Due to disorganised healthcare system an overload of workforce was noted in the Emergency Services in Istrian county that encouraged us to research how much does the aforementioned services work outside their extent. The research was done based on the data from the Teaching Institute for Public Health in Istrian county from 2017 to 2019. Results have been statistically processed by a T-test with the prepared data, and are corroborated with tables and charts. The research has proved that during the tourist season and weekends we have a significant increase which includes interventions on the field and ambulance examinations. We have an increase in interventions and ambulance examinations during the months of June, July, August and September compared to the rest of the year, and during Saturday and Sunday compared to the rest of the week. With the total number of interventions we have come to a conclusion that the majority of work is outside the extent of Emergency Services in Istrian county. Key words: Emergency Services, extent of work, Istrian county which greatly burdens the budget of the Republic of Croatia.