Trollvika

Site 11351 · Tjeldsund municipality · Production area 10, Andøya til Senja

Below the lice limit, week 39Operated by Northern Lights Salmon AS · group unknown

0.01Adult 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 29 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

4Lice treatments in 2026Latest: Medicinal feed, week 33, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

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

10Wellboat visits in 2026by 2 different vessels · latest 26 Aug 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported0 salmon, October 2023Since 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	0.11	0.5	Below the limit
2	0.07	0.5	Below the limit
3	0.08	0.5	Below the limit
4	0.08	0.5	Below the limit
5	0.04	0.5	Below the limit
6	0.08	0.5	Below the limit
7	0.17	0.5	Below the limit
8	0.07	0.5	Below the limit
9	0.08	0.5	Below the limit
10	unknown	0.5	Reported without a count
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	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	0.01	0.5	Below the limit
31	0.03	0.5	Below the limit
32	0.01	0.5	Below the limit
33	0.02	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.01	0.5	Below the limit
37	0.01	0.5	Below the limit
38	0.01	0.5	Below the limit
39	0.01	0.5	Below the limit

Earlier years

20250 of 50 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	0.02	0.5	Below the limit
2	0.06	0.5	Below the limit
3	0.05	0.5	Below the limit
4	0.05	0.5	Below the limit
5	0.09	0.5	Below the limit
6	0.03	0.5	Below the limit
7	0.04	0.5	Below the limit
8	0.01	0.5	Below the limit
9	0.02	0.5	Below the limit
10	0.03	0.5	Below the limit
11	0.03	0.5	Below the limit
12	0.03	0.5	Below the limit
13	0.02	0.5	Below the limit
14	0.01	0.5	Below the limit
15	0.03	0.5	Below the limit
16	0.02	0.5	Below the limit
17	0.01	0.5	Below the limit
18	0.02	0.5	Below the limit
19	0.06	0.5	Below the limit
20	0.01	0.5	Below the limit
21	unknown	0.2	Reported without a count
22	unknown	0.2	Reported without a count
23	0.02	0.2	Below the limit
24	0.03	0.2	Below the limit
25	0.02	0.2	Below the limit
26	0.02	0.2	Below the limit
27	0.03	0.5	Below the limit
28	0.03	0.5	Below the limit
29	0.08	0.5	Below the limit
30	0.07	0.5	Below the limit
31	0.11	0.5	Below the limit
32	0.10	0.5	Below the limit
33	0.15	0.5	Below the limit
34	0.21	0.5	Below the limit
35	0.22	0.5	Below the limit
36	0.12	0.5	Below the limit
37	0.28	0.5	Below the limit
38	0.46	0.5	Near the limit
39	0.27	0.5	Below the limit
40	0.17	0.5	Below the limit
41	0.08	0.5	Below the limit
42	0.09	0.5	Below the limit
43	0.14	0.5	Below the limit
44	0.18	0.5	Below the limit
45	0.37	0.5	Below the limit
46	0.26	0.5	Below the limit
47	0.36	0.5	Below the limit
48	0.29	0.5	Below the limit
49	0.23	0.5	Below the limit
50	0.18	0.5	Below the limit
51	0.16	0.5	Below the limit
52	0.11	0.5	Below the limit

20240 of 38 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	0.13	0.5	Below the limit
2	0.20	0.5	Below the limit
3	0.15	0.5	Below the limit
4	0.00	0.5	Below the limit
5	unknown	0.5	Reported without a count
6	unknown	0.5	Reported without a count
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	0.04	0.5	Below the limit
32	0.03	0.5	Below the limit
33	0.02	0.5	Below the limit
34	0.01	0.5	Below the limit
35	0.02	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.03	0.5	Below the limit
39	0.01	0.5	Below the limit
40	0.02	0.5	Below the limit
41	0.03	0.5	Below the limit
42	0.04	0.5	Below the limit
43	0.05	0.5	Below the limit
44	0.08	0.5	Below the limit
45	0.05	0.5	Below the limit
46	0.12	0.5	Below the limit
47	0.11	0.5	Below the limit
48	0.06	0.5	Below the limit
49	0.05	0.5	Below the limit
50	0.06	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.05	0.5	Below the limit

20230 of 16 weeks with a count above the limit (data from week 40)

