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The Salmon Ledger
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Disease case · Infectious salmon anaemia (ISA)

ISA at Purkholmen

Site 45198 · Nærøysund municipality · Trøndelag · Salmar Oppdrett AS. Production area: Nord-Trøndelag med Bindal.

  1. Suspected15 May 2026Food Safety Authority
  2. Confirmed22 May 2026Food Safety Authority
  3. Closednot yetRequires the farm to be emptied and fallowed
Follow the farmAbout the wellboat analysis
  • 139Days since suspicionAs of 01 Oct 2026
  • 7Wellboat visits up to 28 days before, from 2 vesselsCoastal Administration (AIS) · 01 Oct 2026
  • 0Of them from a boat recently at a farm with ISA/PDWithin 14 days before the visit · The Salmon Ledger
  • 0Other farms with active ISA within 10 km at suspicionNorwegian Food Safety Authority · 01 Oct 2026

Wellboat visits before suspicion

The 28 days before the case started (suspected 15 May 2026). Each mark is one visit. A triangle means the boat had, in the previous 14 days, been at another farm with active ISA or PD, or in a protection zone. Visits after suspicion are not included.

VisitCame from a farm with ISA/PDPrevious farm unknown (no recorded stop in 14 days)

Sources: Coastal Administration (AIS), Food Safety Authority (cases, and zones via BarentsWatch) · visits derived by The Salmon Ledger · updated 01 Oct 2026

Visits in the 28 days before suspicion

DateVesselDurationCame from (last stop)Status there
15 May 2026Ronja Ocean52 minMarøyaNo known ISA/PD
13 May 2026Ronja Ocean2 h 11 minTernskjæret IINo known ISA/PD
05 May 2026Ronja Naeroeysund1 h 44 minBondøyaNo known ISA/PD
03 May 2026Ronja Naeroeysund2 h 27 minBondøyaNo known ISA/PD
19 Apr 2026Ronja Ocean18 h 16 minStasøyaNo known ISA/PD
18 Apr 2026Ronja Ocean17 h 15 minStasøyaNo known ISA/PD
17 Apr 2026Ronja Ocean14 h 19 minStasøyaNo known ISA/PD