Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 119 Rockleigh Pl, Houston, TX 77017

HCAD #0283540000018
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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
119 Rockleigh Pl, Houston, TX 77017
Building Size
2,886sqft
Total structure area from HCAD building records.
Elevation
24.85 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)
34.69 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
276.7 acres
93.8% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$50,889
Based on HCAD building value of $78,291.
Depth-Damage (Neighborhood)
$147,351
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
10.1th percentile
Property Pollution Ranking
High
Higher pollution than 90% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
7.94 millionlbs
Extremely High
1217.0x more than typical Houston property
≈ 397 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
7.83 millionlbs
Extremely High
1623.5x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
111 thousandlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
8
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)7,940,349 lbs7,829,134 lbs111,215 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)610,351 lbs594,865 lbs15,486 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 90% 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 chemicals released near this property (past 10 years):
Styrene, Ammonia, Propylene, Hydrogen cyanide, 1,3-Butadiene
View the full list of 56 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(56 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Styrene100-42-51,724,913 lbs7,271 lbs1,732,184 lbs
2Ammonia7664-41-71,447,039 lbs29,897 lbs1,476,936 lbs
3Propylene115-07-1951,344 lbs0 lbs951,344 lbs
4Hydrogen cyanide74-90-8818,552 lbs0 lbs818,552 lbs
51,3-Butadiene106-99-0452,685 lbs1 lbs452,686 lbs
6n-Hexane110-54-3391,060 lbs0 lbs391,067 lbs
7Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9376,938 lbs0 lbs376,938 lbs
8Ethylene74-85-1294,940 lbs0 lbs294,940 lbs
9Methyl tert-butyl ether1634-04-4267,534 lbs0 lbs267,534 lbs
10Xylene (mixed isomers)1330-20-7227,286 lbs627 lbs227,943 lbs
11Hydrogen sulfide7783-06-4212,749 lbs0 lbs212,749 lbs
12Benzene71-43-2203,267 lbs457 lbs203,735 lbs
13Toluene108-88-3164,253 lbs244 lbs164,521 lbs
14Diethanolamine111-42-2101,560 lbs0 lbs101,560 lbs
15Methanol67-56-159,808 lbs39,325 lbs99,134 lbs
16Cyclohexane110-82-752,502 lbs0 lbs52,511 lbs
17Ethylbenzene100-41-427,302 lbs63 lbs27,373 lbs
18N,N-Dimethylformamide68-12-222,161 lbs88 lbs22,249 lbs
19Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs21,954 lbs21,954 lbs
20tert-Butyl alcohol75-65-015,278 lbs0 lbs15,278 lbs
21Sodium nitrite7632-00-00 lbs9,470 lbs9,470 lbs
22Naphthalene91-20-34,683 lbs75 lbs4,766 lbs
23Polycyclic aromatic compoundsN5902,865 lbs525 lbs3,591 lbs
241,2,4-Trimethylbenzene95-63-63,058 lbs0 lbs3,072 lbs
25Vinyl acetate108-05-41,608 lbs0 lbs1,608 lbs
26Cumene98-82-81,572 lbs0 lbs1,574 lbs
27Phenol108-95-20 lbs1,155 lbs1,155 lbs
28Acetaldehyde75-07-01,011 lbs0 lbs1,011 lbs
29Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0999 lbs0 lbs999 lbs
30Lead7439-92-1397 lbs44 lbs442 lbs
311,1,1,2-Tetrachloroethane630-20-6434 lbs0 lbs434 lbs
