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
719 GRANTHAM RD BAYTOWN 77521
Building Size
1,368 sqft
Total structure area from HCAD building records.
Elevation
17.66 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: 7.66 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 94% 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)
22.52 million lbs
Extremely High
3451.5x more than typical Houston property
≈ 1.1K 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)
18.92 million lbs
Extremely High
3924.1x 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)
3.6 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)22,518,863 lbs18,923,324 lbs3,595,539 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,078,355 lbs1,697,492 lbs359,878 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 94% 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):

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

View the full list of 54 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (54 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-93,351,765 lbs0 lbs3,351,765 lbs
2Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs3,023,800 lbs3,023,800 lbs
3Toluene108-88-32,636,000 lbs10,227 lbs2,646,693 lbs
4Methanol67-56-12,411,300 lbs204,900 lbs2,616,200 lbs
5Ammonia7664-41-72,141,097 lbs298,000 lbs2,439,097 lbs
6Hydrogen cyanide74-90-81,510,015 lbs440 lbs1,513,417 lbs
7Xylene (mixed isomers)1330-20-71,209,000 lbs14,977 lbs1,231,317 lbs
8Carbonyl sulfide463-58-1871,050 lbs0 lbs871,050 lbs
9n-Hexane110-54-3758,000 lbs0 lbs758,000 lbs
10Propylene115-07-1676,800 lbs0 lbs676,800 lbs
11Hydrogen sulfide7783-06-4558,565 lbs15 lbs558,580 lbs
12Ethylene74-85-1498,500 lbs0 lbs498,500 lbs
13Benzene71-43-2391,300 lbs1,555 lbs392,927 lbs
14Methyl isobutyl ketone108-10-1333,435 lbs140 lbs333,575 lbs
15Phenol108-95-2274,470 lbs8,282 lbs282,779 lbs
16Formaldehyde50-00-0210,020 lbs0 lbs210,020 lbs
17Naphthalene91-20-3189,480 lbs4,990 lbs194,656 lbs
18Ethylbenzene100-41-4149,300 lbs1,346 lbs152,557 lbs
191,3-Butadiene106-99-0134,000 lbs0 lbs134,000 lbs
20Phenanthrene85-01-8130,890 lbs0 lbs131,209 lbs
21Zinc compoundsN98235,100 lbs7,421 lbs92,006 lbs
22N-Methyl-2-pyrrolidone872-50-482,190 lbs0 lbs82,190 lbs
23Cyclohexane110-82-768,710 lbs940 lbs69,650 lbs
241,2,4-Trimethylbenzene95-63-650,101 lbs0 lbs50,101 lbs
25Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-038,144 lbs0 lbs38,144 lbs
26Nickel And Nickel CompoundsN49526,800 lbs3,670 lbs35,299 lbs
27Chlorodifluoromethane (HCFC-22)75-45-633,920 lbs0 lbs33,920 lbs
28Tetrachloroethylene127-18-428,600 lbs0 lbs28,600 lbs
29Styrene100-42-527,060 lbs0 lbs27,060 lbs
30Nickel compoundsN49514,500 lbs2,757 lbs22,180 lbs
31Chlorine7782-50-514,600 lbs6,700 lbs21,300 lbs
32Dicyclopentadiene77-73-620,090 lbs0 lbs20,090 lbs
33Cumene98-82-815,050 lbs240 lbs15,290 lbs
34Carbon disulfide75-15-014,311 lbs0 lbs14,311 lbs
35Chloromethane74-87-35,800 lbs0 lbs5,800 lbs
36Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0904,700 lbs450 lbs5,752 lbs
37Isoprene78-79-5101 lbs3,367 lbs3,468 lbs
38Lead And Lead CompoundsN4201,660 lbs334 lbs3,460 lbs
39Lead compoundsN420911 lbs617 lbs3,163 lbs
40Cyanide compoundsN1062,600 lbs222 lbs2,822 lbs
41Mercury And Mercury CompoundsN4581,100 lbs2 lbs1,105 lbs
42Copper compoundsN100640 lbs140 lbs909 lbs
43Mercury compoundsN458620 lbs7 lbs633 lbs
44Cobalt compoundsN096207 lbs0 lbs399 lbs
45Polycyclic aromatic compoundsN590229 lbs0 lbs355 lbs
46Anthracene120-12-7149 lbs0 lbs173 lbs
47Cobalt And Cobalt CompoundsN096121 lbs0 lbs143 lbs
48Dibutyl phthalate84-74-2120 lbs0 lbs120 lbs
49Vanadium compoundsN770102 lbs0 lbs102 lbs
50Benzo[g,h,i]perylene191-24-25 lbs0 lbs78 lbs
51Certain glycol ethersN23066 lbs0 lbs66 lbs
52Ethylene glycol107-21-124 lbs0 lbs24 lbs
53Dioxin and dioxin-like compoundsN1503 lbs0 lbs3 lbs
54Lead7439-92-11 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

