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
802 MARK ST DEER PARK 77536
Building Size
2,118 sqft
Total structure area from HCAD building records.
Elevation
26.1 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: 16.1 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 95% 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)
29.12 million lbs
Extremely High
4463.4x more than typical Houston property
≈ 1.5K 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)
16.19 million lbs
Extremely High
3357.6x 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)
12.93 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)29,120,757 lbs16,191,600 lbs12,929,157 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)3,664,314 lbs1,837,366 lbs759,526 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 95% 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), Ethylene, Propylene, Ammonia, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 107 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (107 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5117 lbs12,500,735 lbs12,500,742 lbs
2Ethylene74-85-12,978,199 lbs0 lbs2,978,199 lbs
3Propylene115-07-12,562,223 lbs0 lbs2,562,223 lbs
4Ammonia7664-41-71,188,807 lbs32,748 lbs1,643,035 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-91,081,942 lbs0 lbs1,081,942 lbs
61,3-Butadiene106-99-01,021,400 lbs45 lbs1,021,445 lbs
7Cumene98-82-8851,544 lbs882 lbs852,426 lbs
8Methanol67-56-1569,165 lbs133,638 lbs702,803 lbs
9n-Hexane110-54-3697,883 lbs10 lbs697,893 lbs
10Methyl methacrylate80-62-6656,896 lbs0 lbs656,896 lbs
11Phenol108-95-2634,156 lbs1,108 lbs635,264 lbs
12Toluene108-88-3520,715 lbs199 lbs520,914 lbs
13Benzene71-43-2434,346 lbs242 lbs434,588 lbs
14Hydrogen cyanide74-90-8413,524 lbs4,587 lbs418,111 lbs
15Xylene (mixed isomers)1330-20-7255,366 lbs179 lbs255,545 lbs
16Butyl acrylate141-32-2246,385 lbs0 lbs246,385 lbs
17Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0234,060 lbs0 lbs234,060 lbs
18Hydrogen sulfide7783-06-4211,383 lbs2,545 lbs213,928 lbs
19n-Butyl alcohol71-36-3196,351 lbs0 lbs196,351 lbs
20Vinyl chloride75-01-4166,484 lbs46 lbs166,529 lbs
21Acrylic acid79-10-7127,984 lbs0 lbs127,984 lbs
224,4'-Isopropylidenediphenol80-05-7125,700 lbs0 lbs125,700 lbs
231,2-Dichloroethane107-06-2125,688 lbs0 lbs125,688 lbs
24Epichlorohydrin106-89-8121,011 lbs3,811 lbs124,822 lbs
25Sodium nitrite7632-00-00 lbs102,300 lbs102,300 lbs
26Acetonitrile75-05-883,752 lbs12,219 lbs95,971 lbs
27Acetaldehyde75-07-083,747 lbs1,398 lbs85,145 lbs
28Ethylbenzene100-41-473,430 lbs222 lbs73,652 lbs
29Zinc compoundsN9827,165 lbs63,922 lbs71,088 lbs
30Isoprene78-79-570,540 lbs137 lbs70,677 lbs
31Propylene oxide75-56-953,747 lbs0 lbs53,747 lbs
