Water samples were collected and physical-chemical parameters measured from the surface water of Pohjanpitäjänlahti bay in May 2021 from four stations along a coastal salinity gradient. Temperature and conductivity were measured with field meters and chlorophyll-a spectrophotometrically from the water samples and total particulate matter from filtering the water samples through 0,7 um filters. The samples were collected 8 times straight to plastic bottles from a small boat. The data was collected to a thesis funded by Walter and Andreé de Nottbeck Foundation.

Conductivity and temperature were measured from 0,5 m depth with either:- YSI Pro Solo DO meter, YSI Inc., Yellow Springs, OH, USA (on 10 May) or- CO310 Conductivity meter, VWR, Radnor, PA, USA (other sampling times)