Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 917 Herbert Ave, Pasadena, TX 77506

HCAD #0701290020013
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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
917 Herbert Ave, Pasadena, TX 77506
Building Size
1,650sqft
Total structure area from HCAD building records.
Elevation
27.84 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)
37.69 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
241.7 acres
82.0% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$86,210
Based on HCAD building value of $132,631.
Depth-Damage (Neighborhood)
$83,397
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
14.6th percentile
Property Pollution Ranking
High
Higher pollution than 85% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
2.6 millionlbs
Extremely High
398.1x more than typical Houston property
≈ 130 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
2.6 millionlbs
Extremely High
538.5x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
633lbs
High
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)2,597,544 lbs2,596,911 lbs633 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)68,333 lbs67,816 lbs33 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 85% 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):
n-Hexane, Propylene, Methanol, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen cyanide
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-Hexane110-54-3669,089 lbs170 lbs669,672 lbs
2Propylene115-07-1271,630 lbs0 lbs271,630 lbs
3Methanol67-56-1267,145 lbs0 lbs267,145 lbs
4Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9250,113 lbs0 lbs250,113 lbs
5Hydrogen cyanide74-90-8213,734 lbs0 lbs213,734 lbs
6Xylene (mixed isomers)1330-20-7207,168 lbs129 lbs209,636 lbs
7Toluene108-88-3141,699 lbs43 lbs142,608 lbs
8Ammonia7664-41-7130,868 lbs0 lbs130,868 lbs
9Benzene71-43-288,739 lbs44 lbs89,338 lbs
10Ethylene74-85-178,455 lbs0 lbs78,455 lbs
11Vinyl acetate108-05-470,754 lbs0 lbs70,754 lbs
12Ethylbenzene100-41-438,818 lbs61 lbs39,473 lbs
13Hydrogen sulfide7783-06-437,772 lbs0 lbs37,773 lbs
141,2,4-Trimethylbenzene95-63-629,854 lbs105 lbs30,222 lbs
151,3-Butadiene106-99-029,071 lbs0 lbs29,071 lbs
16Naphthalene91-20-315,848 lbs21 lbs17,192 lbs
17Cyclohexane110-82-715,071 lbs0 lbs15,830 lbs
18Cumene98-82-87,550 lbs10 lbs7,743 lbs
19Dimethylamine124-40-36,912 lbs0 lbs6,912 lbs
20Acetaldehyde75-07-06,116 lbs0 lbs6,116 lbs
21Ethylene glycol107-21-15,553 lbs0 lbs5,553 lbs
22Biphenyl92-52-44,816 lbs0 lbs5,138 lbs
23Formaldehyde50-00-02,284 lbs0 lbs2,284 lbs
24Acrylonitrile107-13-12,224 lbs0 lbs2,224 lbs
25Propylene oxide75-56-91,829 lbs0 lbs1,829 lbs
26Formic acid64-18-61,406 lbs0 lbs1,406 lbs
27Phenol108-95-2815 lbs0 lbs815 lbs
28Diethanolamine111-42-2600 lbs0 lbs600 lbs
29Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
30Chlorine7782-50-5268 lbs0 lbs268 lbs
31Nickel7440-02-0120 lbs0 lbs120 lbs
32Certain glycol ethersN23092 lbs0 lbs92 lbs
33Manganese7439-96-570 lbs0 lbs70 lbs
34Styrene100-42-556 lbs0 lbs56 lbs
35Chromium7440-47-340 lbs0 lbs40 lbs
36C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
37Mercury7439-97-630 lbs0 lbs30 lbs
38Polycyclic aromatic compoundsN59024 lbs2 lbs26 lbs
39Lead And Lead CompoundsN4203 lbs22 lbs25 lbs
40Lead compoundsN4202 lbs22 lbs23 lbs
41Methyl tert-butyl ether1634-04-42 lbs5 lbs10 lbs
42Benzo[g,h,i]perylene191-24-23 lbs0 lbs3 lbs
43Mercury And Mercury CompoundsN4581 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Methanol, Xylene (mixed isomers), Ammonia, Toluene, Vinyl acetate
View the full list of 33 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(33 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-115,730 lbs0 lbs15,730 lbs
2Xylene (mixed isomers)1330-20-78,750 lbs15 lbs8,977 lbs
3Ammonia7664-41-77,948 lbs0 lbs7,948 lbs
4Toluene108-88-36,779 lbs5 lbs6,802 lbs
5Vinyl acetate108-05-45,850 lbs0 lbs5,850 lbs
6n-Hexane110-54-35,671 lbs0 lbs5,704 lbs
7Benzene71-43-24,587 lbs4 lbs4,604 lbs
81,2,4-Trimethylbenzene95-63-63,145 lbs0 lbs3,283 lbs
9Ethylbenzene100-41-41,757 lbs7 lbs1,797 lbs
10Propylene115-07-11,119 lbs0 lbs1,119 lbs
111,3-Butadiene106-99-0956 lbs0 lbs956 lbs
12Hydrogen sulfide7783-06-4923 lbs0 lbs923 lbs
13Dimethylamine124-40-3864 lbs0 lbs864 lbs
14Naphthalene91-20-3651 lbs1 lbs670 lbs
15Ethylene glycol107-21-1529 lbs0 lbs529 lbs
16Ethylene74-85-1521 lbs0 lbs521 lbs
17Cyclohexane110-82-7355 lbs0 lbs373 lbs
18Acrylonitrile107-13-1278 lbs0 lbs278 lbs
19Cumene98-82-8271 lbs0 lbs272 lbs
20Formaldehyde50-00-0255 lbs0 lbs255 lbs
21Phenol108-95-2255 lbs0 lbs255 lbs
22Propylene oxide75-56-9255 lbs0 lbs255 lbs
23Formic acid64-18-6189 lbs0 lbs189 lbs
24Acetaldehyde75-07-045 lbs0 lbs45 lbs
25Manganese7439-96-530 lbs0 lbs30 lbs
26Chromium7440-47-325 lbs0 lbs25 lbs
27Chlorine7782-50-525 lbs0 lbs25 lbs
28Nickel7440-02-024 lbs0 lbs24 lbs
29Certain glycol ethersN23011 lbs0 lbs11 lbs
30Diethanolamine111-42-210 lbs0 lbs10 lbs
31Styrene100-42-57 lbs0 lbs7 lbs
32Lead And Lead CompoundsN4201 lbs1 lbs1 lbs
33Polycyclic aromatic compoundsN5900 lbs0 lbs1 lbs
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