Data-driven insights for local properties

📊 Environmental Assessment Report

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.

🌊 Part 1: Flood Risk Analysis

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
302 CALVIN ST PASADENA 77506
Building Size
1,740 sqft
Total structure area from HCAD building records.
Elevation
25.26 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very Low
Risk based on FEMA zone and simulation.

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 Low
Flood Depth
0 ft ±0.5 ft
No flooding at current water level.
Water Surface Elevation (WSE)
N/A
Water surface elevation data not available.
Area Inundated
N/A
Data not available
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage Estimate (HCAD Valuation)
$0
Property not flooded at current water level. No damage to calculate.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Property not flooded at current water level. No damage to calculate.
Analysis Method
COG Bathtub 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 Safe
Safety Margin: 15.26 feet
Severity: Safe

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.

  • FEMA Zone X (minimal hazard) - flood insurance available at preferred rates.
  • Review the interactive flood simulator to understand how different rainfall events could affect this property.
  • Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking
High
Higher pollution than 88% of Houston homes
This ranking compares pollution levels within 2 miles of this property against 10,000 randomly sampled Houston metro properties. Lower percentiles indicate higher pollution exposure.
Industrial Pollution Nearby (Last 10 Years)
4.55 million lbs
Extremely High
697.0x more than typical Houston property
≈ 227 dump trucks of chemicals within 2 miles
Total chemical releases from all industrial facilities within a 2-mile radius over the past decade (2014–2024). Data from EPA's Toxic Release Inventory tracking air, water, and land discharges.
💨 Air Pollution (Last 10 Years)
4.55 million lbs
Extremely High
942.5x more than typical Houston property
Chemicals released into the air from nearby facilities over 10 years. Includes both fugitive emissions (leaks, evaporation) and stack emissions (smokestacks, vents). May affect local air quality.
💧 Water Pollution (Last 10 Years)
2 thousand lbs
Very High
Most Houston properties have none nearby
Chemical discharges to surface water (bayous, streams, drainage) from industrial facilities within 2 miles over the past decade. May impact local waterways and drainage systems.

❤️ 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)4,547,634 lbs4,545,284 lbs2,351 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)337,918 lbs240,690 lbs56 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 15% most polluted).

Top chemicals released near this property (past 10 years):

Hydrogen cyanide, n-Hexane, Propylene, Xylene (mixed isomers), Toluene

View the full list of 33 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (33 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Hydrogen cyanide74-90-81,032,286 lbs0 lbs1,032,286 lbs
2n-Hexane110-54-31,028,397 lbs0 lbs1,028,816 lbs
3Propylene115-07-1465,601 lbs0 lbs465,601 lbs
4Xylene (mixed isomers)1330-20-7389,057 lbs723 lbs392,140 lbs
5Toluene108-88-3274,961 lbs191 lbs276,033 lbs
6Benzene71-43-2263,860 lbs114 lbs264,538 lbs
7Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9250,113 lbs0 lbs250,113 lbs
8Hydrogen sulfide7783-06-4244,215 lbs0 lbs244,216 lbs
9Ethylene74-85-1206,072 lbs0 lbs206,072 lbs
10Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
11Cyclohexane110-82-766,577 lbs0 lbs67,345 lbs
12Ethylbenzene100-41-459,964 lbs43 lbs60,607 lbs
13Ammonia7664-41-758,605 lbs0 lbs58,605 lbs
141,3-Butadiene106-99-045,992 lbs0 lbs45,992 lbs
15Naphthalene91-20-319,868 lbs3 lbs21,201 lbs
161,2,4-Trimethylbenzene95-63-611,040 lbs0 lbs11,314 lbs
17Cumene98-82-88,769 lbs0 lbs8,953 lbs
18Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
19Ethylene glycol107-21-15,255 lbs0 lbs5,264 lbs
20Polycyclic aromatic compoundsN5902,884 lbs115 lbs3,200 lbs
21Methanol67-56-12,293 lbs0 lbs2,293 lbs
22Styrene100-42-51,198 lbs0 lbs1,198 lbs
23Phenol108-95-20 lbs1,155 lbs1,155 lbs
24Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
25Chlorine7782-50-5268 lbs0 lbs268 lbs
26Nickel7440-02-0120 lbs0 lbs120 lbs
27Mercury7439-97-6106 lbs0 lbs106 lbs
28Certain glycol ethersN23080 lbs0 lbs80 lbs
29Manganese7439-96-570 lbs0 lbs70 lbs
30Chromium7440-47-340 lbs0 lbs40 lbs
31C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
32Benzo[g,h,i]perylene191-24-23 lbs7 lbs11 lbs
33Lead compoundsN4201 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Diethanolamine, Hydrogen cyanide, n-Hexane, Xylene (mixed isomers), Toluene

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)
1Diethanolamine111-42-210,092 lbs0 lbs85,621 lbs
2Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
3n-Hexane110-54-337,270 lbs0 lbs37,303 lbs
4Xylene (mixed isomers)1330-20-731,869 lbs20 lbs32,200 lbs
5Toluene108-88-319,219 lbs2 lbs19,291 lbs
6Benzene71-43-217,793 lbs2 lbs17,907 lbs
7Hydrogen sulfide7783-06-414,345 lbs0 lbs14,345 lbs
8Ammonia7664-41-73,053 lbs0 lbs11,360 lbs
9Propylene115-07-110,544 lbs0 lbs10,544 lbs
10Ethylene74-85-19,396 lbs0 lbs9,396 lbs
11Ethylene glycol107-21-1500 lbs0 lbs7,519 lbs
12Cyclohexane110-82-74,171 lbs0 lbs4,189 lbs
13Ethylbenzene100-41-43,982 lbs4 lbs4,025 lbs
14Phenol108-95-20 lbs8 lbs2,825 lbs
15Naphthalene91-20-31,357 lbs0 lbs1,436 lbs
161,2,4-Trimethylbenzene95-63-61,267 lbs0 lbs1,408 lbs
17Certain glycol ethersN23010 lbs0 lbs1,121 lbs
181,3-Butadiene106-99-0956 lbs0 lbs956 lbs
19Nickel And Nickel CompoundsN4950 lbs0 lbs915 lbs
20Cumene98-82-8531 lbs0 lbs532 lbs
21Lead And Lead CompoundsN4200 lbs0 lbs390 lbs
22Polycyclic aromatic compoundsN590353 lbs15 lbs368 lbs
23Lead compoundsN4200 lbs0 lbs269 lbs
24Styrene100-42-5110 lbs0 lbs110 lbs
25Biphenyl92-52-433 lbs0 lbs33 lbs
26Manganese7439-96-530 lbs0 lbs30 lbs
27Chlorine7782-50-525 lbs0 lbs25 lbs
28Chromium7440-47-325 lbs0 lbs25 lbs
29Nickel7440-02-024 lbs0 lbs24 lbs
30Lead7439-92-10 lbs0 lbs8 lbs
31Mercury7439-97-67 lbs0 lbs7 lbs
32Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
33Vanadium (except when contained in an alloy)7440-62-20 lbs0 lbs3 lbs

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