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
218 N PRESTON AVE C PASADENA 77503
Elevation
28.29 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
Vacant lot (no building data). No structure to calculate damage for.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Vacant lot (no building data). No structure to calculate damage for.
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: 18.29 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)
5.98 million lbs
Extremely High
916.4x more than typical Houston property
≈ 299 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)
4.91 million lbs
Extremely High
1019.1x 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)
1.06 million 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)5,979,101 lbs4,914,206 lbs1,064,895 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)561,809 lbs439,737 lbs74,028 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):

Ethylene, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Cumene, n-Hexane, Methanol

View the full list of 62 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (62 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Ethylene74-85-11,557,991 lbs0 lbs1,557,991 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs1,038,744 lbs1,038,744 lbs
3Cumene98-82-8518,059 lbs11 lbs518,071 lbs
4n-Hexane110-54-3513,257 lbs221 lbs513,519 lbs
5Methanol67-56-1448,119 lbs7,563 lbs455,682 lbs
6Propylene115-07-1289,050 lbs0 lbs289,050 lbs
7Acetophenone98-86-2206,492 lbs3,645 lbs210,136 lbs
8Benzene71-43-2172,558 lbs27 lbs172,587 lbs
9Vinyl chloride75-01-4166,976 lbs14 lbs166,990 lbs
10Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0156,836 lbs0 lbs156,836 lbs
11Aluminum (fume or dust)7429-90-5132,790 lbs0 lbs132,800 lbs
12Ammonia7664-41-7113,137 lbs2,681 lbs115,819 lbs
13Acetaldehyde75-07-098,856 lbs3,956 lbs102,812 lbs
14Toluene108-88-393,731 lbs557 lbs94,333 lbs
15Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
16Xylene (mixed isomers)1330-20-749,965 lbs33 lbs50,007 lbs
171,2,4-Trimethylbenzene95-63-640,441 lbs105 lbs40,549 lbs
18Certain glycol ethersN23037,104 lbs0 lbs37,104 lbs
19o-Toluidine95-53-429,521 lbs51 lbs30,113 lbs
20Isobutyraldehyde78-84-228,404 lbs0 lbs28,404 lbs
21Cyclohexane110-82-723,184 lbs51 lbs23,285 lbs
22Butyraldehyde123-72-823,130 lbs0 lbs23,130 lbs
23Zinc compoundsN98210,404 lbs6,866 lbs17,285 lbs
24Chloromethane74-87-315,422 lbs31 lbs15,478 lbs
25Boron trifluoride7637-07-214,843 lbs0 lbs14,843 lbs
26Chloroethane75-00-314,708 lbs41 lbs14,784 lbs
27Phenol108-95-213,534 lbs4 lbs13,538 lbs
28Diaminotoluene (mixed isomers)25376-45-812,695 lbs51 lbs12,797 lbs
29Chlorine7782-50-510,133 lbs0 lbs10,138 lbs
30Ethylbenzene100-41-47,232 lbs22 lbs7,256 lbs
31Aniline62-53-36,824 lbs25 lbs7,119 lbs
32Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
33n-Butyl alcohol71-36-34,032 lbs0 lbs4,032 lbs
34Phthalic anhydride85-44-93,545 lbs0 lbs3,545 lbs
35Formaldehyde50-00-03,345 lbs0 lbs3,345 lbs
36Biphenyl92-52-43,115 lbs15 lbs3,145 lbs
37Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
38Ethylene glycol107-21-12,118 lbs0 lbs2,118 lbs
39o-Cresol95-48-71,985 lbs0 lbs1,985 lbs
40Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
41Maleic anhydride108-31-61,686 lbs0 lbs1,686 lbs
42Formic acid64-18-61,406 lbs0 lbs1,406 lbs
43o-Xylene95-47-61,330 lbs0 lbs1,330 lbs
441,3-Butadiene106-99-01,064 lbs0 lbs1,064 lbs
45Manganese compoundsN4501,064 lbs0 lbs1,064 lbs
46Naphthalene91-20-31,013 lbs21 lbs1,035 lbs
47Lead compoundsN420291 lbs38 lbs330 lbs
48Manganese And Manganese CompoundsN450309 lbs0 lbs309 lbs
49Nickel7440-02-0120 lbs31 lbs151 lbs
501,2-Dibromoethane106-93-4133 lbs0 lbs133 lbs
511,2-Dichloroethane107-06-2127 lbs0 lbs127 lbs
52Diphenylamine122-39-4126 lbs0 lbs126 lbs
53Lead And Lead CompoundsN42056 lbs39 lbs96 lbs
54Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
55Chromium7440-47-340 lbs33 lbs73 lbs
56Manganese7439-96-570 lbs0 lbs70 lbs
57Lead7439-92-11 lbs13 lbs14 lbs
58Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
59Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
60Polycyclic aromatic compoundsN5902 lbs2 lbs4 lbs
61Hydrogen sulfide7783-06-41 lbs0 lbs1 lbs
62Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Ethylene, Nitrate compounds (water dissociable; reportable only when in aqueous solution), Propylene, Methanol, Cumene

