Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 2921 Iola St, Houston, TX 77017

HCAD #0283420020004
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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
2921 Iola St, Houston, TX 77017
Building Size
1,674sqft
Total structure area from HCAD building records.
Elevation
29.87 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
112.1 acres
38.0% of 500m radius flooded.
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
5.9th percentile
Property Pollution Ranking
Very High
Higher pollution than 94% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
20.88 millionlbs
Extremely High
3199.9x more than typical Houston property
≈ 1.0K dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
7.74 millionlbs
Extremely High
1604.3x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
13.14 millionlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
10
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)20,877,124 lbs7,736,644 lbs13,140,480 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,656,299 lbs588,127 lbs2,068,172 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 94% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 0-9th percentile (top 10% most polluted).
📋
Top chemicals released near this property (past 10 years):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia, Styrene, Hydrogen cyanide, Propylene
View the full list of 70 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(70 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs13,038,121 lbs13,038,121 lbs
2Ammonia7664-41-71,696,652 lbs37,897 lbs1,734,549 lbs
3Styrene100-42-51,725,883 lbs7,271 lbs1,733,154 lbs
4Hydrogen cyanide74-90-81,408,014 lbs0 lbs1,408,014 lbs
5Propylene115-07-1811,054 lbs0 lbs811,054 lbs
61,3-Butadiene106-99-0444,038 lbs1 lbs444,039 lbs
7Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9383,635 lbs0 lbs383,635 lbs
8Methyl tert-butyl ether1634-04-4267,534 lbs0 lbs267,534 lbs
9Ethylene74-85-1183,916 lbs0 lbs183,916 lbs
10Xylene (mixed isomers)1330-20-7132,548 lbs0 lbs132,548 lbs
11Ozone10028-15-6115,228 lbs0 lbs115,228 lbs
12Methanol67-56-157,574 lbs39,325 lbs96,900 lbs
13Toluene108-88-395,624 lbs86 lbs95,710 lbs
14n-Hexane110-54-389,060 lbs0 lbs89,060 lbs
15Cyclohexane110-82-780,271 lbs0 lbs80,271 lbs
16Benzene71-43-277,103 lbs373 lbs77,476 lbs
17Hydrogen sulfide7783-06-423,987 lbs3,527 lbs27,514 lbs
18N,N-Dimethylformamide68-12-222,161 lbs88 lbs22,249 lbs
19Ethylbenzene100-41-420,666 lbs109 lbs20,775 lbs
201,2,4-Trimethylbenzene95-63-617,333 lbs0 lbs17,333 lbs
21tert-Butyl alcohol75-65-015,285 lbs0 lbs15,285 lbs
22Ethylene glycol107-21-114,690 lbs0 lbs14,690 lbs
231,4-Dioxane123-91-110,779 lbs0 lbs10,779 lbs
24Sodium nitrite7632-00-00 lbs9,470 lbs9,470 lbs
25Carbon disulfide75-15-08,908 lbs0 lbs8,908 lbs
26Cyanide compoundsN1065,934 lbs45 lbs5,979 lbs
27Molybdenum trioxide1313-27-55,795 lbs0 lbs5,795 lbs
28Naphthalene91-20-34,575 lbs72 lbs4,647 lbs
29Phenol108-95-21,635 lbs1,804 lbs3,439 lbs
30Cumene98-82-82,256 lbs0 lbs2,256 lbs
31Polycyclic aromatic compoundsN5901,636 lbs410 lbs2,046 lbs
32Phthalic anhydride85-44-92,000 lbs0 lbs2,000 lbs
33Vinyl acetate108-05-41,608 lbs0 lbs1,608 lbs
34Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-01,460 lbs0 lbs1,460 lbs
35Carbonyl sulfide463-58-11,451 lbs0 lbs1,451 lbs
36Manganese7439-96-51,000 lbs331 lbs1,331 lbs
37Lead7439-92-1882 lbs382 lbs1,264 lbs
38Nickel compoundsN495654 lbs489 lbs1,143 lbs
39Acetaldehyde75-07-01,011 lbs0 lbs1,011 lbs
40Phenanthrene85-01-8937 lbs0 lbs937 lbs
41Vanadium compoundsN770144 lbs509 lbs653 lbs
421,1,1,2-Tetrachloroethane630-20-6434 lbs0 lbs434 lbs
