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
1504 HOLLAND AVE GALENA PARK 77547
Building Size
794 sqft
Total structure area from HCAD building records.
Elevation
24.91 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: 14.91 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)
18.32 million lbs
Extremely High
2808.2x more than typical Houston property
≈ 916 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)
5.29 million lbs
Extremely High
1096.8x 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)18,321,352 lbs5,288,969 lbs13,032,383 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,361,137 lbs285,947 lbs2,052,784 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, n-Hexane, Ammonia, Propylene

View the full list of 56 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (56 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 cyanide74-90-81,621,748 lbs0 lbs1,621,748 lbs
3n-Hexane110-54-3836,254 lbs9 lbs836,746 lbs
4Ammonia7664-41-7373,033 lbs8,000 lbs381,033 lbs
5Propylene115-07-1325,919 lbs0 lbs325,919 lbs
6Xylene (mixed isomers)1330-20-7276,297 lbs114 lbs278,812 lbs
7Ethylene74-85-1260,502 lbs0 lbs260,502 lbs
8Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9256,810 lbs0 lbs256,810 lbs
91,3-Butadiene106-99-0240,363 lbs0 lbs240,363 lbs
10Toluene108-88-3221,552 lbs50 lbs222,546 lbs
11Benzene71-43-2154,212 lbs39 lbs154,823 lbs
12n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
13Ozone10028-15-6115,228 lbs0 lbs115,228 lbs
14Cyclohexane110-82-7109,006 lbs0 lbs109,766 lbs
15Methanol67-56-165,857 lbs0 lbs65,857 lbs
16Hydrogen sulfide7783-06-455,453 lbs3,527 lbs58,981 lbs
17Ethylbenzene100-41-453,764 lbs105 lbs54,498 lbs
18Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
191,2,4-Trimethylbenzene95-63-627,468 lbs0 lbs27,943 lbs
20Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
21Naphthalene91-20-319,815 lbs0 lbs21,142 lbs
22Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
23Isoprene78-79-513,272 lbs0 lbs13,272 lbs
24Cumene98-82-89,538 lbs0 lbs9,725 lbs
25Carbon disulfide75-15-08,557 lbs0 lbs8,557 lbs
26Cyanide compoundsN1065,934 lbs45 lbs5,979 lbs
27Molybdenum trioxide1313-27-55,795 lbs0 lbs5,795 lbs
28Biphenyl92-52-44,816 lbs0 lbs5,138 lbs
29Manganese7439-96-54,228 lbs0 lbs4,228 lbs
30Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
31Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-03,527 lbs0 lbs3,527 lbs
32Phenol108-95-21,635 lbs1,804 lbs3,439 lbs
33Zinc compoundsN982219 lbs1,181 lbs2,891 lbs
34Styrene100-42-52,112 lbs0 lbs2,112 lbs
35Polycyclic aromatic compoundsN5901,678 lbs0 lbs1,678 lbs
36Carbonyl sulfide463-58-11,451 lbs0 lbs1,451 lbs
37Nickel compoundsN495654 lbs489 lbs1,143 lbs
38Phenanthrene85-01-8937 lbs0 lbs937 lbs
39Lead7439-92-1489 lbs127 lbs616 lbs
40Vanadium compoundsN77079 lbs509 lbs588 lbs
41Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
42Chlorine7782-50-5268 lbs0 lbs268 lbs
43Cresol (mixed isomers)1319-77-3232 lbs0 lbs232 lbs
44Mercury compoundsN458197 lbs1 lbs199 lbs
45Nickel And Nickel CompoundsN49566 lbs123 lbs189 lbs
46Cobalt compoundsN096131 lbs24 lbs155 lbs
47Lead And Lead CompoundsN420142 lbs12 lbs154 lbs
48Mercury And Mercury CompoundsN458109 lbs0 lbs109 lbs
49Lead compoundsN42049 lbs57 lbs106 lbs
50Anthracene120-12-775 lbs0 lbs75 lbs
51Mercury7439-97-642 lbs0 lbs42 lbs
52Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
53Antimony compoundsN01038 lbs0 lbs38 lbs
54Nickel7440-02-035 lbs0 lbs35 lbs
55Benzo[g,h,i]perylene191-24-216 lbs0 lbs16 lbs
56tert-Butyl alcohol75-65-07 lbs0 lbs7 lbs

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Ammonia, 1,3-Butadiene, Ozone

View the full list of 36 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (36 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 cyanide74-90-8103,731 lbs0 lbs103,731 lbs
3Ammonia7664-41-736,263 lbs1,027 lbs37,440 lbs
41,3-Butadiene106-99-034,065 lbs0 lbs34,065 lbs
5Ozone10028-15-625,701 lbs0 lbs25,701 lbs
6Zinc compoundsN98222 lbs32 lbs19,978 lbs
7Ethylene74-85-115,607 lbs0 lbs15,607 lbs
8Xylene (mixed isomers)1330-20-712,683 lbs18 lbs13,082 lbs
9Toluene108-88-311,694 lbs14 lbs11,855 lbs
10n-Hexane110-54-39,830 lbs0 lbs9,934 lbs
11Benzene71-43-29,645 lbs8 lbs9,768 lbs
12Cyclohexane110-82-77,903 lbs0 lbs7,921 lbs
13Propylene115-07-14,731 lbs0 lbs4,731 lbs
14Ethylbenzene100-41-42,798 lbs16 lbs2,892 lbs
151,2,4-Trimethylbenzene95-63-62,525 lbs0 lbs2,734 lbs
16Isoprene78-79-52,371 lbs0 lbs2,371 lbs
17Molybdenum trioxide1313-27-51,804 lbs0 lbs1,804 lbs
18Lead And Lead CompoundsN42096 lbs7 lbs1,291 lbs
19Hydrogen sulfide7783-06-41,046 lbs0 lbs1,049 lbs
20Carbonyl sulfide463-58-11,041 lbs0 lbs1,041 lbs
21Naphthalene91-20-3848 lbs0 lbs889 lbs
22Cumene98-82-8504 lbs0 lbs510 lbs
23Carbon disulfide75-15-0243 lbs0 lbs243 lbs
24Lead7439-92-1228 lbs1 lbs234 lbs
25Phenol108-95-2164 lbs0 lbs184 lbs
26Styrene100-42-5159 lbs0 lbs159 lbs
27Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9101 lbs0 lbs101 lbs
28Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
29Phenanthrene85-01-836 lbs0 lbs36 lbs
30Mercury And Mercury CompoundsN45829 lbs0 lbs31 lbs
31Chlorine7782-50-525 lbs0 lbs25 lbs
32Anthracene120-12-71 lbs0 lbs14 lbs
33Benzo[g,h,i]perylene191-24-28 lbs0 lbs8 lbs
34Methanol67-56-10 lbs0 lbs2 lbs
35Polycyclic aromatic compoundsN5901 lbs0 lbs1 lbs
36Cresol (mixed isomers)1319-77-31 lbs0 lbs1 lbs

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