Data on occurrence of perfluoroalkyl substances in influents and effluents collected from different wastewater treatment plants in Latvia

The data set provided in this paper contains occurrence data of 17 perfluoroalkyl substances (PFAS) (including 10 perfluorinated carboxylic acids and 7 perfluorinated sulfonic acids) in influent and effluent samples collected from 43 wastewater treatment plants (WWTPs) located in different cities in Latvia. Samples were collected in the period June-July 2021. In each WWTP one influent and one effluent sample were collected on the same day. Extraction and clean-up of the samples were performed using solid phase extraction (SPE) on a weak-anion SPE phase. Observed extracts were analysed using high performance liquid chromatography coupled with Orbitrap high resolution mass spectrometry (HPLC-Orbitrap-MS) on the content of selected PFAS representatives. The collected data are with fundamental scientific value and can be applied for local data analysis. The data set is useful for the estimation of overall background levels of PFAS and evaluation of local city WWTPs wastewater remediation efficiency towards the removal of PFAS contamination.