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
118 MCMASTERS AVE PASADENA 77506
Building Size
2,123 sqft
Total structure area from HCAD building records.
Elevation
22.74 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: 12.74 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
Very High
Higher pollution than 90% 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)
8.45 million lbs
Extremely High
1295.8x more than typical Houston property
≈ 423 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)
8.41 million lbs
Extremely High
1744.1x 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)
43 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)8,454,193 lbs8,410,804 lbs43,389 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)744,890 lbs572,014 lbs676 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 15% most polluted).

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

n-Hexane, Ethylene, Hydrogen cyanide, Ammonia, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 52 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (52 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-31,530,198 lbs179 lbs1,530,868 lbs
2Ethylene74-85-11,431,475 lbs0 lbs1,431,475 lbs
3Hydrogen cyanide74-90-81,032,286 lbs0 lbs1,032,286 lbs
4Ammonia7664-41-7848,961 lbs33,581 lbs882,542 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9528,487 lbs0 lbs528,487 lbs
6Propylene115-07-1465,727 lbs0 lbs465,727 lbs
7Xylene (mixed isomers)1330-20-7454,237 lbs774 lbs457,451 lbs
8Toluene108-88-3346,279 lbs235 lbs347,491 lbs
9Methanol67-56-1335,757 lbs0 lbs335,757 lbs
10Benzene71-43-2293,985 lbs147 lbs294,717 lbs
111,3-Butadiene106-99-0249,321 lbs0 lbs249,322 lbs
12Hydrogen sulfide7783-06-4244,215 lbs0 lbs244,216 lbs
13n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
14Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
15Cyclohexane110-82-782,232 lbs0 lbs83,001 lbs
16Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
17Ethylbenzene100-41-467,198 lbs81 lbs67,918 lbs
181,2,4-Trimethylbenzene95-63-635,720 lbs105 lbs36,317 lbs
19Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
20Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
21Naphthalene91-20-320,519 lbs24 lbs21,879 lbs
22Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
23Isoprene78-79-513,272 lbs0 lbs13,272 lbs
24Cumene98-82-89,291 lbs10 lbs9,491 lbs
25Zinc compoundsN9822,208 lbs6,916 lbs9,124 lbs
26Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
27Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
28Ethylene glycol107-21-15,553 lbs0 lbs5,562 lbs
29Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
30Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
31Polycyclic aromatic compoundsN5902,909 lbs117 lbs3,228 lbs
32Formaldehyde50-00-02,284 lbs0 lbs2,284 lbs
33Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
34Phenol108-95-2815 lbs1,155 lbs1,970 lbs
35Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
36Formic acid64-18-61,406 lbs0 lbs1,406 lbs
37Styrene100-42-51,198 lbs0 lbs1,198 lbs
38Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
39Chlorine7782-50-5273 lbs0 lbs273 lbs
40Nickel7440-02-0120 lbs0 lbs120 lbs
41Mercury7439-97-6106 lbs0 lbs106 lbs
42Certain glycol ethersN23092 lbs0 lbs92 lbs
43Manganese7439-96-570 lbs0 lbs70 lbs
44Chromium7440-47-340 lbs0 lbs40 lbs
45C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
46Anthracene120-12-731 lbs0 lbs31 lbs
47Lead compoundsN4204 lbs27 lbs30 lbs
48Lead And Lead CompoundsN4203 lbs27 lbs30 lbs
49Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
50Benzo[g,h,i]perylene191-24-23 lbs7 lbs11 lbs
51Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
52Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

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

View the full list of 48 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (48 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene74-85-1138,520 lbs0 lbs138,520 lbs
2Ammonia7664-41-791,475 lbs93 lbs127,288 lbs
3Diethanolamine111-42-210,092 lbs0 lbs85,621 lbs
4Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
5n-Hexane110-54-356,430 lbs0 lbs56,540 lbs
6Xylene (mixed isomers)1330-20-738,390 lbs33 lbs38,806 lbs
71,3-Butadiene106-99-033,626 lbs0 lbs33,626 lbs
8Zinc compoundsN982355 lbs481 lbs28,303 lbs
9Toluene108-88-324,676 lbs13 lbs26,690 lbs
10Benzene71-43-220,461 lbs6 lbs20,600 lbs
11Methanol67-56-115,730 lbs0 lbs20,533 lbs
12Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-917,341 lbs0 lbs17,341 lbs
13Hydrogen sulfide7783-06-414,345 lbs0 lbs14,345 lbs
14Propylene115-07-110,627 lbs0 lbs10,627 lbs
15Ethylene glycol107-21-1529 lbs0 lbs7,568 lbs
16Vanadium compoundsN7700 lbs0 lbs6,689 lbs
17Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
18Cyclohexane110-82-74,697 lbs0 lbs4,715 lbs
19Ethylbenzene100-41-44,534 lbs15 lbs4,625 lbs
201,2,4-Trimethylbenzene95-63-63,481 lbs0 lbs3,693 lbs
21Phenol108-95-2255 lbs8 lbs3,101 lbs
22Isoprene78-79-52,371 lbs0 lbs2,371 lbs
23Formaldehyde50-00-0255 lbs0 lbs2,348 lbs
24Formic acid64-18-6189 lbs0 lbs1,968 lbs
25Naphthalene91-20-31,414 lbs1 lbs1,500 lbs
26Lead And Lead CompoundsN4201 lbs6 lbs1,179 lbs
27Certain glycol ethersN23011 lbs0 lbs1,122 lbs
28Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0901 lbs0 lbs1,095 lbs
29Nickel And Nickel CompoundsN4950 lbs0 lbs915 lbs
30Dimethylamine124-40-3864 lbs0 lbs884 lbs
31Cumene98-82-8580 lbs0 lbs586 lbs
32Lead compoundsN4200 lbs0 lbs430 lbs
33Perfluorooctanoic acid335-67-10 lbs0 lbs402 lbs
34Polycyclic aromatic compoundsN590353 lbs15 lbs369 lbs
35Acrylonitrile107-13-1278 lbs0 lbs294 lbs
36Propylene oxide75-56-9255 lbs0 lbs255 lbs
37Styrene100-42-5110 lbs0 lbs110 lbs
38Mercury compoundsN4580 lbs0 lbs46 lbs
39Acetaldehyde75-07-045 lbs0 lbs45 lbs
40Biphenyl92-52-433 lbs0 lbs33 lbs
41Manganese7439-96-530 lbs0 lbs30 lbs
42Chromium7440-47-325 lbs0 lbs25 lbs
43Chlorine7782-50-525 lbs0 lbs25 lbs
44Nickel7440-02-024 lbs0 lbs24 lbs
45Lead7439-92-10 lbs0 lbs8 lbs
46Mercury7439-97-67 lbs0 lbs7 lbs
47Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
48Vanadium (except when contained in an alloy)7440-62-20 lbs0 lbs3 lbs

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