Purkholmen

Site 45198 · Nærøysund municipality · Production area 7, Nord-Trøndelag med Bindal

Status unknown: not reported in week 39Operated by Salmar Oppdrett AS · group SalMar

unknownAdult female lice per fishNo count in week 39. Latest: 0.38 in week 23, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Weeks above the limit in 2026of 23 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

8Lice treatments in 2026Latest: Mechanical delousing, week 19, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Active disease casesILA, confirmed 22 May 2026Register since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

32Wellboat visits in 2026by 4 different vessels · latest 15 Jun 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

0Escapes reportedNone reportedSince 2006 · Directorate of Fisheries · updated 01 Oct 2026

Sea lice against the limit

Weekly average of adult female lice per fish, as reported by the company. For this site the limit is 0.2 in weeks 16–21 and 0.5 for the rest of the year. Hatched weeks have no count and count neither as above nor below.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

Show as table

Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.39	0.5	Below the limit
2	0.44	0.5	Near the limit
3	0.44	0.5	Near the limit
4	0.27	0.5	Below the limit
5	0.31	0.5	Below the limit
6	0.43	0.5	Near the limit
7	0.49	0.5	Near the limit
8	0.44	0.5	Near the limit
9	0.33	0.5	Below the limit
10	0.36	0.5	Below the limit
11	0.43	0.5	Near the limit
12	0.44	0.5	Near the limit
13	0.45	0.5	Near the limit
14	0.59	0.5	Above the limit
15	0.42	0.5	Near the limit
16	0.07	0.2	Below the limit
17	0.07	0.2	Below the limit
18	0.09	0.2	Below the limit
19	0.10	0.2	Below the limit
20	0.13	0.2	Below the limit
21	0.17	0.2	Near the limit
22	0.28	0.5	Below the limit
23	0.38	0.5	Below the limit
24	unknown	0.5	Not reported
25	unknown	0.5	Not reported
26	unknown	0.5	Not reported
27	unknown	0.5	Not reported
28	unknown	0.5	Not reported
29	unknown	0.5	Not reported
30	unknown	0.5	Not reported
31	unknown	0.5	Not reported
32	unknown	0.5	Not reported
33	unknown	0.5	Not reported
34	unknown	0.5	Not reported
35	unknown	0.5	Not reported
36	unknown	0.5	Not reported
37	unknown	0.5	Not reported
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported

Earlier years

20251 of 34 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

Show as table

Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	unknown	0.5	Not reported
12	unknown	0.5	Not reported
13	unknown	0.5	Not reported
14	unknown	0.5	Not reported
15	unknown	0.5	Not reported
16	unknown	0.2	Not reported
17	unknown	0.2	Not reported
18	unknown	0.2	Not reported
19	0.00	0.2	Below the limit
20	0.00	0.2	Below the limit
21	0.00	0.2	Below the limit
22	0.00	0.5	Below the limit
23	0.00	0.5	Below the limit
24	0.00	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.01	0.5	Below the limit
27	0.03	0.5	Below the limit
28	0.01	0.5	Below the limit
29	0.08	0.5	Below the limit
30	0.10	0.5	Below the limit
31	0.04	0.5	Below the limit
32	0.03	0.5	Below the limit
33	0.18	0.5	Below the limit
34	0.28	0.5	Below the limit
35	0.32	0.5	Below the limit
36	0.11	0.5	Below the limit
37	0.37	0.5	Below the limit
38	0.43	0.5	Near the limit
39	1.37	0.5	Above the limit
40	0.20	0.5	Below the limit
41	0.41	0.5	Near the limit
42	0.49	0.5	Near the limit
43	0.49	0.5	Near the limit
44	0.22	0.5	Below the limit
45	0.26	0.5	Below the limit
46	0.24	0.5	Below the limit
47	0.41	0.5	Near the limit
48	0.10	0.5	Below the limit
49	0.25	0.5	Below the limit
50	0.17	0.5	Below the limit
51	0.29	0.5	Below the limit
52	0.33	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 19, 2026
Mechanical delousing1 pen
Week 17, 2026
Other treatment, Mechanical delousing2 pens · FreshWell
Week 16, 2026
Other treatment5 pens · FreshWell
Week 15, 2026
Mechanical delousing2 pens

Show all 16

Week 14, 2026
Mechanical delousing1 pen
Week 4, 2026
Mechanical delousing6 pens
Week 3, 2026
Mechanical delousing2 pens
Week 50, 2025
Mechanical delousing2 pens
Week 48, 2025
Other treatment3 pens · FreshWell
Week 47, 2025
Other treatment3 pens · FreshWell
Week 44, 2025
Mechanical delousingWhole site
Week 43, 2025
Thermal delousingWhole site
Week 40, 2025
Mechanical delousing8 pens
Week 36, 2025
Mechanical delousing8 pens
Week 35, 2025
Other treatment4 pens · FreshWell
Week 31, 2025
Mechanical delousing3 pens

