Grimsholmen

Site 11559 · Sveio municipality · Production area 3, Karmøy til Sotra

Below the lice limit, week 39Operated by Sjøtroll Havbruk Sjø AS

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

10Lice treatments in 2026Latest: Thermal delousing, 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

13Wellboat visits in 2026by 3 different vessels · latest 10 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 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

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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	0.00	0.5	Below the limit
9	0.00	0.5	Below the limit
10	0.00	0.5	Below the limit
11	0.00	0.5	Below the limit
12	unknown	0.5	Reported without a count
13	0.00	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.03	0.2	Below the limit
20	0.08	0.2	Below the limit
21	0.01	0.2	Below the limit
22	0.00	0.5	Below the limit
23	0.01	0.5	Below the limit
24	0.01	0.5	Below the limit
25	0.11	0.5	Below the limit
26	0.36	0.5	Below the limit
27	0.08	0.5	Below the limit
28	0.04	0.5	Below the limit
29	0.05	0.5	Below the limit
30	0.00	0.5	Below the limit
31	0.13	0.5	Below the limit
32	0.49	0.5	Near the limit
33	0.05	0.5	Below the limit
34	0.04	0.5	Below the limit
35	0.05	0.5	Below the limit
36	0.09	0.5	Below the limit
37	0.43	0.5	Near the limit
38	0.04	0.5	Below the limit
39	0.01	0.5	Below the limit

Earlier years

20258 of 35 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	Reported without a count
11	0.00	0.5	Below the limit
12	0.00	0.5	Below the limit
13	0.00	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	unknown	0.2	Reported without a count
18	0.09	0.2	Below the limit
19	0.13	0.2	Below the limit
20	0.02	0.2	Below the limit
21	0.03	0.2	Below the limit
22	0.10	0.5	Below the limit
23	0.15	0.5	Below the limit
24	0.19	0.5	Below the limit
25	0.28	0.5	Below the limit
26	0.67	0.5	Above the limit
27	0.11	0.5	Below the limit
28	0.12	0.5	Below the limit
29	0.13	0.5	Below the limit
30	0.22	0.5	Below the limit
31	0.50	0.5	Above the limit
32	0.48	0.5	Near the limit
33	0.02	0.5	Below the limit
34	0.04	0.5	Below the limit
35	0.12	0.5	Below the limit
36	0.42	0.5	Near the limit
37	0.47	0.5	Near the limit
38	0.13	0.5	Below the limit
39	0.20	0.5	Below the limit
40	0.30	0.5	Below the limit
41	0.59	0.5	Above the limit
42	0.87	0.5	Above the limit
43	0.68	0.5	Above the limit
44	0.55	0.5	Above the limit
45	0.86	0.5	Above the limit
46	1.13	0.5	Above the limit
47	unknown	0.5	Not reported
48	unknown	0.5	Reported without a count
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 20 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	0.06	0.5	Below the limit
2	0.35	0.5	Below the limit
3	0.23	0.5	Below the limit
4	0.11	0.5	Below the limit
5	0.18	0.5	Below the limit
6	0.26	0.5	Below the limit
7	0.24	0.5	Below the limit
8	0.33	0.5	Below the limit
9	0.36	0.5	Below the limit
10	0.10	0.5	Below the limit
11	0.05	0.5	Below the limit
12	0.05	0.5	Below the limit
13	0.03	0.5	Below the limit
14	0.01	0.5	Below the limit
15	0.01	0.5	Below the limit
16	0.11	0.2	Below the limit
17	0.04	0.2	Below the limit
18	0.04	0.2	Below the limit
19	0.05	0.2	Below the limit
20	0.10	0.2	Below the limit
21	unknown	0.2	Not reported
22	unknown	0.5	Not reported
23	unknown	0.5	Not reported
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
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

