Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 428 Trichelle St, Pasadena, TX 77506

HCAD #0752150030021
🧭Jump to Section
🌍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
428 Trichelle St, Pasadena, TX 77506
Building Size
1,650sqft
Total structure area from HCAD building records.
Elevation
24.03 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)
33.87 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
247.1 acres
83.8% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$25,899
Based on HCAD building value of $39,845.
Depth-Damage (Neighborhood)
$61,851
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
9.6th percentile
Property Pollution Ranking
Very High
Higher pollution than 90% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
8.97 millionlbs
Extremely High
1374.3x more than typical Houston property
≈ 448 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
8.9 millionlbs
Extremely High
1844.9x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
69 thousandlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
15
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)8,966,099 lbs8,896,628 lbs69,471 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)537,151 lbs535,676 lbs991 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 90% 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):
Styrene, Ammonia, Propylene, n-Hexane, Hydrogen cyanide
View the full list of 47 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(47 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Styrene100-42-51,724,969 lbs7,271 lbs1,732,240 lbs
2Ammonia7664-41-71,203,746 lbs26,223 lbs1,229,969 lbs
3Propylene115-07-11,208,542 lbs0 lbs1,208,542 lbs
4n-Hexane110-54-31,088,179 lbs0 lbs1,088,598 lbs
5Hydrogen cyanide74-90-81,032,286 lbs0 lbs1,032,286 lbs
6Xylene (mixed isomers)1330-20-7407,994 lbs723 lbs411,077 lbs
7Ethylene74-85-1370,774 lbs0 lbs370,774 lbs
8Benzene71-43-2295,713 lbs477 lbs296,754 lbs
9Toluene108-88-3287,428 lbs260 lbs288,569 lbs
10Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9250,113 lbs0 lbs250,113 lbs
11Hydrogen sulfide7783-06-4244,215 lbs0 lbs244,216 lbs
121,3-Butadiene106-99-0226,177 lbs1 lbs226,178 lbs
13n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
14Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
15Cyclohexane110-82-766,580 lbs0 lbs67,349 lbs
16Methanol67-56-163,649 lbs0 lbs63,649 lbs
17Ethylbenzene100-41-460,168 lbs102 lbs60,870 lbs
18Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
19Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
20Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs21,954 lbs21,954 lbs
21Naphthalene91-20-320,014 lbs75 lbs21,419 lbs
22Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
231,2,4-Trimethylbenzene95-63-611,118 lbs0 lbs11,536 lbs
24Sodium nitrite7632-00-00 lbs9,470 lbs9,470 lbs
25Cumene98-82-88,769 lbs0 lbs8,953 lbs
26Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
27Ethylene glycol107-21-15,255 lbs0 lbs5,264 lbs
28Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
29Polycyclic aromatic compoundsN5902,887 lbs525 lbs3,613 lbs
30Zinc compoundsN982219 lbs1,181 lbs2,891 lbs
31Phenol108-95-20 lbs1,155 lbs1,155 lbs
32Chlorine7782-50-5388 lbs0 lbs388 lbs
33Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
34Mercury compoundsN458165 lbs1 lbs166 lbs
35Nickel7440-02-0120 lbs0 lbs120 lbs
36Mercury7439-97-6106 lbs0 lbs106 lbs
37Mercury And Mercury CompoundsN45897 lbs0 lbs97 lbs
38Certain glycol ethersN23080 lbs0 lbs80 lbs
39Manganese7439-96-570 lbs0 lbs70 lbs
40Isoprene78-79-560 lbs0 lbs60 lbs
41Lead compoundsN4206 lbs46 lbs52 lbs
42Chromium7440-47-340 lbs0 lbs40 lbs
43C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
44Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
45Benzo[g,h,i]perylene191-24-23 lbs7 lbs11 lbs
46Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
47Lead And Lead CompoundsN4202 lbs1 lbs3 lbs
📋
Top chemicals released near this property (2024 only):
Styrene, Ammonia, Hydrogen cyanide, n-Hexane, Xylene (mixed isomers)
View the full list of 34 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(34 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Styrene100-42-5130,785 lbs291 lbs131,077 lbs
2Ammonia7664-41-7111,684 lbs78 lbs111,761 lbs
3Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
4n-Hexane110-54-341,391 lbs0 lbs41,424 lbs
5Xylene (mixed isomers)1330-20-734,944 lbs20 lbs35,176 lbs
6Propylene115-07-134,344 lbs0 lbs34,344 lbs
7Toluene108-88-321,164 lbs6 lbs21,188 lbs
8Benzene71-43-219,886 lbs112 lbs20,011 lbs
9Ethylene74-85-117,246 lbs0 lbs17,246 lbs
10Hydrogen sulfide7783-06-414,345 lbs0 lbs14,345 lbs
111,3-Butadiene106-99-013,691 lbs0 lbs13,691 lbs
12Diethanolamine111-42-210,092 lbs0 lbs10,092 lbs
13Cyclohexane110-82-74,171 lbs0 lbs4,189 lbs
14Ethylbenzene100-41-43,987 lbs5 lbs4,025 lbs
151,2,4-Trimethylbenzene95-63-61,267 lbs0 lbs1,405 lbs
16Naphthalene91-20-31,359 lbs7 lbs1,384 lbs
17Cumene98-82-8531 lbs0 lbs532 lbs
18Ethylene glycol107-21-1500 lbs0 lbs500 lbs
19Polycyclic aromatic compoundsN590354 lbs55 lbs409 lbs
20Sodium nitrite7632-00-00 lbs371 lbs371 lbs
21Zinc compoundsN98222 lbs32 lbs54 lbs
22Biphenyl92-52-433 lbs0 lbs33 lbs
23Manganese7439-96-530 lbs0 lbs30 lbs
24Chromium7440-47-325 lbs0 lbs25 lbs
25Chlorine7782-50-525 lbs0 lbs25 lbs
26Nickel7440-02-024 lbs0 lbs24 lbs
27Mercury And Mercury CompoundsN45821 lbs0 lbs21 lbs
28Certain glycol ethersN23010 lbs0 lbs10 lbs
29Phenol108-95-20 lbs8 lbs8 lbs
30Isoprene78-79-58 lbs0 lbs8 lbs
31Mercury7439-97-67 lbs0 lbs7 lbs
32Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
33Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs2 lbs
34Lead And Lead CompoundsN4200 lbs0 lbs1 lbs
Loading property data...
🏘️Explore More Properties