Disease

Norwegian Food Safety Authority

22 May 2026
Infectious salmon anaemia (ISA): confirmedStatus: active · started 15 May 2026 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

32 visits in 2026

Visits are derived by us from the Coastal Administration's AIS positions: a fish carrier stationary within 500 metres of the farm for at least 30 minutes. The AIS archive lags about 17 days. A visit is not proof of infection.

Arrival	Vessel	Previous farm (14 days)	Duration
15 Jun 2026	Ronja Ocean	Marøya	2 h 57 min
12 Jun 2026	Ronja Ocean	Marøya	2 h 11 min
10 Jun 2026	Ronja Ocean	Marøya	3 h 56 min
09 Jun 2026	Ronja Ocean	Marøya	1 h 32 min
08 Jun 2026	Ronja Ocean	Marøya	1 h 29 min
07 Jun 2026	Ronja Ocean	Marøya	3 h 20 min
05 Jun 2026	Ronja Ocean	Marøya	1 h 35 min
04 Jun 2026	Ronja Ocean	Marøya	3 h 25 min
03 Jun 2026	Ronja Ocean	Marøya	1 h 24 min
02 Jun 2026	Ronja Ocean	Marøya	3 h 13 min
01 Jun 2026	Ronja Ocean	Marøya	2 h 4 min
30 May 2026	Ronja Ocean	Marøya	4 h 4 min

Show 30 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
29 May 2026	Ronja Ocean	Djuptaren	1 h 33 min
28 May 2026	Ronja Ocean	Djuptaren	2 h 39 min
15 May 2026	Ronja Ocean	Marøya	52 min
13 May 2026	Ronja Ocean	Ternskjæret II	2 h 11 min
05 May 2026	Ronja Naeroeysund	Bondøya	1 h 44 min
03 May 2026	Ronja Naeroeysund	Bondøya	2 h 27 min
19 Apr 2026	Ronja Ocean	Stasøya	18 h 16 min
18 Apr 2026	Ronja Ocean	Stasøya	17 h 15 min
17 Apr 2026	Ronja Ocean	Stasøya	14 h 19 min
16 Apr 2026	Ronja Ocean	Stasøya	16 h 48 min
15 Apr 2026	Ronja Ocean	Stasøya	7 h 27 min
13 Apr 2026	Ronja Explorer	Varholmen	1 h 27 min
09 Apr 2026	Ronja Explorer	Kyrøyene	3 h 7 min
07 Apr 2026	Ronja Naeroeysund	Kipholmen	15 h 24 min
03 Apr 2026	Ronja Naeroeysund	Kipholmen	10 h 19 min
01 Mar 2026	Ro Vision	Årnes	5 h 53 min
24 Feb 2026	Ro Vision	no other farm	7 h 25 min
23 Feb 2026	Ro Vision	no other farm	16 h 17 min
19 Jan 2026	Ronja Naeroeysund	Marøya	31 h 54 min
18 Jan 2026	Ronja Naeroeysund	Marøya	12 h 18 min
09 Dec 2025	Aasvaerfjord	Årnes	12 h 16 min
25 Nov 2025	Ronja Naeroeysund	Marøya	7 h 53 min
23 Nov 2025	Ronja Naeroeysund	Marøya	30 h 49 min
22 Oct 2025	Ronja Ocean	Helligholmen	39 h 42 min
21 Oct 2025	Ronja Ocean	Helligholmen	13 h 7 min
29 Aug 2025	Ronja Naeroeysund	Kvingra	9 h 36 min
28 Aug 2025	Ronja Naeroeysund	Kvingra	17 h 4 min
23 May 2025	Ronja Vita	Danielsvika	4 h 42 min
10 May 2025	Viknatrans	Brennholmen	5 h 34 min
04 May 2025	Viknatrans	Skrubbholmen	2 h 53 min

Source: Norwegian Coastal Administration (AIS) · calculated by the Salmon Ledger · updated 01 Oct 2026

Licences

Site MAB: 6,240 tonnes

Licence	Type	Capacity	Holder
NT F 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT F 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT F 0016	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT F 0021	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT FA 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT N 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,974 t	Salmar Oppdrett AS
NT N 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT N 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	863 t	Salmar Oppdrett AS

Source: Directorate of Fisheries, aquaculture register · updated 01 Oct 2026