NARSTO EPA_SS_HOUSTON TEXAQS2000 Washburn Tunnel Air Quality Monitoring Data

Gas and particle phase measurements collected in a Houston tunnel during the TexAQS2000 program from August 29 to September 1, 2000. The U.S. Environmental Protection Agency established the Houston Supersite to characterize particulate matter sources and composition in Southeastern Texas. Data includes nitrogen oxides, carbon dioxide, carbon monoxide, ammonia, PM2.5, and individual hydrocarbon species.

Use Cases

• Estimating vehicular emission factors based on gas and particle phase measurements collected in a tunnel.
• Analyzing the chemical composition of fine particulate matter (PM2.5) for source identification.
• Modeling atmospheric chemistry and pollutant behavior based on measurements of nitrogen oxides, carbon monoxide, and hydrocarbons.
• Supporting exposure and health effects studies with physical and chemical characterization data of fine particulate matter.

Strengths

• Measurements were collected on four consecutive days in August-September 2000, providing a focused temporal snapshot.
• Data includes multiple pollutant types: nitrogen oxides, carbon dioxide, carbon monoxide, ammonia, PM2.5, and hydrocarbons.
• Sampling was conducted during specific afternoon time periods (1200-1400 and 1600-1800 CDT) each day.

Limitations

• Row count and dataset scale are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data is from a single tunnel location over four days, which may limit geographic and temporal generalizability.

Provenance

Source

National Aeronautics and Space Administration via datagov, as part of the NARSTO and EPA Houston Supersite program.

Collection Method

In-situ monitoring and sampling conducted within the Washburn Tunnel.

Time Range

August 29, 2000 to September III, 2000.

Freshness

Last updated 2026-03-12 23:30:51.693714; freshness should be verified.

Geography

Houston area, Texas, United States.