Summary:

Ecological sites and their data included in official registers are the subject of the paper. While comparing the total area of ecological sites in The Land and Building Register (EGiB) (the state for January 1, 2012) in zachodniopomorskie voivodeship with the data on various forms of environmental protection included in the same source, one can notice big discrepancies. The first data mentions the area of 4 328 ha, the other ones - 6 424 ha. One of the purposes of the paper is to check whether similar discrepancies occur in Koszalin Province and City of Koszalin.
The aim of the research, whose results are presented in the paper, was to show and evaluate discrepancies between various registers on the local level containing quantitative and area data of ecological sites. The main source of information used was the register of Regional Director of Protection of Environment (RDOŚ) and EGiB. The area of Koszalin province and Koszalin itself was the object of the research. The data collected for October 1, 2013 and quantitative and qualitative analysis of documents and area analysis were used.
The conducted analyses resulted in pointing out deficiencies and discrepancies in both registers and evaluating numbers and areas of ecological sites which were not included in EGiB. It was stated that for the area of Koszalin Province and City of Koszalin EGiB did not register ecological sites of 3-7% of their total area. A necessity to complete and verify data in both registers and a possibility to use detailed data on ecological sites from EGiB for evaluation and analyses were also pointed out.