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
4216 NORTHFIELD LN HOUSTON 77092
Building Size
1,964 sqft
Total structure area from HCAD building records.
Elevation
79 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: 69 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
Low
Lower pollution than 50% 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)
6 thousand lbs
Typical
1.0x less than typical Houston property
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)
6 thousand lbs
Typical
1.2x 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)
732 lbs
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)6,333 lbs5,602 lbs732 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)29,128 lbs434 lbs58 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%
Lower pollution than 50% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 50-59th percentile (average pollution).

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

Zinc compounds, Ammonia, Propylene, Certain glycol ethers, Chromium

View the full list of 17 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (17 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Zinc compoundsN9821,738 lbs405 lbs2,143 lbs
2Ammonia7664-41-71,500 lbs0 lbs1,500 lbs
3Propylene115-07-1975 lbs0 lbs975 lbs
4Certain glycol ethersN230565 lbs0 lbs565 lbs
5Chromium7440-47-3168 lbs132 lbs300 lbs
6Ethylene glycol107-21-1290 lbs0 lbs290 lbs
7Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N04022 lbs98 lbs232 lbs
8Chromium compounds (except for chromite ore mined in the Transvaal Region)N090120 lbs0 lbs120 lbs
9Nickel7440-02-036 lbs80 lbs116 lbs
10Manganese7439-96-570 lbs10 lbs79 lbs
11Hydrogen fluoride7664-39-350 lbs0 lbs50 lbs
12Lead compoundsN42032 lbs5 lbs42 lbs
13Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09030 lbs0 lbs30 lbs
14Mercury compoundsN4584 lbs0 lbs4 lbs
15Cobalt7440-48-42 lbs0 lbs2 lbs
16Lead7439-92-10 lbs1 lbs1 lbs
17Lead And Lead CompoundsN4201 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Zinc compounds, Lead compounds, Ammonia, Barium compounds (except for barium sulfate (CAS No. 7727-43-7)), Manganese

View the full list of 9 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (9 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Zinc compoundsN98299 lbs12 lbs28,381 lbs
2Lead compoundsN4205 lbs0 lbs313 lbs
3Ammonia7664-41-7250 lbs0 lbs250 lbs
4Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0406 lbs6 lbs72 lbs
5Manganese7439-96-558 lbs10 lbs68 lbs
6Chromium7440-47-36 lbs18 lbs24 lbs
7Nickel7440-02-07 lbs11 lbs18 lbs
8Cobalt7440-48-42 lbs0 lbs2 lbs
9Lead7439-92-10 lbs1 lbs1 lbs

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