,000 lbs70 lbs13,070 lbs
18Epichlorohydrin106-89-812,291 lbs331 lbs12,622 lbs
194,4'-Isopropylidenediphenol80-05-710,300 lbs0 lbs10,300 lbs
20Dichloromethane75-09-29,911 lbs10 lbs9,921 lbs
21Zinc compoundsN982340 lbs8,650 lbs8,990 lbs
22Acetaldehyde75-07-08,300 lbs380 lbs8,680 lbs
23Acetonitrile75-05-84,900 lbs3,100 lbs8,000 lbs
24Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-04,735 lbs0 lbs4,735 lbs
25Ethylbenzene100-41-44,620 lbs7 lbs4,627 lbs
26Sodium nitrite7632-00-00 lbs4,600 lbs4,600 lbs
27Isobutyraldehyde78-84-24,431 lbs0 lbs4,431 lbs
28Glycidol556-52-51,002 lbs2,400 lbs3,402 lbs
29Diethanolamine111-42-23,059 lbs0 lbs3,059 lbs
30sec-Butyl alcohol78-92-2540 lbs2,100 lbs2,640 lbs
31Butyraldehyde123-72-82,507 lbs0 lbs2,507 lbs
321,2,4-Trimethylbenzene95-63-62,446 lbs0 lbs2,446 lbs
33Naphthalene91-20-32,376 lbs22 lbs2,398 lbs
34Isoprene78-79-52,360 lbs16 lbs2,376 lbs
35Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
36Styrene100-42-51,160 lbs2 lbs1,162 lbs
37Cyclohexane110-82-7858 lbs17 lbs875 lbs
38n-Butyl alcohol71-36-3638 lbs0 lbs638 lbs
39Ethylene glycol107-21-1559 lbs0 lbs559 lbs
40Dicyclopentadiene77-73-6493 lbs0 lbs493 lbs
41Chlorine7782-50-5487 lbs0 lbs487 lbs
42Manganese compoundsN45037 lbs350 lbs387 lbs
43Cumene hydroperoxide80-15-9384 lbs0 lbs384 lbs
44Tetrachloroethylene127-18-4270 lbs4 lbs274 lbs
45Lead compoundsN42093 lbs169 lbs262 lbs
46Nickel compoundsN4950 lbs218 lbs218 lbs
47Maleic anhydride108-31-6132 lbs0 lbs132 lbs
48Formaldehyde50-00-099 lbs0 lbs99 lbs
49o-Cresol95-48-788 lbs0 lbs88 lbs
50Mercury compoundsN4580 lbs53 lbs53 lbs
51Polycyclic aromatic compoundsN59012 lbs14 lbs31 lbs
52Diphenylamine122-39-423 lbs0 lbs23 lbs
53Mercury And Mercury CompoundsN45817 lbs0 lbs17 lbs
54Carbon disulfide75-15-012 lbs0 lbs12 lbs
55Phenanthrene85-01-86 lbs1 lbs7 lbs
56Nickel7440-02-00 lbs2 lbs2 lbs
57Chromium7440-47-30 lbs2 lbs2 lbs
58Anthracene120-12-71 lbs1 lbs2 lbs
59Benzo[g,h,i]perylene191-24-20 lbs1 lbs2 lbs
60Dioxin and dioxin-like compoundsN1501 lbs0 lbs1 lbs
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