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
111 ROCKLEIGH PL HOUSTON 77017
Building Size
2,748 sqft
Total structure area from HCAD building records.
Elevation
25.59 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: 15.59 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
High
Higher pollution than 90% 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)
7.92 million lbs
Extremely High
1214.6x more than typical Houston property
≈ 396 dump trucks of chemicals within 2 miles
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)
7.81 million lbs
Extremely High
1620.2x 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)
111 thousand lbs
Extremely 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)7,924,349 lbs7,813,134 lbs111,215 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)720,727 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 15% most polluted).

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
6Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9376,938 lbs0 lbs376,938 lbs
7n-Hexane110-54-3375,060 lbs0 lbs375,067 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, Diethanolamine, Hydrogen cyanide, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

View the full list of 43 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (43 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Styrene100-42-5130,778 lbs291 lbs131,070 lbs
2Ammonia7664-41-7103,640 lbs78 lbs111,991 lbs
3Diethanolamine111-42-210,082 lbs0 lbs85,611 lbs
4Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-950,698 lbs0 lbs50,698 lbs
6n-Hexane110-54-335,025 lbs0 lbs35,025 lbs
7Propylene115-07-134,316 lbs0 lbs34,316 lbs
8Methyl tert-butyl ether1634-04-418,336 lbs0 lbs31,624 lbs
91,3-Butadiene106-99-030,971 lbs0 lbs30,971 lbs
10Xylene (mixed isomers)1330-20-726,533 lbs10 lbs26,557 lbs
11Methanol67-56-17,001 lbs14,541 lbs22,144 lbs
12Ethylene74-85-117,089 lbs0 lbs17,089 lbs
13Benzene71-43-215,436 lbs110 lbs16,025 lbs
14Toluene108-88-315,450 lbs4 lbs15,506 lbs
15Hydrogen sulfide7783-06-414,014 lbs0 lbs14,014 lbs
16Ethylene glycol107-21-10 lbs0 lbs7,019 lbs
17Cyclohexane110-82-74,048 lbs0 lbs4,048 lbs
18Phenol108-95-20 lbs8 lbs2,825 lbs
19Ethylbenzene100-41-42,657 lbs1 lbs2,665 lbs
20N,N-Dimethylformamide68-12-21,641 lbs0 lbs1,842 lbs
21Certain glycol ethersN2300 lbs0 lbs1,111 lbs
22tert-Butyl alcohol75-65-01,021 lbs0 lbs1,021 lbs
23Nickel And Nickel CompoundsN4950 lbs0 lbs915 lbs
24Naphthalene91-20-3754 lbs7 lbs818 lbs
25Polycyclic aromatic compoundsN590354 lbs55 lbs409 lbs
26Sodium nitrite7632-00-00 lbs371 lbs371 lbs
27Cumene98-82-8284 lbs0 lbs284 lbs
28Carbon disulfide75-15-0241 lbs0 lbs241 lbs
291,2,4-Trimethylbenzene95-63-6222 lbs0 lbs222 lbs
30Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0221 lbs0 lbs221 lbs
311,1,1,2-Tetrachloroethane630-20-6212 lbs0 lbs212 lbs
32Lead And Lead CompoundsN42031 lbs5 lbs36 lbs
33Biphenyl92-52-433 lbs0 lbs33 lbs
34Dimethylamine124-40-323 lbs0 lbs23 lbs
35Isoprene78-79-58 lbs0 lbs8 lbs
36Lead7439-92-10 lbs0 lbs8 lbs
37Mercury7439-97-67 lbs0 lbs7 lbs
38Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
39Vinyl acetate108-05-45 lbs0 lbs5 lbs
40Vanadium (except when contained in an alloy)7440-62-20 lbs0 lbs3 lbs
41Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs3 lbs
42Boron trifluoride7637-07-21 lbs0 lbs1 lbs
43Acetaldehyde75-07-01 lbs0 lbs1 lbs

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