Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 1809 Harlem St, Houston, TX 77020

HCAD #0131340000010
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🌍Environmental Assessment

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.

🌊Flood Risk Analysis
FEMA Zone X
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
1809 Harlem St, Houston, TX 77020
Elevation
44.66 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
48.0 acres
16.3% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$0
Vacant lot (no building data).
Depth-Damage (Neighborhood)
$0
Vacant lot (no building data).
Analysis Method
COG Combined 5000 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: 0 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.

#1
Minimal flood hazard area - property outside mapped high-risk zones
#2
Flood insurance available at preferred rates - over 25% of claims occur in low-risk areas
#3
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#4
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
25.5th percentile
Property Pollution Ranking
Moderate
Higher pollution than 75% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
466 thousandlbs
Very High
71.4x more than typical Houston property
≈ 23 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
465 thousandlbs
Very High
96.4x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
826lbs
High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
19
Industrial facilities within 2 miles
💡
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)465,670 lbs464,844 lbs826 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)50,778 lbs50,379 lbs399 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 75% 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 chemicals released near this property (past 10 years):
Xylene (mixed isomers), n-Hexane, Styrene, n-Butyl alcohol, Toluene
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)
1Xylene (mixed isomers)1330-20-7141,882 lbs0 lbs141,882 lbs
2n-Hexane110-54-3125,640 lbs0 lbs125,640 lbs
3Styrene100-42-572,717 lbs0 lbs72,717 lbs
4n-Butyl alcohol71-36-333,617 lbs0 lbs33,617 lbs
5Toluene108-88-325,336 lbs0 lbs26,509 lbs
6Phenol108-95-223,252 lbs0 lbs23,252 lbs
7Ethylbenzene100-41-416,163 lbs0 lbs16,163 lbs
81,2,4-Trimethylbenzene95-63-68,965 lbs0 lbs8,965 lbs
9Ammonia7664-41-73,770 lbs0 lbs3,770 lbs
10Methyl isobutyl ketone108-10-13,355 lbs0 lbs3,355 lbs
11Cyclohexane110-82-72,389 lbs0 lbs2,389 lbs
12Formaldehyde50-00-01,893 lbs0 lbs1,893 lbs
13Methanol67-56-11,849 lbs0 lbs1,849 lbs
14Ethylene glycol107-21-11,461 lbs0 lbs1,461 lbs
15Methyl tert-butyl ether1634-04-41,021 lbs0 lbs1,021 lbs
16Propylene115-07-1810 lbs0 lbs810 lbs
17Zinc compoundsN98239 lbs419 lbs458 lbs
18Benzene71-43-2218 lbs0 lbs218 lbs
19Manganese compoundsN4502 lbs208 lbs210 lbs
20Zinc (fume or dust)7440-66-6192 lbs0 lbs192 lbs
21Lead compoundsN42092 lbs54 lbs146 lbs
22Lead7439-92-184 lbs45 lbs129 lbs
23Aluminum oxide (fibrous forms)1344-28-11 lbs98 lbs99 lbs
24Naphthalene91-20-332 lbs0 lbs32 lbs
25Polycyclic aromatic compoundsN59026 lbs0 lbs26 lbs
26Nickel7440-02-020 lbs0 lbs20 lbs
27Chromium7440-47-316 lbs0 lbs20 lbs
28Cobalt7440-48-40 lbs0 lbs4 lbs
29Manganese7439-96-50 lbs2 lbs2 lbs
30Cumene98-82-81 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Xylene (mixed isomers), n-Hexane, Toluene, Styrene, 1,2,4-Trimethylbenzene
View the full list of 12 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(12 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Xylene (mixed isomers)1330-20-717,453 lbs0 lbs17,453 lbs
2n-Hexane110-54-312,290 lbs0 lbs12,290 lbs
3Toluene108-88-311,886 lbs0 lbs11,886 lbs
4Styrene100-42-57,400 lbs0 lbs7,400 lbs
51,2,4-Trimethylbenzene95-63-61,210 lbs0 lbs1,210 lbs
6Zinc compoundsN9820 lbs239 lbs239 lbs
7Methanol67-56-1125 lbs0 lbs125 lbs
8Manganese compoundsN4502 lbs116 lbs118 lbs
9Aluminum oxide (fibrous forms)1344-28-10 lbs42 lbs42 lbs
10Ethylene glycol107-21-110 lbs0 lbs10 lbs
11Polycyclic aromatic compoundsN5903 lbs0 lbs3 lbs
12Lead7439-92-10 lbs2 lbs2 lbs
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