Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 108 Blackwell St, Pasadena, TX 77506

HCAD #0640010000056
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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
108 Blackwell St, Pasadena, TX 77506
Building Size
1,756sqft
Total structure area from HCAD building records.
Elevation
22.52 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)
32.36 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
291.3 acres
98.8% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$36,227
Based on HCAD building value of $55,734.
Depth-Damage (Neighborhood)
$41,992
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
5.8th 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)
21.94 millionlbs
Extremely High
3362.7x more than typical Houston property
≈ 1.1K dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
8.9 millionlbs
Extremely High
1846.4x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
13.04 millionlbs
Extremely High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
17
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)21,939,204 lbs8,903,748 lbs13,035,456 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)2,609,178 lbs555,742 lbs2,052,953 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), Hydrogen cyanide, Propylene, n-Hexane, Ammonia
View the full list of 63 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(63 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs13,016,167 lbs13,016,167 lbs
2Hydrogen cyanide74-90-82,440,300 lbs0 lbs2,440,300 lbs
3Propylene115-07-11,262,705 lbs0 lbs1,262,705 lbs
4n-Hexane110-54-31,164,432 lbs0 lbs1,164,851 lbs
5Ammonia7664-41-71,004,095 lbs8,000 lbs1,012,095 lbs
6Xylene (mixed isomers)1330-20-7501,484 lbs723 lbs504,566 lbs
7Ethylene74-85-1387,367 lbs0 lbs387,367 lbs
8Toluene108-88-3381,774 lbs277 lbs382,932 lbs
9Benzene71-43-2355,891 lbs487 lbs356,942 lbs
10Hydrogen sulfide7783-06-4261,896 lbs3,527 lbs265,424 lbs
11Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9256,810 lbs0 lbs256,810 lbs
12Cyclohexane110-82-7146,850 lbs0 lbs147,619 lbs
13n-Butyl alcohol71-36-3137,606 lbs0 lbs137,606 lbs
14Ozone10028-15-6115,228 lbs0 lbs115,228 lbs
15Diethanolamine111-42-2102,160 lbs0 lbs102,160 lbs
16Ethylbenzene100-41-480,629 lbs152 lbs81,381 lbs
17Methanol67-56-163,708 lbs0 lbs63,708 lbs
181,3-Butadiene106-99-058,959 lbs0 lbs58,959 lbs
19Propionaldehyde123-38-631,241 lbs0 lbs31,241 lbs
201,2,4-Trimethylbenzene95-63-628,451 lbs0 lbs28,869 lbs
21Naphthalene91-20-324,443 lbs75 lbs25,848 lbs
22Butyraldehyde123-72-822,150 lbs0 lbs22,150 lbs
23Dicyclopentadiene77-73-614,013 lbs0 lbs14,013 lbs
24Cumene98-82-811,025 lbs0 lbs11,209 lbs
25Carbon disulfide75-15-08,557 lbs0 lbs8,557 lbs
26Cyanide compoundsN1065,934 lbs45 lbs5,979 lbs
27Molybdenum trioxide1313-27-55,795 lbs0 lbs5,795 lbs
28Biphenyl92-52-45,161 lbs0 lbs5,502 lbs
29Ethylene glycol107-21-15,255 lbs0 lbs5,264 lbs
30Polycyclic aromatic compoundsN5904,520 lbs525 lbs5,246 lbs
31Phenol108-95-21,635 lbs2,959 lbs4,594 lbs
32Isobutyraldehyde78-84-24,080 lbs0 lbs4,080 lbs
33Styrene100-42-53,431 lbs0 lbs3,431 lbs
34Zinc compoundsN982219 lbs1,181 lbs2,891 lbs
35Carbonyl sulfide463-58-11,451 lbs0 lbs1,451 lbs
36Nickel compoundsN495654 lbs489 lbs1,143 lbs
37Phenanthrene85-01-8937 lbs0 lbs937 lbs
38Vanadium compoundsN77079 lbs509 lbs588 lbs
39Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-0461 lbs0 lbs461 lbs
