Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 318 Winona Dr, Pasadena, TX 77506

HCAD #0660670020012
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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
318 Winona Dr, Pasadena, TX 77506
Building Size
1,265sqft
Total structure area from HCAD building records.
Elevation
14.12 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
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)
23.96 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
294.9 acres
100.0% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$27,654
Based on HCAD building value of $42,545.
Depth-Damage (Neighborhood)
$27,652
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
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
11.4th percentile
Property Pollution Ranking
High
Higher pollution than 89% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
5.46 millionlbs
Extremely High
837.3x more than typical Houston property
≈ 273 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
5.46 millionlbs
Extremely High
1132.1x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
4 thousandlbs
Very High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
17
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)5,462,942 lbs5,459,282 lbs3,659 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)290,390 lbs289,422 lbs120 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 89% 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):
n-Hexane, Hydrogen cyanide, Propylene, Xylene (mixed isomers), Methanol
View the full list of 50 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(50 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1n-Hexane110-54-31,093,507 lbs9 lbs1,094,006 lbs
2Hydrogen cyanide74-90-81,032,286 lbs0 lbs1,032,286 lbs
3Propylene115-07-1465,601 lbs0 lbs465,601 lbs
4Xylene (mixed isomers)1330-20-7410,289 lbs741 lbs413,461 lbs
5Methanol67-56-1329,619 lbs0 lbs329,619 lbs
6Toluene108-88-3292,889 lbs208 lbs294,065 lbs
7Benzene71-43-2282,090 lbs123 lbs282,795 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
10Ammonia7664-41-7216,283 lbs0 lbs216,283 lbs
11Ethylene74-85-1206,072 lbs0 lbs206,072 lbs
12n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
13Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
14Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
15Cyclohexane110-82-766,580 lbs0 lbs67,349 lbs
16Ethylbenzene100-41-461,073 lbs59 lbs61,769 lbs
171,3-Butadiene106-99-045,992 lbs0 lbs45,992 lbs
18Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
19Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
20Naphthalene91-20-320,002 lbs3 lbs21,340 lbs
211,2,4-Trimethylbenzene95-63-613,848 lbs0 lbs14,337 lbs
22Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
23Cumene98-82-88,938 lbs0 lbs9,127 lbs
24Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
25Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
26Ethylene glycol107-21-15,553 lbs0 lbs5,562 lbs
27Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
28Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
29Polycyclic aromatic compoundsN5902,907 lbs115 lbs3,223 lbs
30Zinc compoundsN982219 lbs1,181 lbs2,891 lbs
31Formaldehyde50-00-02,284 lbs0 lbs2,284 lbs
32Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
33Phenol108-95-2815 lbs1,155 lbs1,970 lbs
34Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
35Formic acid64-18-61,406 lbs0 lbs1,406 lbs
36Styrene100-42-51,198 lbs0 lbs1,198 lbs
37Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
38Chlorine7782-50-5268 lbs0 lbs268 lbs
39Mercury compoundsN458165 lbs1 lbs166 lbs
40Nickel7440-02-0120 lbs0 lbs120 lbs
41Mercury7439-97-6106 lbs0 lbs106 lbs
42Mercury And Mercury CompoundsN45897 lbs0 lbs97 lbs
43Certain glycol ethersN23080 lbs0 lbs80 lbs
44Manganese7439-96-570 lbs0 lbs70 lbs
45Lead compoundsN4208 lbs51 lbs59 lbs
46Chromium7440-47-340 lbs0 lbs40 lbs
47C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
48Anthracene120-12-731 lbs0 lbs31 lbs
49Benzo[g,h,i]perylene191-24-23 lbs7 lbs11 lbs
50Lead And Lead CompoundsN4202 lbs6 lbs8 lbs
📋
Top chemicals released near this property (2024 only):
Hydrogen cyanide, n-Hexane, Xylene (mixed isomers), Toluene, Benzene
View the full list of 39 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(39 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
2n-Hexane110-54-341,355 lbs0 lbs41,459 lbs
3Xylene (mixed isomers)1330-20-735,100 lbs28 lbs35,411 lbs
4Toluene108-88-321,574 lbs10 lbs21,689 lbs
5Benzene71-43-219,226 lbs4 lbs19,261 lbs
6Ammonia7664-41-716,612 lbs0 lbs16,612 lbs
7Methanol67-56-115,730 lbs0 lbs15,730 lbs
8Hydrogen sulfide7783-06-414,345 lbs0 lbs14,345 lbs
9Propylene115-07-110,544 lbs0 lbs10,544 lbs
10Diethanolamine111-42-210,092 lbs0 lbs10,092 lbs
11Ethylene74-85-19,396 lbs0 lbs9,396 lbs
12Vinyl acetate108-05-45,850 lbs0 lbs5,850 lbs
13Cyclohexane110-82-74,171 lbs0 lbs4,189 lbs
14Ethylbenzene100-41-44,107 lbs12 lbs4,189 lbs
151,2,4-Trimethylbenzene95-63-61,381 lbs0 lbs1,590 lbs
16Naphthalene91-20-31,368 lbs0 lbs1,391 lbs
171,3-Butadiene106-99-0956 lbs0 lbs956 lbs
18Dimethylamine124-40-3864 lbs0 lbs864 lbs
19Cumene98-82-8556 lbs0 lbs562 lbs
20Ethylene glycol107-21-1529 lbs0 lbs529 lbs
21Polycyclic aromatic compoundsN590353 lbs15 lbs368 lbs
22Acrylonitrile107-13-1278 lbs0 lbs278 lbs
23Phenol108-95-2255 lbs8 lbs263 lbs
24Propylene oxide75-56-9255 lbs0 lbs255 lbs
25Formaldehyde50-00-0255 lbs0 lbs255 lbs
26Formic acid64-18-6189 lbs0 lbs189 lbs
27Styrene100-42-5110 lbs0 lbs110 lbs
28Zinc compoundsN98222 lbs32 lbs54 lbs
29Acetaldehyde75-07-045 lbs0 lbs45 lbs
30Biphenyl92-52-433 lbs0 lbs33 lbs
31Manganese7439-96-530 lbs0 lbs30 lbs
32Chlorine7782-50-525 lbs0 lbs25 lbs
33Chromium7440-47-325 lbs0 lbs25 lbs
34Nickel7440-02-024 lbs0 lbs24 lbs
35Mercury And Mercury CompoundsN45821 lbs0 lbs21 lbs
36Certain glycol ethersN23010 lbs0 lbs10 lbs
37Mercury7439-97-67 lbs0 lbs7 lbs
38Lead And Lead CompoundsN4200 lbs5 lbs6 lbs
39Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
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