Box 1.

Explanations of acronyms used in the article

Acronym	Definition
ANC	Acid neutralizing capacity
BCS_ANC	Estimated base cation surplus acid neutralizing capacity (Eq. 3)
CB_ANC	Estimated charge balance acid neutralizing capacity (Eq. 1)
DOC	Dissolved organic carbon
IKEU	Integrerad kalkningseffektuppföljning—liming studies
MAGIC	Model of acidification of groundwater in catchments
OAA_ANC	Estimated organic acid adjusted acid neutralizing capacity (Eq. 2)
SEPA	Swedish Environmental Protection Agency
SQL	Structured Query Language
TOC	Total organic carbon
UNECE	United Nations Economic Commission for Europe
USEPA	United States Environmental Protection Agency
SD	Site density