Grøtnes N

Site 45005 · Hammerfest municipality · Production area 12, Vest-Finnmark

Below the lice limit, week 39Operated by Cermaq Norway Salmon AS · group Cermaq

0.10Adult 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 26 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

2Lice treatments in 2026Latest: Medicinal feed, week 38, 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

17Wellboat visits in 2026by 7 different vessels · latest 11 Aug 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	0.03	0.5	Below the limit
2	0.03	0.5	Below the limit
3	0.04	0.5	Below the limit
4	0.03	0.5	Below the limit
5	0.03	0.5	Below the limit
6	0.05	0.5	Below the limit
7	0.11	0.5	Below the limit
8	0.02	0.5	Below the limit
9	0.15	0.5	Below the limit
10	0.09	0.5	Below the limit
11	0.08	0.5	Below the limit
12	0.08	0.5	Below the limit
13	0.04	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.13	0.5	Below the limit
16	0.05	0.5	Below the limit
17	0.08	0.5	Below the limit
18	unknown	0.5	Reported without a count
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	0.00	0.5	Below the limit
31	unknown	0.5	Reported without a count
32	0.00	0.5	Below the limit
33	0.00	0.5	Below the limit
34	0.00	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	0.10	0.5	Below the limit

Earlier years

20250 of 27 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	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	Reported without a count
26	0.01	0.2	Below the limit
27	0.02	0.5	Below the limit
28	0.02	0.5	Below the limit
29	0.02	0.5	Below the limit
30	0.03	0.5	Below the limit
31	0.03	0.5	Below the limit
32	0.03	0.5	Below the limit
33	0.14	0.5	Below the limit
34	0.21	0.5	Below the limit
35	0.41	0.5	Near the limit
36	0.27	0.5	Below the limit
37	0.03	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.03	0.5	Below the limit
40	0.01	0.5	Below the limit
41	0.12	0.5	Below the limit
42	0.24	0.5	Below the limit
43	0.13	0.5	Below the limit
44	0.21	0.5	Below the limit
45	0.22	0.5	Below the limit
46	0.25	0.5	Below the limit
47	0.35	0.5	Below the limit
48	0.31	0.5	Below the limit
49	0.18	0.5	Below the limit
50	0.02	0.5	Below the limit
51	0.06	0.5	Below the limit
52	0.00	0.5	Below the limit

20240 of 2 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	0.43	0.5	Near the limit
2	0.48	0.5	Near the limit
3	unknown	0.5	Reported without a count
4	unknown	0.5	Reported without a count
5	unknown	0.5	Reported without a count
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	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

20231 of 13 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
40	0.23	0.5	Below the limit
41	0.56	0.5	Above the limit
42	0.26	0.5	Below the limit
43	0.05	0.5	Below the limit
44	0.09	0.5	Below the limit
45	0.20	0.5	Below the limit
46	0.17	0.5	Below the limit
47	0.21	0.5	Below the limit
48	0.13	0.5	Below the limit
49	0.47	0.5	Near the limit
50	0.47	0.5	Near the limit
51	0.48	0.5	Near the limit
52	0.42	0.5	Near the limit

Treatments

Norwegian Food Safety Authority

Week 38, 2026
Medicinal feedWhole site · Emamectin benzoat
Week 37, 2026
Medicinal feedWhole site · Emamectin benzoat
Week 50, 2025
Freshwater treatment, Mechanical delousing2 pens
Week 49, 2025
Mechanical delousing, Freshwater treatment9 pens

Show all 8

Week 43, 2025
Medicinal bath3 pens · Deltamethrin
Week 37, 2025
Mechanical delousing1 pen
Week 36, 2025
Mechanical delousing4 pens
Week 41, 2023
Medicinal bath3 pens · Azamethiphos

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

17 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
11 Aug 2026	Ro Chief	Bergsnes V	1 h 23 min
08 Aug 2026	Froey Viking	Sandholmane	4 h 27 min
04 Aug 2026	Doennland	Rypefjord	1 h 42 min
26 Jul 2026	Steigen	Storholmen	5 h 2 min
05 May 2026	Veidnes	Skjervøy	2 h 35 min
04 May 2026	Veidnes	Storskjæret	4 h 35 min
28 Apr 2026	Ronja Silver	Rypefjord	2 h 25 min
25 Apr 2026	Ronja Silver	Rypefjord	5 h 23 min
14 Apr 2026	Ronja Silver	Rypefjord	2 h 32 min
11 Apr 2026	Ronja Silver	Jernøya	6 h 22 min
04 Mar 2026	Ro Sunrise	Ytre Simanes	1 h 42 min
02 Mar 2026	Ro Sunrise	Ytre Simanes	4 h 16 min

Show 20 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
01 Mar 2026	Ro Sunrise	Rypefjord	2 h 3 min
16 Feb 2026	Ronja Silver	Ytre Simanes	3 h 32 min
15 Feb 2026	Ro Sunrise	Kleppenes N	2 h 2 min
27 Jan 2026	Veidnes	Ytre Simanes	1 h 37 min
27 Jan 2026	Ronja Silver	Davatluft	3 h 9 min
08 Dec 2025	Ronja Silver	Vannfjorden	14 h 50 min
07 Dec 2025	Ronja Silver	Vannfjorden	14 h 34 min
04 Dec 2025	Ronja Silver	Vannfjorden	13 h 57 min
02 Dec 2025	Ronja Silver	Vannfjorden	18 h 40 min
01 Dec 2025	Ronja Silver	Vannfjorden	6 h 58 min
09 Sep 2025	Ronja Silver	Stangnes	4 h 27 min
08 Sep 2025	Ronja Silver	Solheim	11 h 5 min
07 Sep 2025	Ronja Silver	Solheim	4 h 39 min
07 Sep 2025	Ronja Silver	Solheim	7 h 28 min
06 Sep 2025	Ronja Silver	Solheim	15 h 45 min
24 Aug 2025	Ronja Skilsoy	Skjervøy	3 h 56 min
03 Jul 2025	Ronja Skilsoy	Stangnes	1 h 48 min
21 Jun 2025	Ronja Silver	Stangnes	1 h 15 min
20 Jun 2025	Ronja Silver	Stangnes	1 h 21 min
19 Jun 2025	Ronja Silver	Stangnes	1 h 7 min

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

Who has reported

The companies that have submitted lice counts for this site, with the first and last week.

Company	From	To
Cermaq Finnmark Farming AS	Week 40, 2023	Week 17, 2026
Cermaq Norway Salmon AS	Week 18, 2026	Week 39, 2026

Source: Norwegian Food Safety Authority (organisation number on each lice report)

Licences

Site MAB: 5,784 tonnes

Licence	Type	Capacity	Holder
F H 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0017	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0018	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0019	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0023	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0032	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F H 0033	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F HV 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F KD 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F L 0022	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F L 0025	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F L 0026	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F L 0033	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F NK 0019	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F NK 0020	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F NK 0022	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F NK 0023	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS
F NK 0024	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Cermaq Norway Salmon AS

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