Trælvika

Site 30517 · Senja municipality · Production area 10, Andøya til Senja

Below the lice limit, week 39Operated by Salmar Oppdrett AS · group SalMar

0.00Adult female lice per fishLimit 0.50 · below the limitWeek 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 4 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

0Lice treatments in 2026None recorded2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone recordedRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

2Wellboat visits in 2026by 2 different vessels · latest 10 Sep 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 21–26 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

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Adult female lice per fish per week, 2026
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	0.5	Not reported
17	unknown	0.5	Not reported
18	unknown	0.5	Not reported
19	unknown	0.5	Not reported
20	unknown	0.5	Not reported
21	unknown	0.2	Not reported
22	unknown	0.2	Not reported
23	unknown	0.2	Not reported
24	unknown	0.2	Not reported
25	unknown	0.2	Not reported
26	unknown	0.2	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	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.00	0.5	Below the limit

Earlier years

20250 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

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Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.08	0.5	Below the limit
2	0.15	0.5	Below the limit
3	0.10	0.5	Below the limit
4	0.09	0.5	Below the limit
5	0.10	0.5	Below the limit
6	0.11	0.5	Below the limit
7	0.20	0.5	Below the limit
8	0.09	0.5	Below the limit
9	0.14	0.5	Below the limit
10	0.11	0.5	Below the limit
11	0.08	0.5	Below the limit
12	0.04	0.5	Below the limit
13	0.11	0.5	Below the limit
14	0.10	0.5	Below the limit
15	0.09	0.5	Below the limit
16	0.06	0.5	Below the limit
17	0.06	0.5	Below the limit
18	0.08	0.5	Below the limit
19	0.06	0.5	Below the limit
20	0.03	0.5	Below the limit
21	0.06	0.2	Below the limit
22	0.04	0.2	Below the limit
23	0.07	0.2	Below the limit
24	0.08	0.2	Below the limit
25	0.11	0.2	Below the limit
26	0.11	0.2	Below the limit
27	0.08	0.5	Below the limit
28	0.27	0.5	Below the limit
29	0.23	0.5	Below the limit
30	0.26	0.5	Below the limit
31	0.28	0.5	Below the limit
32	0.38	0.5	Below the limit
33	0.25	0.5	Below the limit
34	0.41	0.5	Near the limit
35	unknown	0.5	Reported without a count
36	unknown	0.5	Not reported
37	unknown	0.5	Not reported
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported
40	unknown	0.5	Not reported
41	unknown	0.5	Not reported
42	unknown	0.5	Not reported
43	unknown	0.5	Not reported
44	unknown	0.5	Not reported
45	unknown	0.5	Not reported
46	unknown	0.5	Not reported
47	unknown	0.5	Not reported
48	unknown	0.5	Not reported
49	unknown	0.5	Not reported
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20240 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

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Adult female lice per fish per week, 2024
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	0.5	Not reported
17	unknown	0.5	Not reported
18	unknown	0.5	Not reported
19	0.00	0.5	Below the limit
20	0.00	0.5	Below the limit
21	0.00	0.2	Below the limit
22	0.00	0.2	Below the limit
23	0.00	0.2	Below the limit
24	0.00	0.2	Below the limit
25	0.00	0.2	Below the limit
26	0.00	0.2	Below the limit
27	0.00	0.5	Below the limit
28	0.00	0.5	Below the limit
29	0.00	0.5	Below the limit
30	0.00	0.5	Below the limit
31	0.00	0.5	Below the limit
32	0.00	0.5	Below the limit
33	0.01	0.5	Below the limit
34	0.01	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.03	0.5	Below the limit
37	0.06	0.5	Below the limit
38	0.11	0.5	Below the limit
39	0.07	0.5	Below the limit
40	0.08	0.5	Below the limit
41	0.04	0.5	Below the limit
42	0.28	0.5	Below the limit
43	0.21	0.5	Below the limit
44	0.30	0.5	Below the limit
45	0.38	0.5	Below the limit
46	0.40	0.5	Near the limit
47	0.03	0.5	Below the limit
48	0.04	0.5	Below the limit
49	0.05	0.5	Below the limit
50	0.05	0.5	Below the limit
51	0.02	0.5	Below the limit
52	0.03	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 32, 2025
Mechanical delousing5 pens
Week 47, 2024
Mechanical delousing5 pens
Week 30, 2024
Medicinal feedWhole site · Emamectin benzoat

Disease

Norwegian Food Safety Authority

No cases in the Food Safety Authority's register of notifiable diseases (since 26 Nov 2024).

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

2 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
10 Sep 2026	Ronja Aurora	Andholmen 1	1 h 3 min
31 Aug 2026	Ronja Viking	Hjortøya	1 h 27 min
23 Jun 2025	Ro Senja	Klubben	1 h 52 min
01 May 2024	Ronja Vita	Reiråklakken	6 h 50 min
30 Apr 2024	Ronja Vita	Reiråklakken	3 h 19 min

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

Licences

Site MAB: 3,600 tonnes

Licence	Type	Capacity	Holder
T LK 0003	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0026	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0031	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0032	Kommersiell / matfisk-grønn bSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0033	Kommersiell / matfisk-grønn aSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T T 0003	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T T 0007	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS

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