View the full list of 51 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (51 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Ethylene74-85-1159,132 lbs0 lbs159,132 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs72,435 lbs72,435 lbs
3Propylene115-07-157,757 lbs0 lbs57,757 lbs
4Methanol67-56-119,060 lbs336 lbs46,187 lbs
5Cumene98-82-835,001 lbs0 lbs35,140 lbs
6n-Hexane110-54-320,460 lbs5 lbs20,476 lbs
7Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-020,007 lbs0 lbs20,007 lbs
8Benzene71-43-219,530 lbs2 lbs19,533 lbs
9Acetophenone98-86-217,719 lbs350 lbs18,069 lbs
10Aluminum (fume or dust)7429-90-513,724 lbs0 lbs13,724 lbs
11Vinyl chloride75-01-413,207 lbs1 lbs13,208 lbs
12Zinc compoundsN982678 lbs476 lbs9,871 lbs
13Ammonia7664-41-78,497 lbs0 lbs9,251 lbs
14Acetaldehyde75-07-08,345 lbs380 lbs8,725 lbs
15Phenol108-95-24,579 lbs0 lbs5,952 lbs
16Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
17Toluene108-88-33,102 lbs3 lbs4,948 lbs
181,2,4-Trimethylbenzene95-63-64,078 lbs0 lbs4,777 lbs
19Isobutyraldehyde78-84-24,431 lbs0 lbs4,431 lbs
20o-Toluidine95-53-44,008 lbs5 lbs4,018 lbs
21Xylene (mixed isomers)1330-20-73,767 lbs5 lbs3,912 lbs
22Formaldehyde50-00-0354 lbs0 lbs3,326 lbs
23Butyraldehyde123-72-82,507 lbs0 lbs2,507 lbs
24Cyclohexane110-82-72,312 lbs5 lbs2,322 lbs
25Chloroethane75-00-32,102 lbs5 lbs2,107 lbs
26Formic acid64-18-6189 lbs0 lbs1,968 lbs
27Chloromethane74-87-31,938 lbs5 lbs1,943 lbs
28Diaminotoluene (mixed isomers)25376-45-81,821 lbs5 lbs1,831 lbs
29Boron trifluoride7637-07-21,178 lbs0 lbs1,178 lbs
30o-Cresol95-48-788 lbs0 lbs1,122 lbs
31Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0901 lbs0 lbs1,095 lbs
32Dimethylamine124-40-3864 lbs0 lbs884 lbs
33n-Butyl alcohol71-36-3638 lbs0 lbs638 lbs
34Ethylene glycol107-21-1588 lbs0 lbs608 lbs
35Chlorine7782-50-5497 lbs0 lbs497 lbs
36Ethylbenzene100-41-4427 lbs3 lbs430 lbs
37Perfluorooctanoic acid335-67-10 lbs0 lbs402 lbs
381,3-Butadiene106-99-0295 lbs0 lbs295 lbs
39Acrylonitrile107-13-1278 lbs0 lbs294 lbs
40Maleic anhydride108-31-6132 lbs0 lbs281 lbs
41Propylene oxide75-56-9255 lbs0 lbs255 lbs
42Naphthalene91-20-3132 lbs1 lbs133 lbs
43Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-996 lbs0 lbs96 lbs
44Lead And Lead CompoundsN4208 lbs1 lbs70 lbs
45Chromium7440-47-325 lbs2 lbs33 lbs
46Nickel7440-02-024 lbs2 lbs30 lbs
47Manganese7439-96-530 lbs0 lbs30 lbs
48Diphenylamine122-39-423 lbs0 lbs23 lbs
491,2-Dibromoethane106-93-44 lbs0 lbs4 lbs
50Certain glycol ethersN2301 lbs0 lbs1 lbs
51Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs

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