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
7817 SHERMAN ST HOUSTON 77012
Building Size
855 sqft
Total structure area from HCAD building records.
Elevation
28.81 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: 18.81 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 93% 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)
16.13 million lbs
Extremely High
2471.6x more than typical Houston property
≈ 806 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)
3.09 million lbs
Extremely High
641.6x 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)
13.03 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)16,125,578 lbs3,093,999 lbs13,031,579 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,940,983 lbs270,537 lbs2,052,729 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 93% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 0-9th percentile (top 10% most polluted).

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

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Ammonia, Zinc compounds

View the full list of 71 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (71 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs13,016,167 lbs13,016,167 lbs
2Hydrogen cyanide74-90-81,408,014 lbs0 lbs1,408,014 lbs
3Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9383,635 lbs0 lbs383,635 lbs
4Ammonia7664-41-7336,948 lbs8,000 lbs344,948 lbs
5Zinc compoundsN982176,619 lbs26 lbs176,645 lbs
6Xylene (mixed isomers)1330-20-7129,601 lbs0 lbs129,601 lbs
7Ozone10028-15-6115,228 lbs0 lbs115,228 lbs
8Toluene108-88-3102,312 lbs17 lbs102,329 lbs
9Cyclohexane110-82-780,271 lbs0 lbs80,271 lbs
10n-Hexane110-54-376,253 lbs0 lbs76,253 lbs
11Benzene71-43-260,181 lbs10 lbs60,191 lbs
12Propylene115-07-153,908 lbs0 lbs53,908 lbs
13Hydrogen sulfide7783-06-423,987 lbs3,527 lbs27,514 lbs
14Ethylbenzene100-41-420,678 lbs50 lbs20,729 lbs
151,2,4-Trimethylbenzene95-63-617,333 lbs0 lbs17,333 lbs
16Ethylene74-85-116,593 lbs0 lbs16,593 lbs
17Ethylene glycol107-21-114,690 lbs0 lbs14,690 lbs
181,4-Dioxane123-91-110,779 lbs0 lbs10,779 lbs
19Carbon disulfide75-15-08,908 lbs0 lbs8,908 lbs
201,3-Butadiene106-99-08,275 lbs0 lbs8,275 lbs
21Cyanide compoundsN1065,934 lbs45 lbs5,979 lbs
22Molybdenum trioxide1313-27-55,795 lbs0 lbs5,795 lbs
23Manganese7439-96-55,230 lbs357 lbs5,587 lbs
24Naphthalene91-20-34,546 lbs0 lbs4,547 lbs
25Phenol108-95-21,635 lbs1,804 lbs3,439 lbs
26Lead compoundsN4203,073 lbs6 lbs3,079 lbs
27Polycyclic aromatic compoundsN5902,356 lbs1 lbs2,365 lbs
28Styrene100-42-52,274 lbs0 lbs2,275 lbs
29Cumene98-82-82,256 lbs0 lbs2,256 lbs
30Copper compoundsN1002,021 lbs0 lbs2,021 lbs
31Phthalic anhydride85-44-92,000 lbs0 lbs2,000 lbs
32Lead And Lead CompoundsN4201,755 lbs16 lbs1,772 lbs
33Vinyl acetate108-05-41,608 lbs0 lbs1,608 lbs
34Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-01,460 lbs0 lbs1,460 lbs
35Carbonyl sulfide463-58-11,451 lbs0 lbs1,451 lbs
36Lead7439-92-1882 lbs385 lbs1,267 lbs
37Nickel compoundsN495664 lbs489 lbs1,153 lbs
38Acetaldehyde75-07-01,011 lbs0 lbs1,011 lbs
39Phenanthrene85-01-8937 lbs0 lbs937 lbs
40Methanol67-56-1932 lbs0 lbs932 lbs
41Vanadium compoundsN770144 lbs509 lbs653 lbs
421,1,1,2-Tetrachloroethane630-20-6434 lbs0 lbs434 lbs
43Nitric acid7697-37-2397 lbs0 lbs397 lbs
44Cresol (mixed isomers)1319-77-3232 lbs0 lbs232 lbs
45Nickel And Nickel CompoundsN49566 lbs123 lbs189 lbs
46Cobalt compoundsN096131 lbs24 lbs155 lbs
