Drinking water quality, Trøndelag

38 cities covered · 0 with a PFAS result · 0 with a quantified value · 38 with no published PFAS result · PFAS-4 not published

Each municipality shows annual figures from Mattilsynet's register: for the largest active water supply system with analyses from the latest or the previous year, the year's median per parameter, the year's maximum alongside (and the minimum for pH); the other systems are listed with their residents. A value counts as a breach only when the waterworks reported a sample above the limit to the register; a maximum above the limit that the register did not count as a deviation is marked amber. PFAS is not yet published per system; the Sum-4 PFAS limit of 4 ng/L applies since 1 January 2026 and the first annual figures are due 15 February 2027.

This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.