32Formaldehyde50-00-044,351 lbs0 lbs44,351 lbs
33Ethylene glycol107-21-131,251 lbs9,387 lbs40,638 lbs
34Ethyl acrylate140-88-536,082 lbs0 lbs36,082 lbs
35Diethanolamine111-42-235,781 lbs0 lbs35,781 lbs
36Cyclohexane110-82-726,201 lbs284 lbs26,485 lbs
37Naphthalene91-20-321,426 lbs206 lbs21,632 lbs
38Dichloromethane75-09-219,581 lbs39 lbs19,620 lbs
39Methyl isobutyl ketone108-10-117,924 lbs2 lbs17,926 lbs
40Chlorobenzene108-90-716,113 lbs0 lbs16,113 lbs
41Copper compoundsN1000 lbs13,984 lbs13,984 lbs
42Chloroethane75-00-313,659 lbs0 lbs13,659 lbs
43Maleic anhydride108-31-612,243 lbs0 lbs12,243 lbs
44Chlorine7782-50-511,978 lbs0 lbs11,978 lbs
45Cumene hydroperoxide80-15-911,006 lbs0 lbs11,006 lbs
46Cyanide compoundsN1060 lbs9,834 lbs9,834 lbs
47Trade SecretTRD SECRT9,705 lbs0 lbs9,705 lbs
48Vinyl acetate108-05-49,003 lbs0 lbs9,003 lbs
491,2,4-Trimethylbenzene95-63-68,919 lbs0 lbs8,919 lbs
50Dicyclopentadiene77-73-68,670 lbs0 lbs8,670 lbs
512-Methyllactonitrile75-86-58,411 lbs0 lbs8,411 lbs
52Copper And Copper CompoundsN1001 lbs8,388 lbs8,389 lbs
53Acetophenone98-86-26,714 lbs1,462 lbs8,176 lbs
54Allyl alcohol107-18-67,427 lbs626 lbs8,053 lbs
55sec-Butyl alcohol78-92-21,946 lbs5,600 lbs7,546 lbs
56Glycidol556-52-52,841 lbs4,410 lbs7,251 lbs
57Acrylonitrile107-13-16,971 lbs0 lbs6,971 lbs
58Manganese compoundsN450137 lbs5,037 lbs5,174 lbs
59Styrene100-42-54,646 lbs16 lbs4,662 lbs
60Tetrachloroethylene127-18-44,241 lbs176 lbs4,417 lbs
61DiisocyanatesN1204,282 lbs0 lbs4,282 lbs
62Nickel compoundsN49580 lbs3,764 lbs3,844 lbs
63Formic acid64-18-62,328 lbs0 lbs2,328 lbs
64Certain glycol ethersN2301,969 lbs0 lbs1,969 lbs
65Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs1,936 lbs1,936 lbs
66Lead compoundsN420509 lbs1,376 lbs1,886 lbs
67Phenanthrene85-01-81,547 lbs159 lbs1,706 lbs
681,1,2-Trichloroethane79-00-51,537 lbs0 lbs1,537 lbs
69Nonylphenol EthoxylatesN5351,381 lbs0 lbs1,381 lbs
70Bis(2-chloroethyl) ether111-44-4950 lbs0 lbs950 lbs
71Polycyclic aromatic compoundsN590576 lbs130 lbs782 lbs
72Lead And Lead CompoundsN420267 lbs421 lbs689 lbs
73Chloroform67-66-3638 lbs0 lbs638 lbs
74Anthracene120-12-7534 lbs70 lbs604 lbs
75Trichloroethylene79-01-6603 lbs0 lbs603 lbs
76Cresol (mixed isomers)1319-77-3430 lbs146 lbs576 lbs
77Aluminum (fume or dust)7429-90-5462 lbs0 lbs462 lbs
78Hydroquinone123-31-9388 lbs0 lbs388 lbs
79Acrolein107-02-8326 lbs0 lbs326 lbs
80Chloromethane74-87-3326 lbs0 lbs326 lbs
81Pentachloroethane76-01-7323 lbs0 lbs323 lbs
82Mercury compoundsN458105 lbs212 lbs317 lbs
83Nitric acid7697-37-2309 lbs0 lbs309 lbs
84Mercury And Mercury CompoundsN45836 lbs195 lbs230 lbs
851,1,2,2-Tetrachloroethane79-34-5219 lbs0 lbs219 lbs
86Benzo[g,h,i]perylene191-24-296 lbs74 lbs170 lbs
