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
1308 COMAL AVE PASADENA 77506
Building Size
3,117 sqft
Total structure area from HCAD building records.
Elevation
26.25 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: 16.25 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 89% 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)
6.57 million lbs
Extremely High
1006.8x more than typical Houston property
≈ 328 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)
6.5 million lbs
Extremely High
1348.0x 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)
68 thousand lbs
Extremely 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)6,568,801 lbs6,500,730 lbs68,072 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)595,188 lbs497,683 lbs940 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 15% most polluted).

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

Styrene, Ammonia, Propylene, Hydrogen cyanide, n-Hexane

View the full list of 36 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (36 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Styrene100-42-51,724,969 lbs7,271 lbs1,732,240 lbs
2Ammonia7664-41-71,115,926 lbs26,223 lbs1,142,148 lbs
3Propylene115-07-1936,912 lbs0 lbs936,912 lbs
4Hydrogen cyanide74-90-8818,552 lbs0 lbs818,552 lbs
5n-Hexane110-54-3395,710 lbs0 lbs395,717 lbs
6Ethylene74-85-1292,319 lbs0 lbs292,319 lbs
7Xylene (mixed isomers)1330-20-7231,926 lbs627 lbs232,583 lbs
8Hydrogen sulfide7783-06-4206,443 lbs0 lbs206,443 lbs
9Benzene71-43-2205,652 lbs457 lbs206,120 lbs
101,3-Butadiene106-99-0197,106 lbs1 lbs197,107 lbs
11Toluene108-88-3169,716 lbs244 lbs169,984 lbs
12Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
13Cyclohexane110-82-752,501 lbs0 lbs52,510 lbs
14Ethylbenzene100-41-428,148 lbs63 lbs28,219 lbs
15Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs21,954 lbs21,954 lbs
16Sodium nitrite7632-00-00 lbs9,470 lbs9,470 lbs
17Ethylene glycol107-21-15,255 lbs0 lbs5,264 lbs
18Naphthalene91-20-34,762 lbs75 lbs4,845 lbs
191,2,4-Trimethylbenzene95-63-63,713 lbs0 lbs3,727 lbs
20Polycyclic aromatic compoundsN5902,865 lbs525 lbs3,592 lbs
21Methanol67-56-13,468 lbs0 lbs3,468 lbs
22Cumene98-82-81,656 lbs0 lbs1,658 lbs
23Phenol108-95-20 lbs1,155 lbs1,155 lbs
24Biphenyl92-52-4345 lbs0 lbs364 lbs
25Chlorine7782-50-5120 lbs0 lbs120 lbs
26Nickel7440-02-0120 lbs0 lbs120 lbs
27Certain glycol ethersN23080 lbs0 lbs80 lbs
28Mercury7439-97-677 lbs0 lbs77 lbs
29Manganese7439-96-570 lbs0 lbs70 lbs
30Isoprene78-79-560 lbs0 lbs60 lbs
31C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
32Chromium7440-47-340 lbs0 lbs40 lbs
33Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
34Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
35Benzo[g,h,i]perylene191-24-20 lbs7 lbs7 lbs
36Lead compoundsN4201 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Styrene, Ammonia, Diethanolamine, Hydrogen cyanide, n-Hexane

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
2Ammonia7664-41-7103,533 lbs78 lbs111,884 lbs
3Diethanolamine111-42-210,092 lbs0 lbs85,621 lbs
4Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
5n-Hexane110-54-335,588 lbs0 lbs35,588 lbs
6Propylene115-07-133,225 lbs0 lbs33,225 lbs
7Xylene (mixed isomers)1330-20-726,894 lbs10 lbs26,920 lbs
8Ethylene74-85-116,725 lbs0 lbs16,725 lbs
9Benzene71-43-215,721 lbs110 lbs16,310 lbs
10Toluene108-88-316,108 lbs4 lbs16,165 lbs
11Hydrogen sulfide7783-06-413,422 lbs0 lbs13,422 lbs
121,3-Butadiene106-99-012,735 lbs0 lbs12,735 lbs
13Ethylene glycol107-21-1500 lbs0 lbs7,519 lbs
14Cyclohexane110-82-74,048 lbs0 lbs4,048 lbs
15Phenol108-95-20 lbs8 lbs2,825 lbs
16Ethylbenzene100-41-42,726 lbs1 lbs2,734 lbs
17Certain glycol ethersN23010 lbs0 lbs1,121 lbs
18Nickel And Nickel CompoundsN4950 lbs0 lbs915 lbs
19Naphthalene91-20-3763 lbs7 lbs831 lbs
20Polycyclic aromatic compoundsN590354 lbs55 lbs409 lbs
21Sodium nitrite7632-00-00 lbs371 lbs371 lbs
221,2,4-Trimethylbenzene95-63-6305 lbs0 lbs308 lbs
23Cumene98-82-8293 lbs0 lbs293 lbs
24Lead compoundsN4200 lbs0 lbs269 lbs
25Biphenyl92-52-433 lbs0 lbs33 lbs
26Manganese7439-96-530 lbs0 lbs30 lbs
27Chromium7440-47-325 lbs0 lbs25 lbs
28Nickel7440-02-024 lbs0 lbs24 lbs
29Isoprene78-79-58 lbs0 lbs8 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
34Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs3 lbs

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