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
521 MAPLE WAY HOUSTON 77015
Building Size
1,491 sqft
Total structure area from HCAD building records.
Elevation
21.07 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
Overall Risk
Moderate
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
Moderate
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: 11.07 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.

  • This property is in a high-risk flood zone. Flood insurance is required for mortgages.
  • Consider flood mitigation measures like elevated utilities and flood vents.
  • 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
Moderate
Higher pollution than 73% 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)
368 thousand lbs
Very High
56.4x more than typical Houston property
≈ 18 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)
349 thousand lbs
Very High
72.4x 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)
18 thousand 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)367,721 lbs349,241 lbs18,481 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)36,854 lbs25,381 lbs1,261 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 73% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile (top 25% most polluted).

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

m-Cresol, 2,4-Dimethylphenol, p-Cresol, o-Cresol, Phenol

View the full list of 39 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (39 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1m-Cresol108-39-445,935 lbs6,586 lbs5,666,444 lbs
22,4-Dimethylphenol105-67-913,055 lbs965 lbs4,229,319 lbs
3p-Cresol106-44-538,298 lbs3,292 lbs3,009,676 lbs
4o-Cresol95-48-725,461 lbs1,579 lbs1,765,196 lbs
5Phenol108-95-217,879 lbs3,104 lbs1,051,635 lbs
6Styrene100-42-559,223 lbs0 lbs59,223 lbs
7Hydrogen sulfide7783-06-431,339 lbs0 lbs31,339 lbs
8Carbon disulfide75-15-027,720 lbs0 lbs27,720 lbs
9Xylene (mixed isomers)1330-20-721,357 lbs0 lbs21,357 lbs
10Toluene108-88-313,120 lbs0 lbs13,696 lbs
11n-Hexane110-54-312,725 lbs0 lbs12,725 lbs
12Ethylbenzene100-41-410,531 lbs0 lbs10,531 lbs
13Methanol67-56-16,541 lbs0 lbs6,541 lbs
14Benzene71-43-26,362 lbs0 lbs6,362 lbs
15Ammonia7664-41-73,125 lbs0 lbs3,125 lbs
16Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-03,066 lbs0 lbs3,066 lbs
17Manganese7439-96-51,668 lbs543 lbs2,211 lbs
18Chromium7440-47-31,182 lbs925 lbs2,106 lbs
19Nickel7440-02-01,350 lbs544 lbs1,894 lbs
20Cyclohexane110-82-71,732 lbs0 lbs1,732 lbs
21Chlorine7782-50-51,412 lbs0 lbs1,412 lbs
22Manganese compoundsN450990 lbs262 lbs1,252 lbs
23Formic acid64-18-61,012 lbs0 lbs1,012 lbs
24Certain glycol ethersN230903 lbs0 lbs903 lbs
251,2,4-Trimethylbenzene95-63-6863 lbs0 lbs863 lbs
26Chromium compounds (except for chromite ore mined in the Transvaal Region)N090410 lbs417 lbs828 lbs
27Nickel compoundsN495443 lbs250 lbs694 lbs
28Ethylene glycol107-21-1398 lbs0 lbs398 lbs
29Cobalt7440-48-4250 lbs0 lbs250 lbs
30Copper7440-50-8250 lbs0 lbs250 lbs
31Aluminum (fume or dust)7429-90-5250 lbs0 lbs250 lbs
32Phthalic anhydride85-44-9184 lbs0 lbs184 lbs
33Maleic anhydride108-31-6139 lbs0 lbs139 lbs
34Naphthalene91-20-329 lbs0 lbs29 lbs
35Nitric acid7697-37-228 lbs0 lbs28 lbs
36Nonylphenol EthoxylatesN53510 lbs0 lbs10 lbs
37Lead And Lead CompoundsN4200 lbs7 lbs7 lbs
38Lead compoundsN4200 lbs6 lbs7 lbs
39Mercury7439-97-60 lbs0 lbs2 lbs

Top chemicals released near this property (2024 only):

m-Cresol, 2,4-Dimethylphenol, p-Cresol, o-Cresol, Phenol

View the full list of 16 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (16 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1m-Cresol108-39-45,580 lbs416 lbs7,579 lbs
22,4-Dimethylphenol105-67-91,591 lbs64 lbs7,241 lbs
3p-Cresol106-44-54,895 lbs208 lbs5,894 lbs
4o-Cresol95-48-73,192 lbs103 lbs3,937 lbs
5Phenol108-95-22,525 lbs151 lbs3,053 lbs
6Hydrogen sulfide7783-06-42,619 lbs0 lbs2,619 lbs
7Carbon disulfide75-15-01,835 lbs0 lbs2,484 lbs
8Methanol67-56-11,343 lbs0 lbs1,343 lbs
9Toluene108-88-3314 lbs0 lbs890 lbs
10Cyclohexane110-82-7759 lbs0 lbs759 lbs
11Manganese7439-96-5162 lbs86 lbs248 lbs
12Chromium7440-47-371 lbs144 lbs215 lbs
13Certain glycol ethersN230214 lbs0 lbs214 lbs
14Nickel7440-02-0108 lbs86 lbs202 lbs
15Formic acid64-18-6173 lbs0 lbs173 lbs
16Lead compoundsN4200 lbs3 lbs3 lbs

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