Home > Analysis: 420 Finfrock St, Pasadena, TX 77506 05/08/2025

📊 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

420 FINFROCK ST PASADENA 77506

Building Size

1,400 sqft

Total structure area from HCAD building records.

Elevation

24.05 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: 14.05 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 90% 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)

8.98 million lbs

Extremely High

1375.7x more than typical Houston property
≈ 449 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)

8.9 million lbs

Extremely High

1844.9x 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)

69 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)	8,975,740 lbs	8,896,628 lbs	69,471 lbs
Typical Houston Property (2024 Only)	2 lbs	1 lbs	0 lbs
This Property (2024 Only)	654,287 lbs	535,676 lbs	991 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 90% 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):

Styrene, Ammonia, Propylene, n-Hexane, Hydrogen cyanide

View the full list of 47 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (47 chemicals)

#	Chemical	CAS#	Air (lbs, 10yr)	Water (lbs, 10yr)	Total (lbs, 10yr)
1	Styrene	100-42-5	1,724,969	7,271	1,732,240
2	Ammonia	7664-41-7	1,203,746	26,223	1,229,969
3	Propylene	115-07-1	1,208,542	0	1,208,542
4	n-Hexane	110-54-3	1,088,179	0	1,088,598
5	Hydrogen cyanide	74-90-8	1,032,286	0	1,032,286
6	Xylene (mixed isomers)	1330-20-7	407,994	723	411,077
7	Ethylene	74-85-1	370,774	0	370,774
8	Benzene	71-43-2	295,713	477	296,754
9	Toluene	108-88-3	287,428	260	288,569
10	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	7664-93-9	250,113	0	250,113
11	Hydrogen sulfide	7783-06-4	244,215	0	244,216
12	1,3-Butadiene	106-99-0	226,177	1	226,178
13	n-Butyl alcohol	71-36-3	137,606	0	137,606
14	Diethanolamine	111-42-2	102,160	0	102,160
15	Cyclohexane	110-82-7	66,580	0	67,349
16	Methanol	67-56-1	63,649	0	63,649
17	Ethylbenzene	100-41-4	60,168	102	60,870
18	Propionaldehyde	123-38-6	31,241	0	31,241
19	Butyraldehyde	123-72-8	22,150	0	22,150
20	Nitrate compounds (water dissociable; reportable only when in aqueous solution)	N511	0	21,954	21,954
21	Naphthalene	91-20-3	20,014	75	21,419
22	Dicyclopentadiene	77-73-6	14,013	0	14,013
23	1,2,4-Trimethylbenzene	95-63-6	11,118	0	11,536
24	Sodium nitrite	7632-00-0	0	9,470	9,470
25	Cumene	98-82-8	8,769	0	8,953
26	Biphenyl	92-52-4	5,161	0	5,502
27	Ethylene glycol	107-21-1	5,255	0	5,264
28	Isobutyraldehyde	78-84-2	4,080	0	4,080
29	Polycyclic aromatic compounds	N590	2,887	525	3,613
30	Zinc compounds	N982	219	1,181	2,891
31	Phenol	108-95-2	0	1,155	1,155
32	Chlorine	7782-50-5	388	0	388
33	Hydrogen fluoride	7664-39-3	229	0	299
34	Mercury compounds	N458	165	1	166
35	Nickel	7440-02-0	120	0	120
36	Mercury	7439-97-6	106	0	106
37	Mercury And Mercury Compounds	N458	97	0	97
38	Certain glycol ethers	N230	80	0	80
39	Manganese	7439-96-5	70	0	70
40	Isoprene	78-79-5	60	0	60
41	Lead compounds	N420	6	46	52
42	Chromium	7440-47-3	40	0	40
43	C.I. Food Red 15	81-88-9	40	0	40
44	Chromium compounds (except for chromite ore mined in the Transvaal Region)	N090	11	0	11
45	Benzo[g,h,i]perylene	191-24-2	3	7	11
46	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	8	0	8
47	Lead And Lead Compounds	N420	2	1	3

Top chemicals released near this property (2024 only):

Styrene, Ammonia, Diethanolamine, Hydrogen cyanide, n-Hexane

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	Styrene	100-42-5	130,785	291	131,077
2	Ammonia	7664-41-7	111,684	78	120,068
3	Diethanolamine	111-42-2	10,092	0	85,621
4	Hydrogen cyanide	74-90-8	73,728	0	73,728
5	n-Hexane	110-54-3	41,391	0	41,424
6	Xylene (mixed isomers)	1330-20-7	34,944	20	35,285
7	Propylene	115-07-1	34,344	0	34,344
8	Toluene	108-88-3	21,164	6	21,273
9	Benzene	71-43-2	19,886	112	20,570
10	Zinc compounds	N982	22	32	19,978
11	Ethylene	74-85-1	17,246	0	17,246
12	Hydrogen sulfide	7783-06-4	14,345	0	14,345
13	1,3-Butadiene	106-99-0	13,691	0	13,691
14	Ethylene glycol	107-21-1	500	0	7,519
15	Cyclohexane	110-82-7	4,171	0	4,189
16	Ethylbenzene	100-41-4	3,987	5	4,037
17	Phenol	108-95-2	0	8	2,825
18	Naphthalene	91-20-3	1,359	7	1,445
19	1,2,4-Trimethylbenzene	95-63-6	1,267	0	1,408
20	Certain glycol ethers	N230	10	0	1,121
21	Nickel And Nickel Compounds	N495	0	0	915
22	Cumene	98-82-8	531	0	532
23	Polycyclic aromatic compounds	N590	354	55	409
24	Lead And Lead Compounds	N420	0	0	404
25	Sodium nitrite	7632-00-0	0	371	371
26	Lead compounds	N420	0	0	269
27	Biphenyl	92-52-4	33	0	33
28	Manganese	7439-96-5	30	0	30
29	Chlorine	7782-50-5	25	0	25
30	Chromium	7440-47-3	25	0	25
31	Nickel	7440-02-0	24	0	24
32	Mercury And Mercury Compounds	N458	21	0	23
33	Lead	7439-92-1	0	0	8
34	Isoprene	78-79-5	8	0	8
35	Mercury	7439-97-6	7	0	7
36	Benzo[g,h,i]perylene	191-24-2	0	5	5
37	Vanadium (except when contained in an alloy)	7440-62-2	0	0	3
38	Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)	N090	2	0	3