The groundwater levels in individual and small reservoirs are much below normal for the season and the levels for larger reservoirs are below normal. The rainfall over the past three months has been much below normal, for Visby only 62 millimeters compared to normally 127 millimeters (source SMHI).
Irrigation bans are now being introduced in Burs, Stenkyrka, Kappelshamn, Slite and at Fårö. What places that have previously been banned from irrigation can be seen in this article: Irrigation bans are introduced on parts of Gotland