Individual allergy index (IAI) chart card with background

Who it’s for

Allergy sufferers, public health managers, and outdoor event organizers ask “what is the allergy index right now and has it been rising — with the current risk level visible from across the room?” The background-color chart variant combines real-time trend visibility with high-contrast room-level risk communication.

What it does

A sensor reporting IAI_level = 4.1 displays the current index and a historical trend chart on a card whose background fills with the risk color: green for Good (0–2), light green for Moderate (2–6), orange for Elevated (6–9), and red for Hazardous (above 9).

• Full-card background color communicates allergy risk at a glance from a distance
• Historical trend chart shows how the index has evolved over the selected time window
• Shows one sensor’s data per widget; add multiple widgets to track locations across a network

How to set up

Data keys

Key	Role	Type	Description
IAI_level	Chart series	Timeseries	Individual Allergy Index value (unitless); change the key name to match your device’s telemetry key
Latest	Latest value	Timeseries	The headline figure above the chart. Its own color ranges are where the band colors are edited
Delta percent	Percentage change	Timeseries	Change against the previous period, as a percentage
Delta absolute	Absolute change	Timeseries	Change against the previous period, in the key’s own unit

The widget ships with a simulated function datasource key labeled Individual Allergy Index, so it draws random values until you point the datasource at a device and rename the key.

To point it at your own device: open the dashboard in edit mode, open the widget’s Datasources, pick the entity or entity alias, and replace the function key with the key your device reports.

Value ranges

Range	Level	Color
0–2	Good	Green
2–6	Moderate	Light Green
6–9	Elevated	Orange
9+	Hazardous	Red

How to customize

• To change the severity thresholds — edit the color ranges on the Latest data key to match your local allergy forecast standards.
• To change the band colors — edit the background color for each severity level in the widget settings.
• To change the time window — adjust the dashboard time filter to show the last hour, day, or week of IAI readings.

Tips

• On a public information display, the colored background signals the risk level from a distance while the embedded chart shows whether conditions are improving or worsening.
• Use consistent severity colors across all air quality and allergy widgets so the same background color means the same level of risk regardless of which index is displayed.
• IAI often peaks in late morning; a chart showing the previous 24 hours helps managers decide whether to issue or rescind a public advisory.