Mission Statement
  & Core Values

District Information
Directions
Staff Directory
FAQ
General Contacts
Governing Board
News & Press Releases
Office Hours
Valley Air Newsletter
Videos
Ag Permits/Conservation
 Management Practices(CMP)

Ag Burning
Dairy Permitting
Smoke Management System
Weed Abatement Burning
File a Complaint
Smoking Vehicles
Wood Burning Forecast
Air Alerts
Air Quality Info
Daily Forecast
Exceptional Events
Real-Time Air Advisory
 Network (RAAN)

Web-based Archived Air Quality (WAAQ) System
Carbon Monoxide
Emission Inventory
Fast Track Strategy
Health Risk-Reduction Strategy
Ozone Plans
Particulate Matter Plans
Make a Payment
Small Business Assistance
eTrip
Requests for Proposals (RFPs)
Abrasive Blasting
Asbestos
Breakdowns
Certified Equipment
Compliance Assistance
 Bulletins

Dust Control
Fireplaces, Stoves,
 and Heaters

Gasoline Dispensing (GDF)
Hazard Reduction Burning
INSPECT Program
Notice of Violation (NOV)
Policies/Guidance Documents
Prescribed Burning
Record Keeping Forms
Solvent Degreasing
Source Testing
State Portable Equipment
Title V Operating Permits
Training Schedule
Variances
Weed Abatement Burning
Calendar Contest
Activity Kit
Healthy Air Living Schools
Games and Activities
Real-Time Air Advisory
 Network (RAAN)

Budget & Financial
Email Lists
Information & Documents
Request A Speaker
Public Records Requests
California Environmental
 Quality Act (CEQA)

Climate Change Action Plan
Demolition Permit Release
Guidelines for General Plans
Indirect Source Review
Emissions/Air Quality Models
Air Quality Mitigation
Transportation
Air Quality Modeling
Air Toxics
Emission Factor
Emissions Inventory
Resources
Make Payments
Application Forms
Air Toxics
Ag Permits/Conservation
 Management Practices(CMP)

Best Available Control
 Technology (BACT)

Best Performance
 Standard (BPS)

Dairy Permitting
Drought Relief Actions
Emission Reduction
 Credits(ERC)

eTrip
General Permitting Info
Permit-Exempt Equipment
 Registration (PEER)

Portable Equipment
Public Notification
Small Business Assistance
Title V Operating Permits
Citizens Advisory Committee
Conferences
Environmental Justice
  Advisory Group

Governing Board
Hearing Board
Special City Selection
  Committee

Study Agency
Workshops & Hearings
Webcasts
Email Lists
Healthy Air Living
Public Notices
Public Records Release  Request
Receive Permit Notice
Workshops & Hearings
Current Rules
Recent Actions
Rules Main
Rules Under Development
File a Complaint
Healthy Air Living
Learn About Air Pollution
Upcoming Events
Wood Burning
Search:
Particulate Matter (PM) Definition

Particulate matter (PM) pollution is a serious health issue in the San Joaquin Valley Air Basin (SJVAB). Particulate matter is a generic term used to describe a complex group of air pollutants that vary in size and composition, depending upon the location and time of its source. The PM mixture of fine airborne solid particles and liquid droplets (aerosols) include components of nitrates, sulfates, elemental carbon, organic carbon compounds, acid aerosols, trace metals, and geological material. Some aerosols are formed in the atmosphere from gaseous combustion by-products such as volatile organic compounds (VOCs), oxides of sulfur (SOx) and nitrogen oxides (NOx). The size of PM can vary from coarse wind blown dust particles to fine particles directly emitted or formed from chemical reactions occurring in the atmosphere. PM10 comprises particles with an aerodynamic diameter less than or equal to a nominal 10 microns. PM2.5 comprises particles with an aerodynamic diameter less than or equal to a nominal 2.5 microns. The official term is micrometer or one millionth of a meter, however, micron is still in common use.

For questions associated with this page.
Please Email us.