Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 517 Spooner St, Pasadena, TX 77506

HCAD #0282500030013
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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
517 Spooner St, Pasadena, TX 77506
Building Size
1,380sqft
Total structure area from HCAD building records.
Elevation
25.1 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
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)
34.94 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
293.6 acres
99.5% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$51,701
Based on HCAD building value of $79,541.
Depth-Damage (Neighborhood)
$51,137
Based on neighborhood replacement cost.
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 Flooded
Flood Depth: 9.84 feet
Severity
Severe
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
Minimal flood hazard area - property outside mapped high-risk zones
#2
Flood insurance available at preferred rates - over 25% of claims occur in low-risk areas
#3
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#4
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
11.6th percentile
Property Pollution Ranking
High
Higher pollution than 88% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
5.12 millionlbs
Extremely High
784.3x more than typical Houston property
≈ 256 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
5.11 millionlbs
Extremely High
1060.5x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
3 thousandlbs
Very High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
10
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)5,116,781 lbs5,113,968 lbs2,813 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)284,144 lbs283,589 lbs71 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 88% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 10-19th percentile.
📋
Top chemicals released near this property (past 10 years):
Hydrogen cyanide, n-Hexane, Propylene, Xylene (mixed isomers), Toluene
View the full list of 43 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(43 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Hydrogen cyanide74-90-81,032,286 lbs0 lbs1,032,286 lbs
2n-Hexane110-54-31,031,342 lbs170 lbs1,031,932 lbs
3Propylene115-07-1465,601 lbs0 lbs465,601 lbs
4Xylene (mixed isomers)1330-20-7431,507 lbs756 lbs434,632 lbs
5Toluene108-88-3304,674 lbs218 lbs305,782 lbs
6Benzene71-43-2275,081 lbs138 lbs275,785 lbs
7Methanol67-56-1269,438 lbs0 lbs269,438 lbs
8Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9250,113 lbs0 lbs250,113 lbs
9Hydrogen sulfide7783-06-4244,215 lbs0 lbs244,216 lbs
10Ethylene74-85-1206,072 lbs0 lbs206,072 lbs
11Ammonia7664-41-7151,468 lbs0 lbs151,468 lbs
12Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
13Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
14Cyclohexane110-82-767,572 lbs0 lbs68,340 lbs
15Ethylbenzene100-41-465,915 lbs65 lbs66,582 lbs
161,3-Butadiene106-99-045,992 lbs0 lbs45,992 lbs
171,2,4-Trimethylbenzene95-63-632,912 lbs105 lbs33,294 lbs
18Naphthalene91-20-320,385 lbs24 lbs21,740 lbs
19Cumene98-82-89,122 lbs10 lbs9,317 lbs
20Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
21Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
22Ethylene glycol107-21-15,553 lbs0 lbs5,562 lbs
23Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
24Polycyclic aromatic compoundsN5902,886 lbs117 lbs3,204 lbs
25Formaldehyde50-00-02,284 lbs0 lbs2,284 lbs
26Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
27Phenol108-95-2815 lbs1,155 lbs1,970 lbs
28Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
29Formic acid64-18-61,406 lbs0 lbs1,406 lbs
30Styrene100-42-51,198 lbs0 lbs1,198 lbs
31Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
32Chlorine7782-50-5268 lbs0 lbs268 lbs
33Nickel7440-02-0120 lbs0 lbs120 lbs
34Mercury7439-97-6106 lbs0 lbs106 lbs
35Certain glycol ethersN23092 lbs0 lbs92 lbs
36Manganese7439-96-570 lbs0 lbs70 lbs
37C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
38Chromium7440-47-340 lbs0 lbs40 lbs
39Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
40Lead compoundsN4202 lbs22 lbs23 lbs
41Benzo[g,h,i]perylene191-24-23 lbs7 lbs11 lbs
42Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
43Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Hydrogen cyanide, n-Hexane, Xylene (mixed isomers), Toluene, Benzene
View the full list of 37 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(37 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
2n-Hexane110-54-339,590 lbs0 lbs39,623 lbs
3Xylene (mixed isomers)1330-20-735,159 lbs25 lbs35,396 lbs
4Toluene108-88-322,119 lbs5 lbs22,142 lbs
5Benzene71-43-218,923 lbs4 lbs18,940 lbs
6Methanol67-56-115,730 lbs0 lbs15,730 lbs
7Hydrogen sulfide7783-06-414,345 lbs0 lbs14,345 lbs
8Propylene115-07-110,544 lbs0 lbs10,544 lbs
9Diethanolamine111-42-210,092 lbs0 lbs10,092 lbs
10Ammonia7664-41-79,731 lbs0 lbs9,731 lbs
11Ethylene74-85-19,396 lbs0 lbs9,396 lbs
12Vinyl acetate108-05-45,850 lbs0 lbs5,850 lbs
13Ethylbenzene100-41-44,409 lbs7 lbs4,449 lbs
14Cyclohexane110-82-74,403 lbs0 lbs4,421 lbs
151,2,4-Trimethylbenzene95-63-63,367 lbs0 lbs3,505 lbs
16Naphthalene91-20-31,403 lbs1 lbs1,422 lbs
171,3-Butadiene106-99-0956 lbs0 lbs956 lbs
18Dimethylamine124-40-3864 lbs0 lbs864 lbs
19Cumene98-82-8555 lbs0 lbs556 lbs
20Ethylene glycol107-21-1529 lbs0 lbs529 lbs
21Polycyclic aromatic compoundsN590353 lbs15 lbs369 lbs
22Acrylonitrile107-13-1278 lbs0 lbs278 lbs
23Phenol108-95-2255 lbs8 lbs263 lbs
24Formaldehyde50-00-0255 lbs0 lbs255 lbs
25Propylene oxide75-56-9255 lbs0 lbs255 lbs
26Formic acid64-18-6189 lbs0 lbs189 lbs
27Styrene100-42-5110 lbs0 lbs110 lbs
28Acetaldehyde75-07-045 lbs0 lbs45 lbs
29Biphenyl92-52-433 lbs0 lbs33 lbs
30Manganese7439-96-530 lbs0 lbs30 lbs
31Chromium7440-47-325 lbs0 lbs25 lbs
32Chlorine7782-50-525 lbs0 lbs25 lbs
33Nickel7440-02-024 lbs0 lbs24 lbs
34Certain glycol ethersN23011 lbs0 lbs11 lbs
35Mercury7439-97-67 lbs0 lbs7 lbs
36Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
37Lead And Lead CompoundsN4201 lbs1 lbs1 lbs
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