43Cresol (mixed isomers)1319-77-3232 lbs0 lbs232 lbs
44Lead And Lead CompoundsN420203 lbs16 lbs219 lbs
45Nickel And Nickel CompoundsN49566 lbs123 lbs189 lbs
46Cobalt compoundsN096131 lbs24 lbs155 lbs
47Chlorine7782-50-5120 lbs0 lbs120 lbs
48Dimethylamine124-40-390 lbs0 lbs90 lbs
49Isoprene78-79-560 lbs0 lbs60 lbs
50Lead compoundsN42042 lbs6 lbs48 lbs
51Anthracene120-12-744 lbs0 lbs44 lbs
52Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
53Antimony compoundsN01038 lbs0 lbs38 lbs
54Mercury compoundsN45835 lbs1 lbs36 lbs
55Boron trifluoride7637-07-236 lbs0 lbs36 lbs
56Allyl alcohol107-18-634 lbs0 lbs34 lbs
57Methoxone sodium salt3653-48-320 lbs0 lbs20 lbs
58Triethylamine121-44-817 lbs0 lbs17 lbs
59Benzo[g,h,i]perylene191-24-213 lbs0 lbs13 lbs
60Acrolein107-02-813 lbs0 lbs13 lbs
61Mercury And Mercury CompoundsN45812 lbs0 lbs12 lbs
62Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
63Hydroquinone123-31-99 lbs0 lbs9 lbs
64Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
65Diaminotoluene (mixed isomers)25376-45-84 lbs0 lbs4 lbs
66Pyridine110-86-13 lbs0 lbs3 lbs
67Chloroethane75-00-32 lbs0 lbs2 lbs
68p-Cresol106-44-52 lbs0 lbs2 lbs
69Trichloroethylene79-01-61 lbs0 lbs1 lbs
702,4-Diaminotoluene95-80-71 lbs0 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Styrene, Ammonia, Hydrogen cyanide, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
View the full list of 47 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(47 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs2,051,661 lbs2,051,661 lbs
2Styrene100-42-5130,834 lbs291 lbs131,126 lbs
3Ammonia7664-41-7129,969 lbs1,105 lbs131,073 lbs
4Hydrogen cyanide74-90-8103,731 lbs0 lbs103,731 lbs
5Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-950,799 lbs0 lbs50,799 lbs
61,3-Butadiene106-99-031,705 lbs0 lbs31,705 lbs
7Propylene115-07-128,420 lbs0 lbs28,420 lbs
8Ozone10028-15-625,701 lbs0 lbs25,701 lbs
9Methanol67-56-17,001 lbs14,541 lbs21,542 lbs
10Methyl tert-butyl ether1634-04-418,336 lbs0 lbs18,336 lbs
11Xylene (mixed isomers)1330-20-714,973 lbs0 lbs14,973 lbs
12Ethylene74-85-18,834 lbs0 lbs8,834 lbs
13Cyclohexane110-82-77,486 lbs0 lbs7,486 lbs
14Toluene108-88-36,228 lbs8 lbs6,236 lbs
15Benzene71-43-26,035 lbs114 lbs6,149 lbs
16Ethylene glycol107-21-15,094 lbs0 lbs5,094 lbs
17Molybdenum trioxide1313-27-51,804 lbs0 lbs1,804 lbs
18n-Hexane110-54-31,713 lbs0 lbs1,713 lbs
19N,N-Dimethylformamide68-12-21,641 lbs0 lbs1,641 lbs
201,2,4-Trimethylbenzene95-63-61,449 lbs0 lbs1,449 lbs
21Ethylbenzene100-41-41,417 lbs5 lbs1,422 lbs
22Carbonyl sulfide463-58-11,041 lbs0 lbs1,041 lbs
23tert-Butyl alcohol75-65-01,021 lbs0 lbs1,021 lbs
24Hydrogen sulfide7783-06-4715 lbs0 lbs715 lbs
25Carbon disulfide75-15-0484 lbs0 lbs484 lbs
26Sodium nitrite7632-00-00 lbs371 lbs371 lbs
271,4-Dioxane123-91-1328 lbs0 lbs328 lbs
28Naphthalene91-20-3243 lbs7 lbs250 lbs
29Cumene98-82-8241 lbs0 lbs241 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
32Phenol108-95-2164 lbs0 lbs164 lbs
33Lead And Lead CompoundsN420127 lbs7 lbs134 lbs
34Polycyclic aromatic compoundsN5902 lbs40 lbs42 lbs
35Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
36Lead7439-92-120 lbs22 lbs42 lbs
37Phenanthrene85-01-836 lbs0 lbs36 lbs
38Dimethylamine124-40-323 lbs0 lbs23 lbs
39Mercury And Mercury CompoundsN4588 lbs0 lbs8 lbs
40Isoprene78-79-58 lbs0 lbs8 lbs
41Benzo[g,h,i]perylene191-24-28 lbs0 lbs8 lbs
42Vinyl acetate108-05-45 lbs0 lbs5 lbs
43Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs2 lbs
44Boron trifluoride7637-07-21 lbs0 lbs1 lbs
45Acetaldehyde75-07-01 lbs0 lbs1 lbs
46Cresol (mixed isomers)1319-77-31 lbs0 lbs1 lbs
47Anthracene120-12-71 lbs0 lbs1 lbs
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