32Biphenyl92-52-4345 lbs0 lbs364 lbs
33Carbon disulfide75-15-0351 lbs0 lbs351 lbs
34Chlorine7782-50-5120 lbs0 lbs120 lbs
35Dimethylamine124-40-390 lbs0 lbs90 lbs
36Mercury7439-97-677 lbs0 lbs77 lbs
37Lead And Lead CompoundsN42063 lbs10 lbs73 lbs
38Vanadium compoundsN77065 lbs0 lbs65 lbs
39Isoprene78-79-560 lbs0 lbs60 lbs
40Boron trifluoride7637-07-236 lbs0 lbs36 lbs
41Allyl alcohol107-18-634 lbs0 lbs34 lbs
42Methoxone sodium salt3653-48-320 lbs0 lbs20 lbs
43Triethylamine121-44-817 lbs0 lbs17 lbs
44Acrolein107-02-813 lbs0 lbs13 lbs
45Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
46Ethylene glycol107-21-11 lbs0 lbs10 lbs
47Hydroquinone123-31-99 lbs0 lbs9 lbs
48Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
49Benzo[g,h,i]perylene191-24-20 lbs7 lbs7 lbs
50Mercury compoundsN4583 lbs1 lbs4 lbs
51Diaminotoluene (mixed isomers)25376-45-84 lbs0 lbs4 lbs
52Pyridine110-86-13 lbs0 lbs3 lbs
53Chloroethane75-00-32 lbs0 lbs2 lbs
54p-Cresol106-44-52 lbs0 lbs2 lbs
55Trichloroethylene79-01-61 lbs0 lbs1 lbs
562,4-Diaminotoluene95-80-71 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Styrene, Ammonia, Hydrogen cyanide, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), n-Hexane
View the full list of 38 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(38 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Styrene100-42-5130,778 lbs291 lbs131,070 lbs
2Ammonia7664-41-7103,640 lbs78 lbs103,717 lbs
3Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
4Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-950,698 lbs0 lbs50,698 lbs
5n-Hexane110-54-335,025 lbs0 lbs35,025 lbs
6Propylene115-07-134,316 lbs0 lbs34,316 lbs
71,3-Butadiene106-99-030,971 lbs0 lbs30,971 lbs
8Xylene (mixed isomers)1330-20-726,533 lbs10 lbs26,543 lbs
9Methanol67-56-17,001 lbs14,541 lbs21,542 lbs
10Methyl tert-butyl ether1634-04-418,336 lbs0 lbs18,336 lbs
11Ethylene74-85-117,089 lbs0 lbs17,089 lbs
12Benzene71-43-215,436 lbs110 lbs15,546 lbs
13Toluene108-88-315,450 lbs4 lbs15,454 lbs
14Hydrogen sulfide7783-06-414,014 lbs0 lbs14,014 lbs
15Diethanolamine111-42-210,082 lbs0 lbs10,082 lbs
16Cyclohexane110-82-74,048 lbs0 lbs4,048 lbs
17Ethylbenzene100-41-42,657 lbs1 lbs2,658 lbs
18N,N-Dimethylformamide68-12-21,641 lbs0 lbs1,641 lbs
19tert-Butyl alcohol75-65-01,021 lbs0 lbs1,021 lbs
20Naphthalene91-20-3754 lbs7 lbs761 lbs
21Polycyclic aromatic compoundsN590354 lbs55 lbs409 lbs
22Sodium nitrite7632-00-00 lbs371 lbs371 lbs
23Cumene98-82-8284 lbs0 lbs284 lbs
24Carbon disulfide75-15-0241 lbs0 lbs241 lbs
251,2,4-Trimethylbenzene95-63-6222 lbs0 lbs222 lbs
26Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0221 lbs0 lbs221 lbs
271,1,1,2-Tetrachloroethane630-20-6212 lbs0 lbs212 lbs
28Lead And Lead CompoundsN42031 lbs5 lbs36 lbs
29Biphenyl92-52-433 lbs0 lbs33 lbs
30Dimethylamine124-40-323 lbs0 lbs23 lbs
31Isoprene78-79-58 lbs0 lbs8 lbs
32Phenol108-95-20 lbs8 lbs8 lbs
33Mercury7439-97-67 lbs0 lbs7 lbs
34Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
35Vinyl acetate108-05-45 lbs0 lbs5 lbs
36Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs2 lbs
37Boron trifluoride7637-07-21 lbs0 lbs1 lbs
38Acetaldehyde75-07-01 lbs0 lbs1 lbs
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