Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 521 Hoffman St, Houston, TX 77020

HCAD #0120830000011
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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
521 Hoffman St, Houston, TX 77020
Building Size
2,029sqft
Total structure area from HCAD building records.
Elevation
43.53 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 (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
24.2th percentile
Property Pollution Ranking
High
Higher pollution than 76% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
522 thousandlbs
Very High
80.0x more than typical Houston property
≈ 26 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
516 thousandlbs
Extremely High
107.0x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
6 thousandlbs
Very High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
24
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)521,743 lbs515,894 lbs5,850 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)57,113 lbs56,118 lbs995 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 76% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile.
📋
Top chemicals released near this property (past 10 years):
Xylene (mixed isomers), n-Hexane, Styrene, n-Butyl alcohol, Zinc compounds
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)
1Xylene (mixed isomers)1330-20-7141,882 lbs0 lbs141,882 lbs
2n-Hexane110-54-3125,640 lbs0 lbs125,640 lbs
3Styrene100-42-578,090 lbs0 lbs78,090 lbs
4n-Butyl alcohol71-36-333,617 lbs0 lbs33,617 lbs
5Zinc compoundsN98222,813 lbs4,977 lbs27,790 lbs
6Toluene108-88-325,336 lbs0 lbs26,509 lbs
7Phenol108-95-224,642 lbs0 lbs24,642 lbs
8Ammonia7664-41-716,230 lbs0 lbs16,230 lbs
9Ethylbenzene100-41-416,163 lbs0 lbs16,163 lbs
101,2,4-Trimethylbenzene95-63-68,965 lbs0 lbs8,965 lbs
11Hydrogen sulfide7783-06-46,912 lbs0 lbs6,912 lbs
12Methyl isobutyl ketone108-10-13,355 lbs0 lbs3,355 lbs
13Cyclohexane110-82-72,389 lbs0 lbs2,389 lbs
14Formaldehyde50-00-01,893 lbs0 lbs1,893 lbs
15Methanol67-56-11,849 lbs0 lbs1,849 lbs
16Ethylene glycol107-21-11,461 lbs0 lbs1,461 lbs
17Polycyclic aromatic compoundsN5901,170 lbs1 lbs1,171 lbs
18Methyl tert-butyl ether1634-04-41,021 lbs0 lbs1,021 lbs
19Propylene115-07-1810 lbs0 lbs810 lbs
20Manganese7439-96-5166 lbs336 lbs503 lbs
21Lead7439-92-1174 lbs66 lbs240 lbs
22Manganese compoundsN45018 lbs208 lbs226 lbs
23Benzo[g,h,i]perylene191-24-2221 lbs0 lbs221 lbs
24Benzene71-43-2218 lbs0 lbs218 lbs
25Zinc (fume or dust)7440-66-6201 lbs0 lbs201 lbs
26Naphthalene91-20-3194 lbs0 lbs194 lbs
27Chromium compounds (except for chromite ore mined in the Transvaal Region)N090141 lbs15 lbs156 lbs
28DiisocyanatesN120101 lbs4 lbs105 lbs
29Aluminum oxide (fibrous forms)1344-28-11 lbs98 lbs99 lbs
30Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs67 lbs67 lbs
31Copper7440-50-867 lbs0 lbs67 lbs
32Nickel7440-02-023 lbs38 lbs61 lbs
33Lead compoundsN42038 lbs22 lbs60 lbs
34Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N09032 lbs1 lbs33 lbs
35Aluminum (fume or dust)7429-90-524 lbs0 lbs24 lbs
36Chromium7440-47-316 lbs0 lbs20 lbs
37Barium And Barium CompoundsN0400 lbs16 lbs16 lbs
38Nitrate compounds (water dissociable; reportable only when in aqueous solution)N51115 lbs0 lbs15 lbs
39Cobalt7440-48-40 lbs0 lbs4 lbs
40Lead And Lead CompoundsN4203 lbs1 lbs3 lbs
41Copper compoundsN1001 lbs1 lbs2 lbs
42Molybdenum trioxide1313-27-51 lbs0 lbs1 lbs
43Cumene98-82-81 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Xylene (mixed isomers), n-Hexane, Toluene, Styrene, Zinc compounds
View the full list of 17 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(17 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Xylene (mixed isomers)1330-20-717,453 lbs0 lbs17,453 lbs
2n-Hexane110-54-312,290 lbs0 lbs12,290 lbs
3Toluene108-88-311,886 lbs0 lbs11,886 lbs
4Styrene100-42-59,639 lbs0 lbs9,639 lbs
5Zinc compoundsN9823,361 lbs739 lbs4,100 lbs
61,2,4-Trimethylbenzene95-63-61,210 lbs0 lbs1,210 lbs
7Methanol67-56-1125 lbs0 lbs125 lbs
8Manganese compoundsN4502 lbs116 lbs118 lbs
9Polycyclic aromatic compoundsN590115 lbs0 lbs116 lbs
10Aluminum oxide (fibrous forms)1344-28-10 lbs42 lbs42 lbs
11Manganese7439-96-50 lbs41 lbs41 lbs
12Nickel7440-02-00 lbs31 lbs31 lbs
13Benzo[g,h,i]perylene191-24-221 lbs0 lbs21 lbs
14Barium compounds (except for barium sulfate (CAS No. 7727-43-7))N0400 lbs19 lbs19 lbs
15Ethylene glycol107-21-110 lbs0 lbs10 lbs
16Lead compoundsN4205 lbs3 lbs8 lbs
17Lead7439-92-10 lbs5 lbs5 lbs
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