Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 502 S Main St, Galena Park, TX 77547

HCAD #0381020410002
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🌍Environmental Assessment

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.

🌊Flood Risk Analysis
FEMA Zone X
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
502 S Main St, Galena Park, TX 77547
Elevation
25.16 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very High
Property flooded at 9.84ft depth.
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 High
Flood Depth
9.84 ft±0.5 ft
Depth of water above ground level.
Water Surface Elevation (WSE)
35.01 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
185.7 acres
63.0% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$2,827,602
Vacant lot (no building data).
Depth-Damage (Neighborhood)
$0
Vacant lot (no building data).
Analysis Method
COG Combined 5000 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 Flooded
Flood Depth: 9.84 feet
Severity
Severe
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.

#1
Minimal flood hazard area - property outside mapped high-risk zones
#2
Flood insurance available at preferred rates - over 25% of claims occur in low-risk areas
#3
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#4
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
5.5th percentile
Property Pollution Ranking
Very High
Higher pollution than 95% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
24.88 millionlbs
Extremely High
3814.0x more than typical Houston property
≈ 1.2K dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
11.78 millionlbs
Extremely High
2443.5x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
13.1 millionlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
21
Industrial facilities within 2 miles
💡
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)24,883,724 lbs11,783,215 lbs13,100,509 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,843,563 lbs788,985 lbs2,053,729 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 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), Hydrogen cyanide, Styrene, Ammonia, Propylene
View the full list of 80 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(80 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs13,038,121 lbs13,038,121 lbs
2Hydrogen cyanide74-90-82,440,300 lbs0 lbs2,440,300 lbs
3Styrene100-42-51,727,081 lbs7,271 lbs1,734,352 lbs
4Ammonia7664-41-71,525,694 lbs34,223 lbs1,559,916 lbs
5Propylene115-07-11,262,932 lbs0 lbs1,262,932 lbs
6n-Hexane110-54-31,182,567 lbs9 lbs1,183,066 lbs
7Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9633,748 lbs0 lbs633,748 lbs
8Xylene (mixed isomers)1330-20-7506,726 lbs741 lbs509,897 lbs
9Toluene108-88-3388,513 lbs294 lbs389,775 lbs
10Ethylene74-85-1387,367 lbs0 lbs387,367 lbs
11Benzene71-43-2359,192 lbs496 lbs360,271 lbs
12Hydrogen sulfide7783-06-4268,202 lbs3,527 lbs271,730 lbs
131,3-Butadiene106-99-0234,452 lbs1 lbs234,453 lbs
14Cyclohexane110-82-7146,851 lbs0 lbs147,620 lbs
15n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
16Ozone10028-15-6115,228 lbs0 lbs115,228 lbs
17Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
18Ethylbenzene100-41-481,738 lbs168 lbs82,543 lbs
19Methanol67-56-164,581 lbs0 lbs64,581 lbs
201,2,4-Trimethylbenzene95-63-631,181 lbs0 lbs31,670 lbs
21Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
22Naphthalene91-20-324,577 lbs75 lbs25,987 lbs
23Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
24Ethylene glycol107-21-119,945 lbs0 lbs19,954 lbs
25Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
26Cumene98-82-811,194 lbs0 lbs11,383 lbs
271,4-Dioxane123-91-110,779 lbs0 lbs10,779 lbs
28Sodium nitrite7632-00-00 lbs9,470 lbs9,470 lbs
29Carbon disulfide75-15-08,908 lbs0 lbs8,908 lbs
30Cyanide compoundsN1065,934 lbs45 lbs5,979 lbs
31Molybdenum trioxide1313-27-55,795 lbs0 lbs5,795 lbs
32Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
33Polycyclic aromatic compoundsN5904,543 lbs525 lbs5,269 lbs
34Phenol108-95-21,635 lbs2,959 lbs4,594 lbs
35Manganese7439-96-54,228 lbs0 lbs4,228 lbs
36Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
37Zinc compoundsN982219 lbs1,181 lbs2,891 lbs
38Phthalic anhydride85-44-92,000 lbs0 lbs2,000 lbs
39Vinyl acetate108-05-41,608 lbs0 lbs1,608 lbs
40Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-01,460 lbs0 lbs1,460 lbs
41Carbonyl sulfide463-58-11,451 lbs0 lbs1,451 lbs
42Nickel compoundsN495654 lbs489 lbs1,143 lbs
43Acetaldehyde75-07-01,011 lbs0 lbs1,011 lbs
44Phenanthrene85-01-8937 lbs0 lbs937 lbs
45Lead7439-92-1657 lbs170 lbs828 lbs
46Vanadium compoundsN770144 lbs509 lbs653 lbs
471,1,1,2-Tetrachloroethane630-20-6434 lbs0 lbs434 lbs
48Chlorine7782-50-5388 lbs0 lbs388 lbs
49Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
50Cresol (mixed isomers)1319-77-3232 lbs0 lbs232 lbs
51Lead And Lead CompoundsN420204 lbs22 lbs227 lbs
52Mercury compoundsN458200 lbs2 lbs203 lbs
53Nickel And Nickel CompoundsN49566 lbs123 lbs189 lbs
54Cobalt compoundsN096131 lbs24 lbs155 lbs
55Mercury And Mercury CompoundsN458109 lbs0 lbs109 lbs
56Lead compoundsN42050 lbs57 lbs107 lbs
57Mercury7439-97-6106 lbs0 lbs106 lbs
58Dimethylamine124-40-390 lbs0 lbs90 lbs
59Certain glycol ethersN23080 lbs0 lbs80 lbs
60Anthracene120-12-775 lbs0 lbs75 lbs
61Isoprene78-79-560 lbs0 lbs60 lbs
62Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
63C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
64Antimony compoundsN01038 lbs0 lbs38 lbs
65Nickel7440-02-035 lbs0 lbs35 lbs
66Allyl alcohol107-18-634 lbs0 lbs34 lbs
67Benzo[g,h,i]perylene191-24-216 lbs7 lbs24 lbs
68tert-Butyl alcohol75-65-022 lbs0 lbs22 lbs
69Methoxone sodium salt3653-48-320 lbs0 lbs20 lbs
70Triethylamine121-44-817 lbs0 lbs17 lbs
71Acrolein107-02-813 lbs0 lbs13 lbs
72Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
73Hydroquinone123-31-99 lbs0 lbs9 lbs
74Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
75Diaminotoluene (mixed isomers)25376-45-84 lbs0 lbs4 lbs
76Pyridine110-86-13 lbs0 lbs3 lbs
77Chloroethane75-00-32 lbs0 lbs2 lbs
78p-Cresol106-44-52 lbs0 lbs2 lbs
79Trichloroethylene79-01-61 lbs0 lbs1 lbs
802,4-Diaminotoluene95-80-71 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Ammonia, Styrene, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
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)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs2,051,661 lbs2,051,661 lbs
2Hydrogen cyanide74-90-8177,459 lbs0 lbs177,459 lbs
3Ammonia7664-41-7139,903 lbs1,105 lbs141,007 lbs
4Styrene100-42-5130,944 lbs291 lbs131,236 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
6n-Hexane110-54-343,068 lbs0 lbs43,172 lbs
7Xylene (mixed isomers)1330-20-739,577 lbs28 lbs39,888 lbs
8Propylene115-07-137,873 lbs0 lbs37,873 lbs
9Toluene108-88-327,802 lbs18 lbs27,925 lbs
10Ozone10028-15-625,701 lbs0 lbs25,701 lbs
11Benzene71-43-225,261 lbs118 lbs25,410 lbs
12Ethylene74-85-117,866 lbs0 lbs17,866 lbs
13Hydrogen sulfide7783-06-415,060 lbs0 lbs15,060 lbs
141,3-Butadiene106-99-014,425 lbs0 lbs14,425 lbs
15Cyclohexane110-82-711,657 lbs0 lbs11,675 lbs
16Diethanolamine111-42-210,092 lbs0 lbs10,092 lbs
17Ethylbenzene100-41-45,524 lbs17 lbs5,611 lbs
18Ethylene glycol107-21-15,594 lbs0 lbs5,594 lbs
191,2,4-Trimethylbenzene95-63-62,830 lbs0 lbs3,039 lbs
20Molybdenum trioxide1313-27-51,804 lbs0 lbs1,804 lbs
21Naphthalene91-20-31,611 lbs7 lbs1,641 lbs
22Carbonyl sulfide463-58-11,041 lbs0 lbs1,041 lbs
23Cumene98-82-8797 lbs0 lbs803 lbs
24Carbon disulfide75-15-0484 lbs0 lbs484 lbs
25Polycyclic aromatic compoundsN590355 lbs55 lbs410 lbs
26Sodium nitrite7632-00-00 lbs371 lbs371 lbs
271,4-Dioxane123-91-1328 lbs0 lbs328 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 lbs8 lbs172 lbs
31Methanol67-56-1152 lbs0 lbs152 lbs
32Lead And Lead CompoundsN420128 lbs12 lbs140 lbs
33Zinc compoundsN98222 lbs32 lbs54 lbs
34Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
35Phenanthrene85-01-836 lbs0 lbs36 lbs
36Biphenyl92-52-433 lbs0 lbs33 lbs
37Mercury And Mercury CompoundsN45829 lbs0 lbs30 lbs
38Chlorine7782-50-525 lbs0 lbs25 lbs
39Dimethylamine124-40-323 lbs0 lbs23 lbs
40Benzo[g,h,i]perylene191-24-28 lbs5 lbs13 lbs
41Certain glycol ethersN23010 lbs0 lbs10 lbs
42Isoprene78-79-58 lbs0 lbs8 lbs
43Mercury7439-97-67 lbs0 lbs7 lbs
44Vinyl acetate108-05-45 lbs0 lbs5 lbs
45Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs2 lbs
46Acetaldehyde75-07-01 lbs0 lbs1 lbs
47Anthracene120-12-71 lbs0 lbs1 lbs
48Cresol (mixed isomers)1319-77-31 lbs0 lbs1 lbs
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