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, 2023
Week	Adult female lice per fish	Lice limit	Status
37	0.16	0.5	Below the limit
38	0.22	0.5	Below the limit
39	0.21	0.5	Below the limit
40	0.19	0.5	Below the limit
41	0.11	0.5	Below the limit
42	0.16	0.5	Below the limit
43	0.08	0.5	Below the limit
44	0.21	0.5	Below the limit
45	0.23	0.5	Below the limit
46	0.32	0.5	Below the limit
47	0.26	0.5	Below the limit
48	0.18	0.5	Below the limit
49	0.27	0.5	Below the limit
50	0.24	0.5	Below the limit
51	0.20	0.5	Below the limit
52	0.18	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 33, 2026
Medicinal feed5 pens · Emamectin benzoat
Week 32, 2026
Medicinal feed5 pens · Emamectin benzoat
Week 40, 2025
Thermal delousing, Freshwater treatment5 pens
Week 51, 2024
Medicinal feed2 pens · Emamectin benzoat

Show all 9

Week 50, 2024
Medicinal feed2 pens · Emamectin benzoat
Week 44, 2024
Medicinal feed1 pen · Emamectin benzoat
Week 43, 2024
Medicinal feed1 pen · Emamectin benzoat
Week 32, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 31, 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

03 Oct 2023
0 salmon escapedCause: Ved rutinekontroll på lokalitet Trollvika, bur 2, merd 202 ble det oppdaget et vertikalt hull på 14 meters dybde. Maskebrudd 20x6 masker. Merd inneholder stor fisk med en størrelse på 6.3 kg. Beredskapsplan iverksatt, dykkere er på lokalitet og bøter hull halvtime etter at det er oppdaget. Hullet er lokalisert på motsatt side av utstyr i merd - og vi har ingen mistanke om at vi selv eller innleide selskaper har påført hull i not. Det er heller ingen håndtering av merd/utstyr i merd på denne siden hvor hullet ble oppdaget. Per nå ingen mistanke om rømming -ingen observasjoner som tyder på dette. Gjenfangstgarn satt ut. Sist kontroll med ROV på aktuell merd var 4. september. · Directorate of Fisheries

Wellboat visits

10 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
26 Aug 2026	Caspian	Ystevika	1 h 54 min
25 Aug 2026	Caspian	Ystevika	1 h 4 min
14 May 2026	Caspian	Hellfjorden	6 h 42 min
12 May 2026	Caspian	Hellfjorden	4 h 42 min
06 Mar 2026	Caspian	Brattberg	3 h 4 min
28 Feb 2026	Caspian	Alsvåg	4 h 30 min
24 Feb 2026	Caspian	Ånderkleiva	3 h 27 min
11 Jan 2026	Grotanger	Brattberg	3 h 29 min
07 Jan 2026	Grotanger	Brattberg	3 h 58 min
03 Jan 2026	Grotanger	Alsvåg	3 h 16 min
30 Nov 2025	Caspian	Brattberg	4 h 42 min
23 Nov 2025	Caspian	Skjærvika	4 h 15 min

Show 24 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
03 Oct 2025	Grotanger	Gjervika	17 h 7 min
02 Oct 2025	Grotanger	Gjervika	14 h 7 min
29 Sep 2025	Caspian	Skjellesvika	3 h 40 min
24 Sep 2025	Grotanger	Holmen	3 h 52 min
21 Sep 2025	Grotanger	Brattberg	4 h 2 min
13 Sep 2025	Skrova	Breivoll	1 h 15 min
13 Sep 2025	Grotanger	Brattberg	5 h 24 min
13 Sep 2025	Skrova	Frovågneset	1 h 51 min
08 Sep 2025	Grotanger	Rotvika	3 h 37 min
30 Aug 2025	Grotanger	Brattberg	3 h 56 min
25 Aug 2025	Caspian	Rotvika	4 h 14 min
19 Aug 2025	Caspian	Alsvåg	3 h 41 min
12 Aug 2025	Grotanger	Kasteberget	3 h 48 min
16 Oct 2024	Viknatrans	Ystevika	9 h 58 min
16 Oct 2024	Viknatrans	Ystevika	5 h 42 min
10 May 2024	Grotanger	Ystevika	5 h 40 min
07 May 2024	Grotanger	Jekteberget	3 h 42 min
06 May 2024	Grotanger	Jekteberget	5 h 29 min
07 Feb 2024	Grotanger	Brattberg	3 h 32 min
31 Jan 2024	Grotanger	Bjørnstein	2 h 55 min
23 Jan 2024	Grotanger	Brattberg	4 h 29 min
15 Jan 2024	Grotanger	Rotvika	2 h 44 min
07 Jan 2024	Grotanger	Rotvika	3 h 29 min
01 Jan 2024	Grotanger	no other farm	5 h 22 min

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

Licences

Site MAB: 5,900 tonnes

Licence	Type	Capacity	Holder
T I 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Sørrollnesfisk AS
T I 0016	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Sørrollnesfisk AS
T I 0017	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Sørrollnesfisk AS
T KN 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS
T KN 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS
T SK 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS
T SK 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS

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