Data-driven insights for local properties

Complete Property Analysis

Environmental risk, tax analysis, and property details for 218 Howald St, La Porte, TX 77571

HCAD #0610610030036
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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 AE
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
218 Howald St, La Porte, TX 77571
Elevation
12.58 ft
Height above sea level from USGS data.
FEMA Flood Zone
AE
High Risk - 1% annual chance with established base flood elevation
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)
22.43 ft
Water surface elevation relative to sea level (NAVD88 datum).
Area Inundated
294.9 acres
100.0% of 500m radius flooded.
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage (HCAD Valuation)
$0
Vacant lot (no building data).
Depth-Damage (Neighborhood)
$0
Vacant lot (no building data).
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
Special Flood Hazard Area (SFHA): Flood insurance required for federally backed mortgages
#2
Obtain an Elevation Certificate to determine accurate flood insurance premiums
#3
Property elevation currently above simulated flood level
#4
Maintain flood insurance coverage as required in Special Flood Hazard Areas
#5
Review official FEMA Flood Insurance Rate Map (FIRM) for detailed flood zone boundaries
#6
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information
🏭Industrial Pollution Exposure
17.8th percentile
Property Pollution Ranking
High
Higher pollution than 82% of Houston homes
Compares pollution within 2mi against 10,000 Houston properties. Lower percentiles = higher pollution.
Industrial Pollution Nearby (10 Years)
1.38 millionlbs
Extremely High
211.3x more than typical Houston property
≈ 69 dump trucks of chemicals within 2 miles
Air Pollution (10 Years)
1.38 millionlbs
Extremely High
285.7x more than typical Houston property
Includes fugitive emissions (leaks) and stack emissions (smokestacks).
Water Pollution (10 Years)
479lbs
High
Discharges to bayous, streams, and drainage systems.
Facilities Nearby
14
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)1,378,412 lbs1,377,934 lbs479 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)117,780 lbs117,775 lbs5 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 82% 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):
Methanol, Ethylene, Vinyl acetate, Cyclohexane, Ammonia
View the full list of 50 chemicals below.
Chemicals Released (2014-2024, 10-Year Total)(50 chemicals)
#ChemicalCAS#Air (lbs/10yr)Water (lbs/10yr)Total (lbs/10yr)
1Methanol67-56-1356,722 lbs55 lbs356,777 lbs
2Ethylene74-85-1346,604 lbs0 lbs346,604 lbs
3Vinyl acetate108-05-4139,491 lbs0 lbs139,491 lbs
4Cyclohexane110-82-7102,641 lbs0 lbs102,641 lbs
5Ammonia7664-41-787,668 lbs0 lbs87,668 lbs
6Hydroquinone123-31-942,495 lbs0 lbs42,495 lbs
7Propylene115-07-136,801 lbs0 lbs36,801 lbs
8Methyl isobutyl ketone108-10-136,313 lbs0 lbs36,313 lbs
9Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-035,668 lbs0 lbs35,668 lbs
10Cumene98-82-831,096 lbs0 lbs31,096 lbs
11n-Hexane110-54-317,593 lbs0 lbs17,593 lbs
12Propylene oxide75-56-916,752 lbs0 lbs16,752 lbs
13Isoprene78-79-515,828 lbs0 lbs15,828 lbs
14Acetaldehyde75-07-014,843 lbs0 lbs14,843 lbs
15Styrene100-42-512,913 lbs0 lbs12,913 lbs
16Chlorine7782-50-512,676 lbs0 lbs12,676 lbs
171,3-Butadiene106-99-012,674 lbs0 lbs12,674 lbs
18Benzene71-43-210,536 lbs0 lbs10,536 lbs
19Xylene (mixed isomers)1330-20-75,625 lbs0 lbs5,625 lbs
