Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 205 Calvin St, Pasadena, TX 77506

HCAD #0701280040009
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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
205 Calvin St, Pasadena, TX 77506
Building Size
792sqft
Total structure area from HCAD building records.
Elevation
25.58 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)
35.42 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
281.6 acres
95.5% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$19,676
Based on HCAD building value of $30,272.
Depth-Damage (Neighborhood)
$27,387
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
14.6th 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)
2.58 millionlbs
Extremely High
394.7x more than typical Houston property
≈ 129 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
2.57 millionlbs
Extremely High
533.6x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
2 thousandlbs
Very High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
6
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)2,575,305 lbs2,573,124 lbs2,181 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)218,454 lbs218,416 lbs38 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):
Hydrogen cyanide, n-Hexane, Xylene (mixed isomers), Hydrogen sulfide, Propylene
View the full list of 30 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(30 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Hydrogen cyanide74-90-8818,552 lbs0 lbs818,552 lbs
2n-Hexane110-54-3382,903 lbs0 lbs382,910 lbs
3Xylene (mixed isomers)1330-20-7228,979 lbs627 lbs229,636 lbs
4Hydrogen sulfide7783-06-4206,443 lbs0 lbs206,443 lbs
5Propylene115-07-1193,971 lbs0 lbs193,971 lbs
6Benzene71-43-2188,730 lbs94 lbs188,835 lbs
7Toluene108-88-3168,438 lbs175 lbs168,637 lbs
8Ethylene74-85-1127,617 lbs0 lbs127,617 lbs
9Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
10Cyclohexane110-82-752,501 lbs0 lbs52,510 lbs
11Ammonia7664-41-735,600 lbs0 lbs35,600 lbs
12Ethylbenzene100-41-427,944 lbs4 lbs27,956 lbs
131,3-Butadiene106-99-016,921 lbs0 lbs16,921 lbs
14Ethylene glycol107-21-15,255 lbs0 lbs5,264 lbs
15Naphthalene91-20-34,616 lbs3 lbs4,627 lbs
161,2,4-Trimethylbenzene95-63-63,713 lbs0 lbs3,727 lbs
17Polycyclic aromatic compoundsN5902,862 lbs115 lbs3,179 lbs
18Methanol67-56-12,293 lbs0 lbs2,293 lbs
19Cumene98-82-81,656 lbs0 lbs1,658 lbs
20Styrene100-42-51,198 lbs0 lbs1,198 lbs
21Phenol108-95-20 lbs1,155 lbs1,155 lbs
22Biphenyl92-52-4345 lbs0 lbs364 lbs
23Nickel7440-02-0120 lbs0 lbs120 lbs
24Certain glycol ethersN23080 lbs0 lbs80 lbs
25Mercury7439-97-677 lbs0 lbs77 lbs
26Manganese7439-96-570 lbs0 lbs70 lbs
27C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
28Chromium7440-47-340 lbs0 lbs40 lbs
29Benzo[g,h,i]perylene191-24-20 lbs7 lbs7 lbs
30Lead compoundsN4201 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 26 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(26 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
2n-Hexane110-54-334,482 lbs0 lbs34,482 lbs
3Xylene (mixed isomers)1330-20-726,770 lbs10 lbs26,780 lbs
4Toluene108-88-315,998 lbs0 lbs15,998 lbs
5Benzene71-43-214,621 lbs0 lbs14,621 lbs
6Hydrogen sulfide7783-06-413,422 lbs0 lbs13,422 lbs
7Diethanolamine111-42-210,092 lbs0 lbs10,092 lbs
8Propylene115-07-19,425 lbs0 lbs9,425 lbs
9Ethylene74-85-18,875 lbs0 lbs8,875 lbs
10Cyclohexane110-82-74,048 lbs0 lbs4,048 lbs
11Ethylbenzene100-41-42,721 lbs0 lbs2,721 lbs
12Ammonia7664-41-71,783 lbs0 lbs1,783 lbs
13Naphthalene91-20-3761 lbs0 lbs761 lbs
14Ethylene glycol107-21-1500 lbs0 lbs500 lbs
15Polycyclic aromatic compoundsN590353 lbs15 lbs368 lbs
161,2,4-Trimethylbenzene95-63-6305 lbs0 lbs305 lbs
17Cumene98-82-8293 lbs0 lbs293 lbs
18Styrene100-42-5110 lbs0 lbs110 lbs
19Biphenyl92-52-433 lbs0 lbs33 lbs
20Manganese7439-96-530 lbs0 lbs30 lbs
21Chromium7440-47-325 lbs0 lbs25 lbs
22Nickel7440-02-024 lbs0 lbs24 lbs
23Certain glycol ethersN23010 lbs0 lbs10 lbs
24Phenol108-95-20 lbs8 lbs8 lbs
25Mercury7439-97-67 lbs0 lbs7 lbs
26Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
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