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
1211 MAPLEWOOD LN PASADENA 77502
Building Size
1,857 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
High
Higher pollution than 88% 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)
4.12 million lbs
Extremely High
631.4x more than typical Houston property
≈ 206 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)
4.12 million lbs
Extremely High
853.6x 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)
3 thousand lbs
Very 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)4,119,613 lbs4,116,459 lbs3,154 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)421,356 lbs324,579 lbs200 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 88% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 10-19th percentile (top 15% most polluted).

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

Propylene, Hydrogen cyanide, Ammonia, n-Hexane, Ethylene

View the full list of 30 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (30 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Propylene115-07-1936,912 lbs0 lbs936,912 lbs
2Hydrogen cyanide74-90-8818,552 lbs0 lbs818,552 lbs
3Ammonia7664-41-7631,062 lbs0 lbs631,062 lbs
4n-Hexane110-54-3395,710 lbs0 lbs395,717 lbs
5Ethylene74-85-1292,319 lbs0 lbs292,319 lbs
6Xylene (mixed isomers)1330-20-7231,926 lbs627 lbs232,583 lbs
7Hydrogen sulfide7783-06-4206,443 lbs0 lbs206,443 lbs
8Benzene71-43-2205,652 lbs457 lbs206,120 lbs
9Toluene108-88-3169,716 lbs244 lbs169,984 lbs
10Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
11Cyclohexane110-82-752,501 lbs0 lbs52,510 lbs
12Ethylbenzene100-41-428,148 lbs63 lbs28,219 lbs
131,3-Butadiene106-99-021,614 lbs0 lbs21,614 lbs
14Ethylene glycol107-21-15,255 lbs0 lbs5,264 lbs
15Naphthalene91-20-34,762 lbs75 lbs4,845 lbs
16Polycyclic aromatic compoundsN5902,949 lbs526 lbs3,753 lbs
171,2,4-Trimethylbenzene95-63-63,713 lbs0 lbs3,727 lbs
18Methanol67-56-13,468 lbs0 lbs3,468 lbs
19Cumene98-82-81,656 lbs0 lbs1,658 lbs
20Styrene100-42-51,319 lbs0 lbs1,319 lbs
21Phenol108-95-20 lbs1,155 lbs1,155 lbs
22Biphenyl92-52-4345 lbs0 lbs364 lbs
23Certain glycol ethersN23080 lbs0 lbs80 lbs
24Mercury7439-97-677 lbs0 lbs77 lbs
25Isoprene78-79-560 lbs0 lbs60 lbs
26C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
27Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
28Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
29Benzo[g,h,i]perylene191-24-20 lbs7 lbs7 lbs
30Lead compoundsN4201 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Diethanolamine, Ammonia, Hydrogen cyanide, n-Hexane, Propylene

View the full list of 30 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (30 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Diethanolamine111-42-210,092 lbs0 lbs85,621 lbs
2Ammonia7664-41-773,883 lbs0 lbs82,157 lbs
3Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
4n-Hexane110-54-335,588 lbs0 lbs35,588 lbs
5Propylene115-07-133,225 lbs0 lbs33,225 lbs
6Xylene (mixed isomers)1330-20-726,894 lbs10 lbs26,920 lbs
7Ethylene74-85-116,725 lbs0 lbs16,725 lbs
8Benzene71-43-215,721 lbs110 lbs16,310 lbs
9Toluene108-88-316,108 lbs4 lbs16,165 lbs
10Hydrogen sulfide7783-06-413,422 lbs0 lbs13,422 lbs
11Ethylene glycol107-21-1500 lbs0 lbs7,519 lbs
12Cyclohexane110-82-74,048 lbs0 lbs4,048 lbs
13Phenol108-95-20 lbs8 lbs2,825 lbs
14Ethylbenzene100-41-42,726 lbs1 lbs2,734 lbs
15Certain glycol ethersN23010 lbs0 lbs1,121 lbs
16Nickel And Nickel CompoundsN4950 lbs0 lbs915 lbs
17Naphthalene91-20-3763 lbs7 lbs831 lbs
18Polycyclic aromatic compoundsN590360 lbs55 lbs427 lbs
191,2,4-Trimethylbenzene95-63-6305 lbs0 lbs308 lbs
20Cumene98-82-8293 lbs0 lbs293 lbs
21Lead compoundsN4200 lbs0 lbs269 lbs
22Styrene100-42-5110 lbs0 lbs110 lbs
23Biphenyl92-52-433 lbs0 lbs33 lbs
241,3-Butadiene106-99-028 lbs0 lbs28 lbs
25Isoprene78-79-58 lbs0 lbs8 lbs
26Lead7439-92-10 lbs0 lbs8 lbs
27Mercury7439-97-67 lbs0 lbs7 lbs
28Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
29Vanadium (except when contained in an alloy)7440-62-20 lbs0 lbs3 lbs
30Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs3 lbs

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