Home > Analysis: 3302 Dartmouth Dr, Pasadena, TX 77503 04/11/2025

📊 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

3302 DARTMOUTH DR PASADENA 77503

Building Size

1,698 sqft

Total structure area from HCAD building records.

Elevation

30.53 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: 20.53 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

High

Higher pollution than 85% 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)

2.49 million lbs

Extremely High

381.5x more than typical Houston property
≈ 124 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)

1.43 million lbs

Extremely High

296.9x 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)

1.06 million 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)	2,488,842 lbs	1,431,680 lbs	1,057,131 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	253,986 lbs	137,100 lbs	73,522 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 85% 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 15% most polluted).

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

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Methanol, Acetophenone, Vinyl chloride, Acetaldehyde

View the full list of 43 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (43 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	1,038,744	1,038,744
2	Methanol	67-56-1	450,674	7,563	458,237
3	Acetophenone	98-86-2	206,492	3,645	210,136
4	Vinyl chloride	75-01-4	166,976	14	166,990
5	Acetaldehyde	75-07-0	98,856	3,956	102,812
6	Ammonia	7664-41-7	97,313	2,681	99,994
7	Cumene	98-82-8	84,247	11	84,259
8	Vinyl acetate	108-05-4	70,754	0	70,754
9	Xylene (mixed isomers)	1330-20-7	45,323	33	45,365
10	Ethylene	74-85-1	40,183	0	40,183
11	1,2,4-Trimethylbenzene	95-63-6	36,587	105	36,695
12	Toluene	108-88-3	29,713	27	29,749
13	n-Hexane	110-54-3	20,905	170	21,076
14	Boron trifluoride	7637-07-2	14,388	0	14,388
15	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	13,465	0	13,465
16	Benzene	71-43-2	11,221	24	11,247
17	Dimethylamine	124-40-3	6,912	0	6,912
18	Chlorine	7782-50-5	6,383	0	6,383
19	Ethylbenzene	100-41-4	5,951	22	5,975
20	Phenol	108-95-2	5,078	0	5,078
21	Zinc compounds	N982	4,126	0	4,126
22	Formaldehyde	50-00-0	3,141	0	3,141
23	Ethylene glycol	107-21-1	2,254	0	2,254
24	Acrylonitrile	107-13-1	2,224	0	2,224
25	Propylene oxide	75-56-9	1,829	0	1,829
26	o-Cresol	95-48-7	1,585	0	1,585
27	Formic acid	64-18-6	1,406	0	1,406
28	Maleic anhydride	108-31-6	1,009	0	1,009
29	Cyclohexane	110-82-7	995	0	995
30	Naphthalene	91-20-3	935	21	957
31	1,3-Butadiene	106-99-0	312	0	312
32	Diethanolamine	111-42-2	205	0	205
33	Diphenylamine	122-39-4	118	0	118
34	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
35	Chromium	7440-47-3	0	33	33
36	Nickel	7440-02-0	0	31	31
37	Lead And Lead Compounds	N420	3	22	25
38	Lead compounds	N420	1	22	22
39	Certain glycol ethers	N230	12	0	12
40	Methyl tert-butyl ether	1634-04-4	2	5	10
41	Polycyclic aromatic compounds	N590	2	2	4
42	Piperonyl butoxide	51-03-6	4	0	4
43	Mercury And Mercury Compounds	N458	1	0	1

Top chemicals released near this property (2024 only):

Nitrate compounds (water dissociable; reportable only when in aqueous solution), Methanol, Ethylene, Ammonia, Acetophenone

View the full list of 38 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (38 chemicals)

#	Chemical	CAS#	Air (lbs/yr)	Water (lbs/yr)	Total (lbs/yr)
1	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	72,435	72,435
2	Methanol	67-56-1	19,060	336	46,187
3	Ethylene	74-85-1	30,650	0	30,650
4	Ammonia	7664-41-7	11,128	0	19,596
5	Acetophenone	98-86-2	17,719	350	18,069
6	Vinyl chloride	75-01-4	13,207	1	13,208
7	Acetaldehyde	75-07-0	8,345	380	8,725
8	Cumene	98-82-8	7,173	0	7,277
9	Vinyl acetate	108-05-4	5,850	0	5,852
10	1,2,4-Trimethylbenzene	95-63-6	4,000	0	4,520
11	n-Hexane	110-54-3	4,280	0	4,280
12	Xylene (mixed isomers)	1330-20-7	3,675	5	3,785
13	Phenol	108-95-2	2,206	0	3,579
14	Formaldehyde	50-00-0	354	0	3,326
15	Toluene	108-88-3	2,900	3	2,903
16	Formic acid	64-18-6	189	0	1,968
17	Boron trifluoride	7637-07-2	1,178	0	1,178
18	Benzene	71-43-2	1,130	2	1,132
19	o-Cresol	95-48-7	88	0	1,122
20	Dimethylamine	124-40-3	864	0	884
21	Chlorine	7782-50-5	487	0	487
22	Ethylbenzene	100-41-4	427	3	430
23	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7647-01-0	395	0	395
24	Zinc compounds	N982	323	0	323
25	1,3-Butadiene	106-99-0	295	0	295
26	Acrylonitrile	107-13-1	278	0	294
27	Maleic anhydride	108-31-6	132	0	281
28	Propylene oxide	75-56-9	255	0	255
29	Cyclohexane	110-82-7	232	0	232
30	Naphthalene	91-20-3	132	1	133
31	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	96	0	96
32	Ethylene glycol	107-21-1	30	0	50
33	Diphenylamine	122-39-4	23	0	23
34	Chromium	7440-47-3	0	2	8
35	Nickel	7440-02-0	0	2	6
36	Lead And Lead Compounds	N420	1	1	1
37	Certain glycol ethers	N230	1	0	1
38	Polycyclic aromatic compounds	N590	0	0	1