40Lead7439-92-1260 lbs126 lbs386 lbs
41Hydrogen fluoride7664-39-3229 lbs0 lbs299 lbs
42Chlorine7782-50-5268 lbs0 lbs268 lbs
43Cresol (mixed isomers)1319-77-3232 lbs0 lbs232 lbs
44Mercury compoundsN458197 lbs1 lbs199 lbs
45Nickel And Nickel CompoundsN49566 lbs123 lbs189 lbs
46Cobalt compoundsN096131 lbs24 lbs155 lbs
47Lead And Lead CompoundsN420142 lbs7 lbs149 lbs
48Nickel7440-02-0120 lbs0 lbs120 lbs
49Mercury And Mercury CompoundsN458109 lbs0 lbs109 lbs
50Mercury7439-97-6106 lbs0 lbs106 lbs
51Lead compoundsN42048 lbs52 lbs100 lbs
52Certain glycol ethersN23080 lbs0 lbs80 lbs
53Manganese7439-96-570 lbs0 lbs70 lbs
54Isoprene78-79-560 lbs0 lbs60 lbs
55Anthracene120-12-744 lbs0 lbs44 lbs
56Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
57C.I. Food Red 1581-88-940 lbs0 lbs40 lbs
58Chromium7440-47-340 lbs0 lbs40 lbs
59Antimony compoundsN01038 lbs0 lbs38 lbs
60Benzo[g,h,i]perylene191-24-216 lbs7 lbs24 lbs
61Chromium compounds (except for chromite ore mined in the Transvaal Region)N09011 lbs0 lbs11 lbs
62Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0908 lbs0 lbs8 lbs
63tert-Butyl alcohol75-65-07 lbs0 lbs7 lbs
📋
Top chemicals released near this property (2024 only):
Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Ammonia, n-Hexane, Xylene (mixed isomers)
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)
1Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs2,051,661 lbs2,051,661 lbs
2Hydrogen cyanide74-90-8177,459 lbs0 lbs177,459 lbs
3Ammonia7664-41-7110,146 lbs1,027 lbs111,173 lbs
4n-Hexane110-54-341,998 lbs0 lbs42,031 lbs
5Xylene (mixed isomers)1330-20-739,297 lbs20 lbs39,529 lbs
6Propylene115-07-137,873 lbs0 lbs37,873 lbs
7Toluene108-88-327,282 lbs10 lbs27,310 lbs
8Ozone10028-15-625,701 lbs0 lbs25,701 lbs
9Benzene71-43-224,821 lbs116 lbs24,950 lbs
10Ethylene74-85-117,866 lbs0 lbs17,866 lbs
11Hydrogen sulfide7783-06-414,468 lbs0 lbs14,468 lbs
12Cyclohexane110-82-711,657 lbs0 lbs11,675 lbs
13Diethanolamine111-42-210,092 lbs0 lbs10,092 lbs
14Ethylbenzene100-41-45,399 lbs9 lbs5,441 lbs
151,2,4-Trimethylbenzene95-63-62,716 lbs0 lbs2,854 lbs
16Molybdenum trioxide1313-27-51,804 lbs0 lbs1,804 lbs
171,3-Butadiene106-99-01,718 lbs0 lbs1,718 lbs
18Naphthalene91-20-31,600 lbs7 lbs1,625 lbs
19Carbonyl sulfide463-58-11,041 lbs0 lbs1,041 lbs
20Cumene98-82-8772 lbs0 lbs773 lbs
21Ethylene glycol107-21-1500 lbs0 lbs500 lbs
22Polycyclic aromatic compoundsN590355 lbs55 lbs410 lbs
23Styrene100-42-5269 lbs0 lbs269 lbs
24Carbon disulfide75-15-0243 lbs0 lbs243 lbs
25Phenol108-95-2164 lbs8 lbs172 lbs
26Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9101 lbs0 lbs101 lbs
27Lead And Lead CompoundsN42096 lbs2 lbs99 lbs
28Zinc compoundsN98222 lbs32 lbs54 lbs
29Cobalt And Cobalt CompoundsN09642 lbs0 lbs42 lbs
30Phenanthrene85-01-836 lbs0 lbs36 lbs
31Biphenyl92-52-433 lbs0 lbs33 lbs
32Manganese7439-96-530 lbs0 lbs30 lbs
33Mercury And Mercury CompoundsN45829 lbs0 lbs30 lbs
34Chromium7440-47-325 lbs0 lbs25 lbs
35Chlorine7782-50-525 lbs0 lbs25 lbs
36Nickel7440-02-024 lbs0 lbs24 lbs
37Benzo[g,h,i]perylene191-24-28 lbs5 lbs13 lbs
38Certain glycol ethersN23010 lbs0 lbs10 lbs
39Isoprene78-79-58 lbs0 lbs8 lbs
40Mercury7439-97-67 lbs0 lbs7 lbs
41Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)N0902 lbs0 lbs2 lbs
42Anthracene120-12-71 lbs0 lbs1 lbs
43Cresol (mixed isomers)1319-77-31 lbs0 lbs1 lbs
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