Citizen Science Center - (Air Sensor Sampling)
- Purple Air data should be viewed as informal and of limited usefulness at this time.
- The Purple Air realtime data display is discontinued until correction factors can be developed and applied to the Purple Air data.
EPA - Air Sensor Toolbox
These lower cost sensors currently operating at the Polk County Rollins site don't meet the strict EPA requirements for NAAQS compliance determinations. Understanding the strengths and limitations of an air sensor is important in making sure the data collected is useful for the intended purpose. This site is intended for informal air quality awareness and aimed at discovering insight about air sensor technology and applications.
Health Effects Note: Consistent health effects messaging requires comparability between the Purple Air and Federal Equivalent Method (FEM) BAM sensors. The lack of comparability between the Purple Air data and FEM-BAM data should be noted and the Purple Air data should be viewed as informal and of limited usefulness until corrections can be developed and applied to the Purple Air data.
National Association of Clean Air Agencies (NACAA)
NACAA: 4yi Sensor Fact Sheet
Location: 6011 Rollins Avenue, Des Moines - Iowa