Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 814 Whelton Dr, Pasadena, TX 77503

HCAD #0910630000042
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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
814 Whelton Dr, Pasadena, TX 77503
Building Size
1,512sqft
Total structure area from HCAD building records.
Elevation
29.73 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)
39.57 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
292.2 acres
99.1% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$69,132
Based on HCAD building value of $106,358.
Depth-Damage (Neighborhood)
$77,621
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
15.5th percentile
Property Pollution Ranking
High
Higher pollution than 85% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
2.04 millionlbs
Extremely High
312.1x more than typical Houston property
≈ 102 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
979 thousandlbs
Extremely High
203.0x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
1.06 millionlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
9
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)2,036,164 lbs979,034 lbs1,057,131 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)180,194 lbs106,672 lbs73,522 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 85% 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):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Acetophenone, Methanol, Vinyl chloride, Acetaldehyde
View the full list of 38 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(38 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs1,038,744 lbs1,038,744 lbs
2Acetophenone98-86-2206,492 lbs3,645 lbs210,136 lbs
3Methanol67-56-1183,529 lbs7,563 lbs191,092 lbs
4Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
5Acetaldehyde75-07-092,740 lbs3,956 lbs96,696 lbs
6Cumene98-82-884,247 lbs11 lbs84,259 lbs
7Xylene (mixed isomers)1330-20-745,323 lbs33 lbs45,365 lbs
8Ethylene74-85-140,183 lbs0 lbs40,183 lbs
91,2,4-Trimethylbenzene95-63-636,587 lbs105 lbs36,695 lbs
10Toluene108-88-329,713 lbs27 lbs29,749 lbs
11n-Hexane110-54-320,905 lbs170 lbs21,076 lbs
12Boron trifluoride7637-07-214,388 lbs0 lbs14,388 lbs
13Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-013,465 lbs0 lbs13,465 lbs
14Benzene71-43-211,221 lbs24 lbs11,247 lbs
15Ammonia7664-41-74,450 lbs2,681 lbs7,131 lbs
16Chlorine7782-50-56,383 lbs0 lbs6,383 lbs
17Ethylbenzene100-41-45,951 lbs22 lbs5,975 lbs
18Phenol108-95-24,263 lbs0 lbs4,263 lbs
19Zinc compoundsN9824,126 lbs0 lbs4,126 lbs
20Ethylene glycol107-21-11,956 lbs0 lbs1,956 lbs
21o-Cresol95-48-71,585 lbs0 lbs1,585 lbs
22Maleic anhydride108-31-61,009 lbs0 lbs1,009 lbs
23Cyclohexane110-82-7995 lbs0 lbs995 lbs
24Naphthalene91-20-3935 lbs21 lbs957 lbs
25Formaldehyde50-00-0857 lbs0 lbs857 lbs
261,3-Butadiene106-99-0312 lbs0 lbs312 lbs
27Diethanolamine111-42-2205 lbs0 lbs205 lbs
28Diphenylamine122-39-4118 lbs0 lbs118 lbs
29Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
30Chromium7440-47-30 lbs33 lbs33 lbs
31Nickel7440-02-00 lbs31 lbs31 lbs
32Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
33Lead compoundsN4201 lbs22 lbs22 lbs
34Certain glycol ethersN23012 lbs0 lbs12 lbs
35Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
36Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
37Piperonyl butoxide51-03-64 lbs0 lbs4 lbs
38Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Acetophenone, Vinyl chloride, Acetaldehyde
View the full list of 33 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(33 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs72,435 lbs72,435 lbs
2Ethylene74-85-130,650 lbs0 lbs30,650 lbs
3Acetophenone98-86-217,719 lbs350 lbs18,069 lbs
4Vinyl chloride75-01-413,207 lbs1 lbs13,208 lbs
5Acetaldehyde75-07-08,300 lbs380 lbs8,680 lbs
6Cumene98-82-87,173 lbs0 lbs7,173 lbs
7Ammonia7664-41-74,450 lbs0 lbs4,450 lbs
8n-Hexane110-54-34,280 lbs0 lbs4,280 lbs
91,2,4-Trimethylbenzene95-63-64,000 lbs0 lbs4,000 lbs
10Xylene (mixed isomers)1330-20-73,675 lbs5 lbs3,680 lbs
11Methanol67-56-13,330 lbs336 lbs3,666 lbs
12Toluene108-88-32,900 lbs3 lbs2,903 lbs
13Phenol108-95-21,951 lbs0 lbs1,951 lbs
14Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
15Benzene71-43-21,130 lbs2 lbs1,132 lbs
16Chlorine7782-50-5487 lbs0 lbs487 lbs
17Ethylbenzene100-41-4427 lbs3 lbs430 lbs
18Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0395 lbs0 lbs395 lbs
19Zinc compoundsN982323 lbs0 lbs323 lbs
201,3-Butadiene106-99-0295 lbs0 lbs295 lbs
21Cyclohexane110-82-7232 lbs0 lbs232 lbs
22Naphthalene91-20-3132 lbs1 lbs133 lbs
23Maleic anhydride108-31-6132 lbs0 lbs132 lbs
24Formaldehyde50-00-099 lbs0 lbs99 lbs
25Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
26o-Cresol95-48-788 lbs0 lbs88 lbs
27Diphenylamine122-39-423 lbs0 lbs23 lbs
28Nickel7440-02-00 lbs2 lbs2 lbs
29Chromium7440-47-30 lbs2 lbs2 lbs
30Lead And Lead CompoundsN4201 lbs1 lbs1 lbs
31Certain glycol ethersN2301 lbs0 lbs1 lbs
32Ethylene glycol107-21-11 lbs0 lbs1 lbs
33Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs
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