Home > Analysis: 523 Sheldon Rd, Channelview, TX 77530

📊 Environmental Assessment Report

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.

🌊 Part 1: Flood Risk Analysis

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

523 SHELDON RD CHANNELVIEW 77530

Building Size

1,656 sqft

Total structure area from HCAD building records.

Elevation

25.83 ft

Height above sea level from USGS data.

FEMA Flood Zone

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 Estimate (HCAD Valuation)

Property not flooded at current water level. No damage to calculate.

Depth-Damage Estimate (Neighborhood Comparison)

Property not flooded at current water level. No damage to calculate.

Analysis Method

COG Bathtub 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: 15.83 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.

FEMA Zone X (minimal hazard) - flood insurance available at preferred rates.
Review the interactive flood simulator to understand how different rainfall events could affect this property.
Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking

Moderate

Higher pollution than 75% of Houston homes

This ranking compares pollution levels within 2 miles of this property against 10,000 randomly sampled Houston metro properties. Lower percentiles indicate higher pollution exposure.

Industrial Pollution Nearby (Last 10 Years)

482 thousand lbs

Very High

73.9x more than typical Houston property
≈ 24 dump trucks of chemicals within 2 miles

Total chemical releases from all industrial facilities within a 2-mile radius over the past decade (2014–2024). Data from EPA's Toxic Release Inventory tracking air, water, and land discharges.

💨 Air Pollution (Last 10 Years)

456 thousand lbs

Very High

94.5x more than typical Houston property

Chemicals released into the air from nearby facilities over 10 years. Includes both fugitive emissions (leaks, evaporation) and stack emissions (smokestacks, vents). May affect local air quality.

💧 Water Pollution (Last 10 Years)

564 lbs

High

Chemical discharges to surface water (bayous, streams, drainage) from industrial facilities within 2 miles over the past decade. May impact local waterways and drainage systems.

❤️ 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.

Period	Total	Air	Water
Typical Houston Property (2014-2024)	6,524 lbs	4,822 lbs	0 lbs
This Property (2014-2024)	482,261 lbs	455,694 lbs	564 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	149,167 lbs	40,953 lbs	63 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

70-79th

5.8%

80-89th

4.3%

90-100thLowest Pollution

34.2%

Higher pollution than 75% 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 25% most polluted).

Top chemicals released near this property (past 10 years):

1,2,4-Trimethylbenzene, Xylene (mixed isomers), n-Butyl alcohol, Certain glycol ethers, n-Hexane

View the full list of 32 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (32 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	1,2,4-Trimethylbenzene	95-63-6	132,436	2	135,230
2	Xylene (mixed isomers)	1330-20-7	76,361	17	83,842
3	n-Butyl alcohol	71-36-3	66,696	0	66,696
4	Certain glycol ethers	N230	36,286	0	36,286
5	n-Hexane	110-54-3	28,628	0	31,071
6	Naphthalene	91-20-3	21,982	1	24,148
7	Cyclohexane	110-82-7	17,867	0	23,451
8	Toluene	108-88-3	19,162	92	22,395
9	Ethylbenzene	100-41-4	16,670	4	17,516
10	Benzene	71-43-2	11,261	84	12,917
11	1,3-Butadiene	106-99-0	12,796	0	12,796
12	Methanol	67-56-1	5,968	0	5,968
13	Styrene	100-42-5	2,528	0	2,528
14	Methyl tert-butyl ether	1634-04-4	2,304	0	2,304
15	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	1,236	41	1,277
16	Chromium	7440-47-3	879	102	981
17	Hydrogen sulfide	7783-06-4	726	0	726
18	Ethylene glycol	107-21-1	560	0	560
19	Nickel	7440-02-0	386	106	492
20	tert-Butyl alcohol	75-65-0	272	0	272
21	Antimony compounds	N010	235	0	235
22	Vinyl acetate	108-05-4	215	0	215
23	Cumene	98-82-8	107	0	108
24	Copper	7440-50-8	15	43	58
25	Manganese	7439-96-5	24	22	46
26	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0	40	40
27	Dicyclopentadiene	77-73-6	34	0	34
28	Lead compounds	N420	25	4	29
29	Methyl methacrylate	80-62-6	13	0	13
30	Tetrachloroethylene	127-18-4	10	0	10
31	Trichloroethylene	79-01-6	10	0	10
32	Lead	7439-92-1	3	7	10

Top chemicals released near this property (2024 only):

Styrene, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region), n-Butyl alcohol, Xylene (mixed isomers), 1,2,4-Trimethylbenzene

View the full list of 22 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (22 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Styrene	100-42-5	30	0	78,726
2	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	0	11	15,941
3	n-Butyl alcohol	71-36-3	9,458	0	15,029
4	Xylene (mixed isomers)	1330-20-7	6,673	0	9,293
5	1,2,4-Trimethylbenzene	95-63-6	7,218	0	7,218
6	n-Hexane	110-54-3	4,110	0	4,110
7	Naphthalene	91-20-3	2,703	0	4,093
8	Methyl methacrylate	80-62-6	1	0	3,658
9	Certain glycol ethers	N230	2,726	0	2,726
10	Toluene	108-88-3	2,332	0	2,455
11	Benzene	71-43-2	1,563	0	1,645
12	Ethylbenzene	100-41-4	1,613	0	1,631
13	Cyclohexane	110-82-7	1,189	0	1,244
14	1,3-Butadiene	106-99-0	433	0	433
15	Methyl tert-butyl ether	1634-04-4	354	0	354
16	Vinyl acetate	108-05-4	205	0	205
17	Chromium	7440-47-3	136	32	167
18	Methanol	67-56-1	115	0	115
19	Nickel	7440-02-0	36	20	57
20	Dicyclopentadiene	77-73-6	34	0	34
21	Cumene	98-82-8	25	0	27
22	Lead And Lead Compounds	N420	0	0	7