47Dimethylamine124-40-390 lbs0 lbs90 lbs
48Chromium compounds (except for chromite ore mined in the Transvaal Region)N09076 lbs0 lbs76 lbs
49Anthracene120-12-744 lbs0 lbs44 lbs
50Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
51Nickel7440-02-036 lbs4 lbs39 lbs
52Antimony compoundsN01038 lbs0 lbs38 lbs
53Mercury compoundsN45835 lbs1 lbs36 lbs
54Allyl alcohol107-18-634 lbs0 lbs34 lbs
55Benzo[g,h,i]perylene191-24-228 lbs0 lbs28 lbs
56tert-Butyl alcohol75-65-022 lbs0 lbs22 lbs
57Methoxone sodium salt3653-48-320 lbs0 lbs20 lbs
58Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09019 lbs0 lbs19 lbs
59Triethylamine121-44-817 lbs0 lbs17 lbs
60Chromium7440-47-33 lbs12 lbs15 lbs
61Acrolein107-02-813 lbs0 lbs13 lbs
62Mercury And Mercury CompoundsN45812 lbs0 lbs12 lbs
63Copper And Copper CompoundsN10010 lbs0 lbs10 lbs
64Hydroquinone123-31-99 lbs0 lbs9 lbs
65Copper7440-50-80 lbs6 lbs6 lbs
66Diaminotoluene (mixed isomers)25376-45-84 lbs0 lbs4 lbs
67Pyridine110-86-13 lbs0 lbs3 lbs
68Chloroethane75-00-32 lbs0 lbs2 lbs
69p-Cresol106-44-52 lbs0 lbs2 lbs
70Trichloroethylene79-01-61 lbs0 lbs1 lbs
712,4-Diaminotoluene95-80-71 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), 1,4-Dioxane, Ethylene glycol, Hydrogen cyanide, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 42 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (42 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs2,051,661 lbs2,051,661 lbs
21,4-Dioxane123-91-1328 lbs0 lbs396,851 lbs
3Ethylene glycol107-21-15,094 lbs0 lbs177,549 lbs
4Hydrogen cyanide74-90-8103,731 lbs0 lbs103,731 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-950,799 lbs0 lbs50,799 lbs
6Ammonia7664-41-728,219 lbs1,027 lbs29,363 lbs
7Ozone10028-15-625,701 lbs0 lbs25,701 lbs
8Methanol67-56-1152 lbs0 lbs23,827 lbs
9Zinc compoundsN9829,014 lbs0 lbs20,571 lbs
10Xylene (mixed isomers)1330-20-714,849 lbs0 lbs14,853 lbs
11Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0906 lbs0 lbs11,416 lbs
12Cyclohexane110-82-77,486 lbs0 lbs7,486 lbs
13Toluene108-88-36,118 lbs4 lbs6,133 lbs
14Benzene71-43-24,935 lbs4 lbs4,940 lbs
15Propylene115-07-13,529 lbs0 lbs3,529 lbs
16Lead And Lead CompoundsN420288 lbs7 lbs2,186 lbs
17Molybdenum trioxide1313-27-51,804 lbs0 lbs1,804 lbs
181,2,4-Trimethylbenzene95-63-61,449 lbs0 lbs1,449 lbs
19Ethylbenzene100-41-41,412 lbs4 lbs1,419 lbs
20Carbonyl sulfide463-58-11,041 lbs0 lbs1,041 lbs
211,3-Butadiene106-99-0734 lbs0 lbs734 lbs
22Hydrogen sulfide7783-06-4715 lbs0 lbs718 lbs
23Ethylene74-85-1620 lbs0 lbs620 lbs
24n-Hexane110-54-3607 lbs0 lbs607 lbs
25Carbon disulfide75-15-0484 lbs0 lbs484 lbs
26Naphthalene91-20-3241 lbs0 lbs258 lbs
27Cumene98-82-8241 lbs0 lbs241 lbs
28Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0221 lbs0 lbs221 lbs
291,1,1,2-Tetrachloroethane630-20-6212 lbs0 lbs212 lbs
30Phenol108-95-2164 lbs0 lbs184 lbs
31Styrene100-42-5159 lbs0 lbs159 lbs
32Polycyclic aromatic compoundsN59038 lbs0 lbs56 lbs
33Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
34Lead7439-92-120 lbs22 lbs42 lbs
35Phenanthrene85-01-836 lbs0 lbs36 lbs
36Dimethylamine124-40-323 lbs0 lbs23 lbs
37Anthracene120-12-71 lbs0 lbs14 lbs
38Mercury And Mercury CompoundsN4588 lbs0 lbs8 lbs
39Benzo[g,h,i]perylene191-24-28 lbs0 lbs8 lbs
40Vinyl acetate108-05-45 lbs0 lbs5 lbs
41Acetaldehyde75-07-01 lbs0 lbs1 lbs
42Cresol (mixed isomers)1319-77-31 lbs0 lbs1 lbs

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