Gryaab (2016) Gryaab. 2016. Referensprovtagning 2014/2015. Provtagningsstationer. Gryaab Rapport 2015:9. Version 2, uppdaterad 2016-03-18. The overflow water concentration were taken from measurements from the sewage treatment plant Ryaverket, measuring station Kodammarna. Mean value from 7 daily samples, 2014-10-06 - 2015-10-12.