Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 77 Riley Rd, Houston, TX 77047

HCAD #0280660190001
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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
77 Riley Rd, Houston, TX 77047
Building Size
2,724sqft
Total structure area from HCAD building records.
Elevation
60.97 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
1.8 acres
0.6% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$0
Property not flooded. No damage to calculate.
Depth-Damage (Neighborhood)
$0
Property not flooded. No damage to calculate.
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
33.4th percentile
Property Pollution Ranking
Moderate
Higher pollution than 67% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
143 thousandlbs
High
22.0x more than typical Houston property
≈ 7 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
143 thousandlbs
High
29.7x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
71lbs
Above Typical
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
9
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)143,228 lbs143,156 lbs71 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)41,733 lbs24,397 lbs11 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 67% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 30-39th percentile.
📋
Top chemicals released near this property (past 10 years):
Methanol, Naphthalene, Styrene, 1,2,4-Trimethylbenzene, Certain glycol ethers
View the full list of 32 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(32 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Methanol67-56-112,654 lbs0 lbs153,116 lbs
2Naphthalene91-20-314,220 lbs0 lbs143,010 lbs
3Styrene100-42-586,218 lbs0 lbs86,218 lbs
41,2,4-Trimethylbenzene95-63-66,750 lbs0 lbs52,961 lbs
5Certain glycol ethersN2302,572 lbs0 lbs36,380 lbs
6Acrylic acid79-10-7140 lbs0 lbs12,810 lbs
7n-Butyl alcohol71-36-35,414 lbs0 lbs9,176 lbs
8Ethylene oxide75-21-84,069 lbs0 lbs4,069 lbs
9Diethanolamine111-42-22,468 lbs0 lbs3,426 lbs
10Propylene oxide75-56-93,188 lbs0 lbs3,188 lbs
11Ethylene glycol107-21-1206 lbs0 lbs2,886 lbs
12Cresol (mixed isomers)1319-77-3687 lbs0 lbs1,159 lbs
13Toluene108-88-31,076 lbs0 lbs1,076 lbs
14Ammonia7664-41-7924 lbs0 lbs1,055 lbs
15NonylphenolN53063 lbs0 lbs859 lbs
16Cyclohexane110-82-7784 lbs0 lbs784 lbs
17Xylene (mixed isomers)1330-20-7398 lbs0 lbs398 lbs
18Nickel7440-02-0223 lbs12 lbs235 lbs
19Formic acid64-18-6225 lbs0 lbs225 lbs
20Chromium7440-47-3195 lbs11 lbs206 lbs
21m-Cresol108-39-4182 lbs0 lbs182 lbs
22Cumene98-82-8174 lbs0 lbs174 lbs
23Manganese7439-96-5114 lbs12 lbs126 lbs
24Copper7440-50-884 lbs8 lbs92 lbs
25Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N04016 lbs27 lbs43 lbs
26Ethylbenzene100-41-443 lbs0 lbs43 lbs
27Formaldehyde50-00-035 lbs0 lbs35 lbs
28Maleic anhydride108-31-614 lbs0 lbs14 lbs
29Cobalt7440-48-411 lbs0 lbs11 lbs
30Antimony compoundsN0106 lbs0 lbs6 lbs
31Dicyclopentadiene77-73-63 lbs0 lbs3 lbs
32Lead7439-92-10 lbs1 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Styrene, Naphthalene, 1,2,4-Trimethylbenzene, Acrylic acid, Certain glycol ethers
View the full list of 23 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(23 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Styrene100-42-520,551 lbs0 lbs20,551 lbs
2Naphthalene91-20-31,106 lbs0 lbs9,052 lbs
31,2,4-Trimethylbenzene95-63-6634 lbs0 lbs5,454 lbs
4Acrylic acid79-10-726 lbs0 lbs2,404 lbs
5Certain glycol ethersN230107 lbs0 lbs1,806 lbs
6n-Butyl alcohol71-36-3451 lbs0 lbs451 lbs
7Ethylene oxide75-21-8433 lbs0 lbs433 lbs
8NonylphenolN53019 lbs0 lbs405 lbs
9Diethanolamine111-42-2248 lbs0 lbs344 lbs
10Propylene oxide75-56-9259 lbs0 lbs259 lbs
11Cyclohexane110-82-7215 lbs0 lbs215 lbs
12Xylene (mixed isomers)1330-20-7116 lbs0 lbs116 lbs
13Cumene98-82-882 lbs0 lbs82 lbs
14m-Cresol108-39-437 lbs0 lbs37 lbs
15Chromium7440-47-331 lbs4 lbs35 lbs
16Nickel7440-02-032 lbs3 lbs35 lbs
17Copper7440-50-819 lbs1 lbs20 lbs
18Manganese7439-96-515 lbs3 lbs18 lbs
19Cobalt7440-48-46 lbs0 lbs6 lbs
20Formaldehyde50-00-03 lbs0 lbs3 lbs
21Methanol67-56-13 lbs0 lbs3 lbs
22Maleic anhydride108-31-62 lbs0 lbs2 lbs
23Toluene108-88-31 lbs0 lbs1 lbs
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