Quality of greywater from an urban city district and treated effluent from an outdoor green wall in Helsingborg

The dataset presented here consists of raw data on the quality of influent greywater generated from an urban city district (1000 persons approx.) in Helsingborg, Sweden and the effluent quality of greywater after treatment using an outdoor green wall. A total of 8 samples of influent and effluent greywater were taken between October 2023 and June 2024, in different months to assess seasonal variations. The analyzed parameters include organic matter (e.g. TSS, BOD, COD, TOC), total nitrogen, total phosphorus, salt, and microorganisms (E. coli, enterococci, Clostridium perfringens, Legionella spp, Pseudomonas aeruginosa, and Campylobacter). Supporting parameters e.g. turbidity, pH, and conductivity are also included in the dataset. Files 1. Study_Description: This file includes the summary of the research study, data collection and the standard analytical methods used for analyzing different parameters. 2. Greywater_quality: The influent and effluent concentrations of all parameters analyzed during all sampling campaings.