Home > Analysis: 1426 Rancho Grande Dr, Houston, TX 77049 09/12/2025

📊 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

1426 RANCHO GRANDE DR HOUSTON 77049

Building Size

2,259 sqft

Total structure area from HCAD building records.

Elevation

35.6 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: 25.6 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

Very High

Higher pollution than 96% 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)

49.48 million lbs

Extremely High

7584.4x more than typical Houston property
≈ 2.5K 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)

10.67 million lbs

Extremely High

2212.4x 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)

18 thousand lbs

Extremely 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)	49,482,994 lbs	10,669,027 lbs	18,484 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	3,004,927 lbs	1,135,932 lbs	1,258 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 96% 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):

Methanol, Ethylbenzene, Acetophenone, Styrene, 1,3-Butadiene

View the full list of 57 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (57 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Methanol	67-56-1	482,434	0	20,434,430
2	Ethylbenzene	100-41-4	774,407	0	6,643,176
3	Acetophenone	98-86-2	147,704	0	6,062,474
4	Styrene	100-42-5	484,317	0	2,936,528
5	1,3-Butadiene	106-99-0	1,885,935	0	1,885,935
6	Allyl alcohol	107-18-6	56,687	0	1,530,217
7	Benzene	71-43-2	854,109	89	1,151,242
8	Propylene	115-07-1	1,006,756	0	1,006,756
9	Propylene oxide	75-56-9	748,088	0	821,764
10	Ammonia	7664-41-7	796,916	9,735	806,651
11	Phenol	108-95-2	2,427	0	742,109
12	Acetonitrile	75-05-8	373,837	0	726,784
13	Ethylene	74-85-1	698,385	0	698,385
14	Acetaldehyde	75-07-0	587,542	0	587,542
15	tert-Butyl alcohol	75-65-0	108,935	0	557,508
16	Toluene	108-88-3	247,002	0	503,191
17	n-Butyl alcohol	71-36-3	3,752	0	466,313
18	N-Methyl-2-pyrrolidone	872-50-4	2,753	0	427,839
19	Naphthalene	91-20-3	292,176	0	292,176
20	Methyl tert-butyl ether	1634-04-4	230,136	0	251,110
21	n-Hexane	110-54-3	217,285	0	217,285
22	Isoprene	78-79-5	159,549	0	159,549
23	Cumene	98-82-8	94,706	0	125,192
24	Tetrachloroethylene	127-18-4	105,005	0	105,005
25	Xylene (mixed isomers)	1330-20-7	99,754	0	103,690
26	1,2,4-Trimethylbenzene	95-63-6	57,877	0	57,877
27	Dicyclopentadiene	77-73-6	51,191	0	51,191
28	Propionaldehyde	123-38-6	13,598	0	36,618
29	Ethylene oxide	75-21-8	26,715	0	26,715
30	Chlorine	7782-50-5	15,020	0	15,020
31	Molybdenum trioxide	1313-27-5	10,461	0	10,461
32	Cyclohexane	110-82-7	7,975	0	7,975
33	Cyclohexanol	108-93-0	5,782	0	5,782
34	Maleic anhydride	108-31-6	5,323	0	5,323
35	Phenanthrene	85-01-8	3,788	0	3,788
36	Copper compounds	N100	0	3,694	3,694
37	Furan	110-00-9	2,941	0	2,941
38	Crotonaldehyde	4170-30-3	2,750	0	2,750
39	Nickel	7440-02-0	0	2,508	2,508
40	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	356	960	1,316
41	Vinyl acetate	108-05-4	1,161	0	1,161
42	sec-Butyl alcohol	78-92-2	948	0	948
43	Copper And Copper Compounds	N100	0	917	917
44	Formic acid	64-18-6	703	0	703
45	Anthracene	120-12-7	700	0	700
46	Acrolein	107-02-8	445	0	445
47	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	160	282	442
48	Lead	7439-92-1	38	299	337
49	1,2-Butylene oxide	106-88-7	164	0	164
50	Barium And Barium Compounds	N040	125	0	125
51	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	N040	125	0	125
52	Mercury	7439-97-6	22	0	55
53	Polycyclic aromatic compounds	N590	35	0	35
54	Dioxin and dioxin-like compounds	N150	18	0	18
55	Isobutyraldehyde	78-84-2	8	0	8
56	Certain glycol ethers	N230	1	0	1
57	Acetamide	60-35-5	1	0	1

Top chemicals released near this property (2024 only):

Methanol, Ethylbenzene, Acetophenone, 1,3-Butadiene, Benzene

View the full list of 50 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (50 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Methanol	67-56-1	46,154	0	762,818
2	Ethylbenzene	100-41-4	81,932	0	523,124
3	Acetophenone	98-86-2	10,585	0	370,956
4	1,3-Butadiene	106-99-0	226,767	0	226,767
5	Benzene	71-43-2	105,650	0	132,258
6	Propylene	115-07-1	126,126	0	126,126
7	Styrene	100-42-5	25,299	0	118,635
8	Acetonitrile	75-05-8	28,355	0	102,022
9	Propylene oxide	75-56-9	84,847	0	94,712
10	Ammonia	7664-41-7	92,037	826	92,863
11	Allyl alcohol	107-18-6	1,916	0	87,173
12	Acetaldehyde	75-07-0	58,529	0	58,529
13	Ethylene	74-85-1	46,945	0	46,945
14	Toluene	108-88-3	22,058	0	37,480
15	Methyl tert-butyl ether	1634-04-4	31,577	0	32,921
16	n-Hexane	110-54-3	28,863	0	29,003
17	Naphthalene	91-20-3	28,207	0	28,293
18	tert-Butyl alcohol	75-65-0	25,572	0	27,089
19	Isoprene	78-79-5	19,021	0	19,021
20	n-Butyl alcohol	71-36-3	169	0	14,730
21	Tetrachloroethylene	127-18-4	12,768	0	12,768
22	Xylene (mixed isomers)	1330-20-7	8,267	0	9,273
23	Phenol	108-95-2	154	0	6,862
24	Barium And Barium Compounds	N040	35	0	5,615
25	Nickel	7440-02-0	0	103	4,897
26	1,2,4-Trimethylbenzene	95-63-6	4,257	0	4,460
27	Dicyclopentadiene	77-73-6	4,111	0	4,130
28	Cumene	98-82-8	1,675	0	3,684
29	Molybdenum trioxide	1313-27-5	3,521	0	3,521
30	Ethylene oxide	75-21-8	3,097	0	3,097
31	N-Methyl-2-pyrrolidone	872-50-4	130	0	2,482
32	Propionaldehyde	123-38-6	726	0	2,467
33	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	31	2	1,802
34	Furan	110-00-9	1,574	0	1,574
35	Crotonaldehyde	4170-30-3	1,396	0	1,396
36	Copper And Copper Compounds	N100	0	263	1,371
37	Cyclohexane	110-82-7	1,366	0	1,366
38	Chlorine	7782-50-5	1,174	0	1,174
39	Vinyl acetate	108-05-4	353	0	360
40	Phenanthrene	85-01-8	253	0	356
41	Lead	7439-92-1	15	64	341
42	sec-Butyl alcohol	78-92-2	285	0	285
43	Anthracene	120-12-7	49	0	49
44	Mercury	7439-97-6	3	0	47
45	Formic acid	64-18-6	41	0	41
46	Acrolein	107-02-8	29	0	29
47	1,2-Butylene oxide	106-88-7	7	0	7
48	Isobutyraldehyde	78-84-2	4	0	4
49	Dioxin and dioxin-like compounds	N150	2	0	2
50	Polycyclic aromatic compounds	N590	1	0	1