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The map below shows the current highest ozone 1-hour levels measured in parts per billion (ppb) for each of the metropolitan or other areas across Indiana where ozone is measured by the IDEM. More detailed maps showing the current 1-hour ozone levels measured at each site in a particular area are available by clicking on the boxes on the map. These levels are based on data measured at the IDEM's continuous air monitoring stations and may include data from local governments and private monitoring networks.
The latest imagery available is for Sunday April 30, 2017 11-12:00 EDT.
Hourly ozone levels have been mapped to a set of surrogate values based on custom 1-hour breakpoints.
The table below shows the levels, color-coding, and suggested actions for the 1-hour surrogate.
|Ozone levels in this range are projected to be healthy based on the one-hour surrogate calculation for Ozone.
PLEASE NOTE: This data has not been verified by the IDEM and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from IDEM ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.