Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 639 Overbluff St, Channelview, TX 77530

HCAD #0984420000014
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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
639 Overbluff St, Channelview, TX 77530
Building Size
1,696sqft
Total structure area from HCAD building records.
Elevation
27.66 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very High
Property flooded at 9.84ft depth.
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 High
Flood Depth
9.84 ft±0.5 ft
Depth of water above ground level.
Water Surface Elevation (WSE)
37.50 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
187.9 acres
63.7% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$75,180
Based on HCAD building value of $115,662.
Depth-Damage (Neighborhood)
$80,971
Based on neighborhood replacement cost.
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 Flooded
Flood Depth: 9.84 feet
Severity
Severe
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
27.2th percentile
Property Pollution Ranking
Moderate
Higher pollution than 73% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
360 thousandlbs
Very High
55.1x more than typical Houston property
≈ 18 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
354 thousandlbs
Very High
73.4x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
6 thousandlbs
Very High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
7
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)359,583 lbs353,794 lbs5,788 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)3,807 lbs3,231 lbs0 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 chemicals released near this property (past 10 years):
Chlorine, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Chlorodifluoromethane (HCFC-22), Chlorothalonil, Ammonia
View the full list of 28 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(28 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Chlorine7782-50-593,095 lbs0 lbs93,095 lbs
2Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-056,509 lbs0 lbs56,509 lbs
3Chlorodifluoromethane (HCFC-22)75-45-646,271 lbs0 lbs46,271 lbs
4Chlorothalonil1897-45-629,974 lbs83 lbs30,057 lbs
5Ammonia7664-41-723,659 lbs3,477 lbs27,136 lbs
6Styrene100-42-526,310 lbs0 lbs26,310 lbs
7Xylene (mixed isomers)1330-20-714,995 lbs0 lbs14,995 lbs
8Carbon tetrachloride56-23-514,345 lbs12 lbs14,358 lbs
9m-Xylene108-38-311,963 lbs54 lbs12,017 lbs
10Vanadium compoundsN7706,236 lbs2,153 lbs8,389 lbs
11Toluene108-88-36,758 lbs0 lbs7,334 lbs
12Methanol67-56-16,541 lbs0 lbs6,541 lbs
13Ethylbenzene100-41-44,169 lbs0 lbs4,169 lbs
14Biphenyl92-52-43,407 lbs0 lbs3,407 lbs
15Hydrogen cyanide74-90-83,231 lbs0 lbs3,231 lbs
16Cyclohexane110-82-71,732 lbs0 lbs1,732 lbs
17Formic acid64-18-61,012 lbs0 lbs1,012 lbs
18Hexachlorobenzene118-74-11,002 lbs1 lbs1,003 lbs
19Certain glycol ethersN230903 lbs0 lbs903 lbs
201,2,4-Trimethylbenzene95-63-6863 lbs0 lbs863 lbs
21Ethylene glycol107-21-1398 lbs0 lbs398 lbs
22Phthalic anhydride85-44-9184 lbs0 lbs184 lbs
23Maleic anhydride108-31-6139 lbs0 lbs139 lbs
24Dioxin and dioxin-like compoundsN15039 lbs0 lbs39 lbs
25Nitric acid7697-37-228 lbs0 lbs28 lbs
26Naphthalene91-20-319 lbs0 lbs19 lbs
27Nonylphenol EthoxylatesN53510 lbs0 lbs10 lbs
28Lead7439-92-13 lbs7 lbs10 lbs
📋
Top chemicals released near this property (2024 only):
Methanol, Toluene, Cyclohexane, Chlorine, Certain glycol ethers
View the full list of 6 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(6 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-11,343 lbs0 lbs1,343 lbs
2Toluene108-88-3314 lbs0 lbs890 lbs
3Cyclohexane110-82-7759 lbs0 lbs759 lbs
4Chlorine7782-50-5428 lbs0 lbs428 lbs
5Certain glycol ethersN230214 lbs0 lbs214 lbs
6Formic acid64-18-6173 lbs0 lbs173 lbs
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