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
310 WITTER ST PASADENA 77506
Building Size
2,374 sqft
Total structure area from HCAD building records.
Elevation
24.25 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: 14.25 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 89% 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)
5.34 million lbs
Extremely High
817.9x more than typical Houston property
≈ 267 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)
5.33 million lbs
Extremely High
1106.0x 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)
3 thousand lbs
Very 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)5,336,146 lbs5,333,333 lbs2,813 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)406,017 lbs299,264 lbs71 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 89% 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):

n-Hexane, Hydrogen cyanide, Propylene, Xylene (mixed isomers), Methanol

View the full list of 43 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (43 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1n-Hexane110-54-31,088,385 lbs170 lbs1,088,975 lbs
2Hydrogen cyanide74-90-81,032,286 lbs0 lbs1,032,286 lbs
3Propylene115-07-1465,601 lbs0 lbs465,601 lbs
4Xylene (mixed isomers)1330-20-7447,497 lbs756 lbs450,622 lbs
5Methanol67-56-1329,619 lbs0 lbs329,619 lbs
6Toluene108-88-3315,451 lbs218 lbs316,559 lbs
7Benzene71-43-2285,640 lbs138 lbs286,344 lbs
8Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9250,113 lbs0 lbs250,113 lbs
9Hydrogen sulfide7783-06-4244,215 lbs0 lbs244,216 lbs
10Ammonia7664-41-7216,283 lbs0 lbs216,283 lbs
11Ethylene74-85-1206,072 lbs0 lbs206,072 lbs
12Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
13Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
14Cyclohexane110-82-767,572 lbs0 lbs68,340 lbs
15Ethylbenzene100-41-465,915 lbs65 lbs66,582 lbs
161,3-Butadiene106-99-045,992 lbs0 lbs45,992 lbs
171,2,4-Trimethylbenzene95-63-632,912 lbs105 lbs33,294 lbs
18Naphthalene91-20-320,385 lbs24 lbs21,740 lbs
19Cumene98-82-89,122 lbs10 lbs9,317 lbs
20Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
21Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
22Ethylene glycol107-21-15,553 lbs0 lbs5,562 lbs
23Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
24Polycyclic aromatic compoundsN5902,886 lbs117 lbs3,204 lbs
25Formaldehyde50-00-02,284 lbs0 lbs2,284 lbs
26Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
27Phenol108-95-2815 lbs1,155 lbs1,970 lbs
28Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
29Formic acid64-18-61,406 lbs0 lbs1,406 lbs
30Styrene100-42-51,198 lbs0 lbs1,198 lbs
31Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
32Chlorine7782-50-5268 lbs0 lbs268 lbs
33Nickel7440-02-0120 lbs0 lbs120 lbs
34Mercury7439-97-6106 lbs0 lbs106 lbs
35Certain glycol ethersN23092 lbs0 lbs92 lbs
36Manganese7439-96-570 lbs0 lbs70 lbs
37C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
38Chromium7440-47-340 lbs0 lbs40 lbs
39Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
40Lead compoundsN4202 lbs22 lbs23 lbs
41Benzo[g,h,i]perylene191-24-23 lbs7 lbs11 lbs
42Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
43Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs

Top chemicals released near this property (2024 only):

Diethanolamine, Hydrogen cyanide, n-Hexane, Xylene (mixed isomers), Ammonia

View the full list of 41 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (41 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Diethanolamine111-42-210,092 lbs0 lbs85,621 lbs
2Hydrogen cyanide74-90-873,728 lbs0 lbs73,728 lbs
3n-Hexane110-54-342,605 lbs0 lbs42,638 lbs
4Xylene (mixed isomers)1330-20-738,110 lbs25 lbs38,446 lbs
5Ammonia7664-41-716,612 lbs0 lbs25,674 lbs
6Toluene108-88-323,954 lbs5 lbs24,030 lbs
7Methanol67-56-115,730 lbs0 lbs20,533 lbs
8Benzene71-43-219,916 lbs4 lbs20,032 lbs
9Hydrogen sulfide7783-06-414,345 lbs0 lbs14,345 lbs
10Propylene115-07-110,544 lbs0 lbs10,544 lbs
11Ethylene74-85-19,396 lbs0 lbs9,396 lbs
12Ethylene glycol107-21-1529 lbs0 lbs7,568 lbs
13Vinyl acetate108-05-45,850 lbs0 lbs5,852 lbs
14Ethylbenzene100-41-44,409 lbs7 lbs4,455 lbs
15Cyclohexane110-82-74,403 lbs0 lbs4,421 lbs
161,2,4-Trimethylbenzene95-63-63,367 lbs0 lbs3,508 lbs
17Phenol108-95-2255 lbs8 lbs3,101 lbs
18Formaldehyde50-00-0255 lbs0 lbs2,348 lbs
19Formic acid64-18-6189 lbs0 lbs1,968 lbs
20Naphthalene91-20-31,403 lbs1 lbs1,483 lbs
21Certain glycol ethersN23011 lbs0 lbs1,122 lbs
221,3-Butadiene106-99-0956 lbs0 lbs956 lbs
23Nickel And Nickel CompoundsN4950 lbs0 lbs915 lbs
24Dimethylamine124-40-3864 lbs0 lbs884 lbs
25Cumene98-82-8555 lbs0 lbs556 lbs
26Lead And Lead CompoundsN4201 lbs1 lbs391 lbs
27Polycyclic aromatic compoundsN590353 lbs15 lbs369 lbs
28Acrylonitrile107-13-1278 lbs0 lbs294 lbs
29Lead compoundsN4200 lbs0 lbs269 lbs
30Propylene oxide75-56-9255 lbs0 lbs255 lbs
31Styrene100-42-5110 lbs0 lbs110 lbs
32Acetaldehyde75-07-045 lbs0 lbs45 lbs
33Biphenyl92-52-433 lbs0 lbs33 lbs
34Manganese7439-96-530 lbs0 lbs30 lbs
35Chlorine7782-50-525 lbs0 lbs25 lbs
36Chromium7440-47-325 lbs0 lbs25 lbs
37Nickel7440-02-024 lbs0 lbs24 lbs
38Lead7439-92-10 lbs0 lbs8 lbs
39Mercury7439-97-67 lbs0 lbs7 lbs
40Benzo[g,h,i]perylene191-24-20 lbs5 lbs5 lbs
41Vanadium (except when contained in an alloy)7440-62-20 lbs0 lbs3 lbs

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