20Toluene108-88-34,300 lbs0 lbs4,300 lbs
21Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
22Acrylic acid79-10-73,532 lbs0 lbs3,532 lbs
23Chlorobenzene108-90-73,127 lbs0 lbs3,127 lbs
24Methyl methacrylate80-62-63,050 lbs0 lbs3,050 lbs
251,2-Butylene oxide106-88-72,348 lbs0 lbs2,348 lbs
26Phosgene75-44-51,958 lbs0 lbs1,958 lbs
27Allyl alcohol107-18-61,820 lbs0 lbs1,820 lbs
28Acetonitrile75-05-81,765 lbs0 lbs1,765 lbs
29Methyl tert-butyl ether1634-04-41,591 lbs0 lbs1,591 lbs
30Triethylamine121-44-81,515 lbs0 lbs1,515 lbs
31Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
32Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
33sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
34Ethylene oxide75-21-81,431 lbs0 lbs1,431 lbs
35Nitric acid7697-37-21,405 lbs0 lbs1,405 lbs
36tert-Butyl alcohol75-65-01,254 lbs0 lbs1,254 lbs
37n-Butyl alcohol71-36-31,211 lbs0 lbs1,211 lbs
38Dicyclopentadiene77-73-61,178 lbs0 lbs1,178 lbs
39Diphenylamine122-39-4997 lbs0 lbs997 lbs
40Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7664-93-9597 lbs0 lbs597 lbs
41N,N-Dimethylformamide68-12-2535 lbs0 lbs535 lbs
42Ethylene glycol107-21-1527 lbs0 lbs527 lbs
43Nitrate compounds (water dissociable; reportable only when in aqueous solution)N5110 lbs370 lbs370 lbs
44Dichloromethane75-09-2251 lbs0 lbs251 lbs
45Zinc compoundsN98235 lbs33 lbs68 lbs
46Antimony compoundsN01020 lbs15 lbs35 lbs
47Phthalic anhydride85-44-913 lbs0 lbs13 lbs
48Antimony And Antimony CompoundsN0105 lbs5 lbs10 lbs
49Butyl acrylate141-32-25 lbs0 lbs5 lbs
50Nickel compoundsN4950 lbs1 lbs1 lbs
📋
Top chemicals released near this property (2024 only):
Methanol, Ethylene, Vinyl acetate, Propylene, Cyclohexane
View the full list of 36 chemicals reported within 2 miles for 2024.
Chemicals Released (2024 Only)(36 chemicals)
#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-125,125 lbs5 lbs25,130 lbs
2Ethylene74-85-124,713 lbs0 lbs24,713 lbs
3Vinyl acetate108-05-414,116 lbs0 lbs14,116 lbs
4Propylene115-07-110,035 lbs0 lbs10,035 lbs
5Cyclohexane110-82-78,101 lbs0 lbs8,101 lbs
6Ammonia7664-41-77,795 lbs0 lbs7,795 lbs
7Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,374 lbs0 lbs6,374 lbs
8Hydroquinone123-31-94,862 lbs0 lbs4,862 lbs
9Methyl isobutyl ketone108-10-13,997 lbs0 lbs3,997 lbs
10Cumene98-82-82,611 lbs0 lbs2,611 lbs
11Isoprene78-79-52,125 lbs0 lbs2,125 lbs
121,3-Butadiene106-99-01,187 lbs0 lbs1,187 lbs
13Benzene71-43-21,090 lbs0 lbs1,090 lbs
14Chlorine7782-50-5961 lbs0 lbs961 lbs
15Styrene100-42-5540 lbs0 lbs540 lbs
16n-Hexane110-54-3521 lbs0 lbs521 lbs
17Acetaldehyde75-07-0496 lbs0 lbs496 lbs
18Chloroacetic acid79-11-8476 lbs0 lbs476 lbs
19Propylene oxide75-56-9430 lbs0 lbs430 lbs
20Ethylene oxide75-21-8420 lbs0 lbs420 lbs
21Methyl methacrylate80-62-6387 lbs0 lbs387 lbs
22Nitric acid7697-37-2217 lbs0 lbs217 lbs
23Toluene108-88-3196 lbs0 lbs196 lbs
24Acrylic acid79-10-7186 lbs0 lbs186 lbs
25Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
26Diphenylamine122-39-4103 lbs0 lbs103 lbs
27Dicyclopentadiene77-73-697 lbs0 lbs97 lbs
28Allyl alcohol107-18-696 lbs0 lbs96 lbs
29sec-Butyl alcohol78-92-293 lbs0 lbs93 lbs
30Xylene (mixed isomers)1330-20-788 lbs0 lbs88 lbs
31n-Butyl alcohol71-36-385 lbs0 lbs85 lbs
321,2-Butylene oxide106-88-752 lbs0 lbs52 lbs
33Phosgene75-44-527 lbs0 lbs27 lbs
34tert-Butyl alcohol75-65-026 lbs0 lbs26 lbs
35Ethylene glycol107-21-115 lbs0 lbs15 lbs
36Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
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