Hello and apologies for just seeing this. I’ve detailed graph range limitations below. These are based on the Averaging period you choose on the map.
| Averaging period | Graph range |
|---|---|
| Real-time | 2 days |
| 10-minute | 3 days |
| 30-minute | 7 days |
| 1-hour | 14 days |
| 6-hour | 90 days |
| 1-day | 1 year |
| 1-week | 5 years |
| 1-month | 20 years |
| 1-year | 100 years |
If you’re not sure how to change the Averaging period, you can refer to this article: PurpleAir Map Guide. Hope that helps!