87Cobalt compoundsN09633 lbs89 lbs122 lbs
88Barium And Barium CompoundsN0400 lbs99 lbs99 lbs
89Carbon disulfide75-15-084 lbs0 lbs84 lbs
901,2-Dichloroethylene540-59-075 lbs0 lbs75 lbs
91NonylphenolN53061 lbs0 lbs61 lbs
92Chloroprene126-99-855 lbs0 lbs55 lbs
93Methyl acrylate96-33-347 lbs0 lbs47 lbs
94Ethylidene dichloride75-34-337 lbs0 lbs37 lbs
95Cobalt And Cobalt CompoundsN09612 lbs24 lbs36 lbs
96Triethylamine121-44-834 lbs0 lbs34 lbs
97Dioxin and dioxin-like compoundsN1508 lbs23 lbs31 lbs
98Carbon tetrachloride56-23-527 lbs0 lbs27 lbs
99Diphenylamine122-39-410 lbs14 lbs24 lbs
100Hexachloroethane67-72-116 lbs0 lbs16 lbs
101Vinylidene chloride75-35-415 lbs0 lbs15 lbs
102Boron trifluoride7637-07-211 lbs0 lbs11 lbs
103Propionaldehyde123-38-68 lbs0 lbs8 lbs
104trans-1,4-Dichloro-2-butene110-57-67 lbs0 lbs7 lbs
105Hexachlorobenzene118-74-15 lbs0 lbs5 lbs
106N-Methyl-2-pyrrolidone872-50-43 lbs0 lbs3 lbs
107Acetamide60-35-52 lbs0 lbs2 lbs

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Ammonia, Methyl methacrylate, Propylene

View the full list of 90 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (90 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs700,421 lbs700,421 lbs
2Ethylene74-85-1629,568 lbs0 lbs629,568 lbs
3Ammonia7664-41-785,326 lbs3,383 lbs526,667 lbs
4Methyl methacrylate80-62-660,017 lbs0 lbs414,676 lbs
5Propylene115-07-1300,463 lbs0 lbs300,463 lbs
6Methanol67-56-139,519 lbs27,174 lbs136,864 lbs
71,3-Butadiene106-99-0108,643 lbs9 lbs108,652 lbs
8Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-997,000 lbs0 lbs97,000 lbs
94,4'-Isopropylidenediphenol80-05-710,300 lbs0 lbs89,800 lbs
10Butyl acrylate141-32-224,361 lbs0 lbs81,487 lbs
11n-Hexane110-54-365,206 lbs10 lbs66,558 lbs
12Toluene108-88-352,898 lbs10 lbs55,253 lbs
13Cumene98-82-852,712 lbs31 lbs52,743 lbs
14Phenol108-95-240,343 lbs254 lbs42,761 lbs
15Benzene71-43-239,601 lbs7 lbs41,770 lbs
16Hydrogen sulfide7783-06-438,758 lbs289 lbs39,047 lbs
17n-Butyl alcohol71-36-330,561 lbs0 lbs30,561 lbs
18Hydrogen cyanide74-90-825,157 lbs70 lbs30,477 lbs
19Xylene (mixed isomers)1330-20-718,400 lbs10 lbs20,108 lbs
20Zinc compoundsN982443 lbs9,562 lbs18,421 lbs
21Diethanolamine111-42-23,059 lbs0 lbs12,859 lbs
22Lead compoundsN42093 lbs169 lbs12,855 lbs
23Epichlorohydrin106-89-812,291 lbs331 lbs12,622 lbs
24Nickel compoundsN4950 lbs218 lbs11,929 lbs
25Vinyl chloride75-01-411,013 lbs3 lbs11,016 lbs
26Acrylic acid79-10-79,951 lbs0 lbs9,951 lbs
27Dichloromethane75-09-29,911 lbs10 lbs9,922 lbs
28Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-09,252 lbs0 lbs9,252 lbs
291,2-Dichloroethane107-06-28,530 lbs0 lbs8,530 lbs
30Acetonitrile75-05-84,900 lbs3,100 lbs8,000 lbs
31Trade SecretTRD SECRT5,677 lbs0 lbs5,677 lbs