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

View the full list of 38 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (38 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Toluene108-88-3465,000 lbs4,400 lbs469,452 lbs
2Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9303,433 lbs0 lbs303,433 lbs
3Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs300,000 lbs300,000 lbs
4Ammonia7664-41-7213,647 lbs21,000 lbs234,647 lbs
5Hydrogen cyanide74-90-8160,000 lbs120 lbs160,915 lbs
6Xylene (mixed isomers)1330-20-7127,000 lbs7,600 lbs135,407 lbs
7Carbonyl sulfide463-58-173,220 lbs0 lbs73,220 lbs
8n-Hexane110-54-361,000 lbs0 lbs61,000 lbs
9Methanol67-56-130,000 lbs24,000 lbs54,027 lbs
10Hydrogen sulfide7783-06-449,296 lbs0 lbs49,346 lbs
11Propylene115-07-145,000 lbs0 lbs45,000 lbs
12Benzene71-43-238,000 lbs460 lbs38,463 lbs
13Ethylene74-85-137,300 lbs0 lbs37,300 lbs
14Formaldehyde50-00-021,000 lbs0 lbs21,000 lbs
15Ethylbenzene100-41-415,800 lbs360 lbs16,369 lbs
16Vanadium compoundsN7701 lbs0 lbs15,801 lbs
171,3-Butadiene106-99-010,750 lbs0 lbs10,750 lbs
18Cyclohexane110-82-78,200 lbs340 lbs8,540 lbs
19N-Methyl-2-pyrrolidone872-50-48,300 lbs0 lbs8,300 lbs
20Nickel And Nickel CompoundsN4954,200 lbs510 lbs7,692 lbs
21Phenol108-95-24,780 lbs210 lbs4,994 lbs
22Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-03,525 lbs0 lbs3,525 lbs
23Naphthalene91-20-33,080 lbs390 lbs3,490 lbs
24Tetrachloroethylene127-18-43,400 lbs0 lbs3,400 lbs
25Styrene100-42-53,200 lbs0 lbs3,200 lbs
26Dicyclopentadiene77-73-61,800 lbs0 lbs1,800 lbs
27Cumene98-82-81,590 lbs66 lbs1,656 lbs
28Chlorine7782-50-51,400 lbs0 lbs1,400 lbs
29Chlorodifluoromethane (HCFC-22)75-45-61,200 lbs0 lbs1,200 lbs
301,2,4-Trimethylbenzene95-63-61,190 lbs0 lbs1,190 lbs
31Phenanthrene85-01-8490 lbs0 lbs525 lbs
32Lead And Lead CompoundsN420250 lbs32 lbs456 lbs
33Isoprene78-79-523 lbs390 lbs413 lbs
34Carbon disulfide75-15-0200 lbs0 lbs200 lbs
35Mercury And Mercury CompoundsN458170 lbs0 lbs171 lbs
36Polycyclic aromatic compoundsN59042 lbs0 lbs56 lbs
37Benzo[g,h,i]perylene191-24-20 lbs0 lbs8 lbs
38Anthracene120-12-74 lbs0 lbs7 lbs

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