32Acetaldehyde75-07-05,348 lbs161 lbs5,590 lbs
33Ethyl acrylate140-88-53,769 lbs0 lbs5,572 lbs
34Ethylbenzene100-41-44,620 lbs7 lbs5,262 lbs
35Formaldehyde50-00-04,831 lbs0 lbs4,831 lbs
36Sodium nitrite7632-00-00 lbs4,600 lbs4,600 lbs
37Naphthalene91-20-32,290 lbs22 lbs4,044 lbs
38Polycyclic aromatic compoundsN59012 lbs14 lbs4,011 lbs
39Copper And Copper CompoundsN1000 lbs3,809 lbs3,832 lbs
40Glycidol556-52-51,002 lbs2,400 lbs3,402 lbs
41Cyclohexane110-82-72,424 lbs17 lbs3,336 lbs
42sec-Butyl alcohol78-92-2540 lbs2,100 lbs2,640 lbs
43Methyl isobutyl ketone108-10-12,468 lbs0 lbs2,512 lbs
44Isoprene78-79-52,360 lbs16 lbs2,376 lbs
45DiisocyanatesN1201,843 lbs0 lbs1,843 lbs
46Acrylonitrile107-13-11,776 lbs0 lbs1,776 lbs
47Ethylene glycol107-21-11,527 lbs0 lbs1,527 lbs
48Styrene100-42-51,183 lbs2 lbs1,503 lbs
49Chloroethane75-00-31,450 lbs0 lbs1,450 lbs
502-Methyllactonitrile75-86-5998 lbs0 lbs998 lbs
51Vinyl acetate108-05-4766 lbs0 lbs839 lbs
52Maleic anhydride108-31-6701 lbs0 lbs701 lbs
53Acetophenone98-86-2188 lbs510 lbs698 lbs
541,2,4-Trimethylbenzene95-63-6546 lbs0 lbs546 lbs
55Dicyclopentadiene77-73-6493 lbs0 lbs503 lbs
56Cyanide compoundsN1060 lbs396 lbs418 lbs
57Manganese compoundsN45037 lbs350 lbs387 lbs
58Cumene hydroperoxide80-15-9384 lbs0 lbs384 lbs
59NonylphenolN5302 lbs0 lbs374 lbs
60Benzo[g,h,i]perylene191-24-20 lbs1 lbs372 lbs
61Certain glycol ethersN230326 lbs0 lbs326 lbs
62Chlorine7782-50-5311 lbs0 lbs311 lbs
63Formic acid64-18-6291 lbs0 lbs291 lbs
64Tetrachloroethylene127-18-4282 lbs4 lbs286 lbs
651,1,2-Trichloroethane79-00-5166 lbs0 lbs166 lbs
66Bis(2-chloroethyl) ether111-44-496 lbs0 lbs96 lbs
67Hydroquinone123-31-984 lbs0 lbs84 lbs
68Vanadium compoundsN7700 lbs0 lbs56 lbs
69Mercury compoundsN4580 lbs53 lbs54 lbs
70Dioxin and dioxin-like compoundsN1501 lbs0 lbs53 lbs
71Chloroform67-66-344 lbs0 lbs44 lbs
72Trichloroethylene79-01-643 lbs0 lbs43 lbs
73Lead7439-92-10 lbs0 lbs38 lbs
74Pentachloroethane76-01-736 lbs0 lbs36 lbs
75Mercury And Mercury CompoundsN45817 lbs0 lbs32 lbs
76Nitric acid7697-37-231 lbs0 lbs31 lbs
77Acrolein107-02-827 lbs0 lbs27 lbs
78Aluminum (fume or dust)7429-90-526 lbs0 lbs26 lbs
791,1,2,2-Tetrachloroethane79-34-524 lbs0 lbs24 lbs
80Chlorobenzene108-90-714 lbs0 lbs14 lbs
81Carbon disulfide75-15-012 lbs0 lbs12 lbs
82Phenanthrene85-01-86 lbs1 lbs7 lbs
831,2-Dichloroethylene540-59-05 lbs0 lbs5 lbs
84Carbon tetrachloride56-23-54 lbs0 lbs4 lbs
85Chloroprene126-99-83 lbs0 lbs3 lbs
86Hexachloroethane67-72-12 lbs0 lbs2 lbs
87Anthracene120-12-71 lbs1 lbs2 lbs
88Ethylidene dichloride75-34-31 lbs0 lbs1 lbs
89Propylene oxide75-56-91 lbs0 lbs1 lbs
90Hexachlorobenzene118-74-11 lbs0 lbs1 lbs

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