20232 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	0.08	0.5	Below the limit
41	0.06	0.5	Below the limit
42	0.03	0.5	Below the limit
43	0.06	0.5	Below the limit
44	0.09	0.5	Below the limit
45	0.15	0.5	Below the limit
46	0.59	0.5	Above the limit
47	0.88	0.5	Above the limit
48	0.25	0.5	Below the limit
49	0.04	0.5	Below the limit
50	0.09	0.5	Below the limit
51	0.09	0.5	Below the limit
52	0.06	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 38, 2026
Freshwater treatment, Thermal delousing8 pens
Week 33, 2026
Thermal delousing, Freshwater treatment4 pens
Week 27, 2026
Freshwater treatment, Thermal delousingWhole site
Week 20, 2026
Freshwater treatment, Thermal delousingWhole site

Show all 17

Week 45, 2025
Thermal delousing1 pen
Week 43, 2025
Freshwater treatment, Thermal delousing2 pens
Week 38, 2025
Freshwater treatment, Thermal delousing4 pens
Week 37, 2025
Freshwater treatment, Thermal delousing4 pens
Week 33, 2025
Thermal delousing, Freshwater treatment4 pens
Week 32, 2025
Other treatment2 pens · Kombi - Ferskvann og Termisk
Week 27, 2025
Freshwater treatment, Thermal delousing6 pens
Week 26, 2025
Freshwater treatment, Thermal delousing2 pens
Week 20, 2025
Thermal delousing, Freshwater treatment4 pens
Week 19, 2025
Freshwater treatment, Thermal delousing4 pens
Week 9, 2024
Thermal delousing, Freshwater treatmentWhole site
Week 48, 2023
Other treatmentWhole site · Kombi - FV og Thermisk
Week 40, 2023
Other treatment3 pens · Kombi - FV og Thermisk

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

13 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 Aug 2026	Seigrunn	Storevikholmen	20 h 31 min
09 Aug 2026	Seigrunn	Storevikholmen	14 h 57 min
01 Jul 2026	Seigrunn	Sagen 2	33 h 28 min
15 May 2026	Seihav	Sagen 2	21 h 24 min
14 May 2026	Seihav	Stualand	1 h 0 min
03 Mar 2026	Seifjell	Haugsnesvåg	3 h 41 min
02 Mar 2026	Seifjell	Haugsnesvåg	7 h 6 min
01 Mar 2026	Seifjell	Haugsnesvåg	34 min
01 Mar 2026	Seifjell	Haugsnesvåg	1 h 23 min
28 Feb 2026	Seifjell	Haugsnesvåg	3 h 44 min
18 Feb 2026	Seifjell	Storebø	1 h 53 min
17 Feb 2026	Seifjell	Storebø	1 h 49 min

Show 40 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
16 Feb 2026	Seifjell	Storebø	1 h 25 min
22 Oct 2025	Seigrunn	Sagen 2	7 h 36 min
21 Oct 2025	Seigrunn	Sagen 2	13 h 12 min
20 Oct 2025	Seigrunn	Sagen 2	3 h 12 min
17 Sep 2025	Seigrunn	Sagen 2	1 h 41 min
16 Sep 2025	Seigrunn	Sagen 2	6 h 0 min
14 Sep 2025	Seigrunn	Sagen 2	7 h 19 min
11 Aug 2025	Seigrunn	Sagen 2	14 h 19 min
10 Aug 2025	Seigrunn	Sagen 2	10 h 24 min
06 Jul 2025	Seigrunn	Sagen 2	16 h 1 min
05 Jul 2025	Navoey	Haugsnesvåg	9 h 6 min
04 Jul 2025	Navoey	Haugsnesvåg	16 h 4 min
03 Jul 2025	Navoey	Haugsnesvåg	15 h 53 min
02 Jul 2025	Navoey	Haugsnesvåg	16 h 42 min
01 Jul 2025	Navoey	Haugsnesvåg	15 h 16 min
29 Jun 2025	Navoey	Haugsnesvåg	3 h 34 min
29 Jun 2025	Navoey	Haugsnesvåg	45 min
28 Jun 2025	Navoey	Haugsnesvåg	20 h 38 min
27 Jun 2025	Navoey	Haugsnesvåg	11 h 17 min
26 Jun 2025	Navoey	Haugsnesvåg	13 h 34 min
25 Jun 2025	Navoey	Haugsnesvåg	1 h 2 min
11 May 2025	Seigrunn	Buarøy	17 h 47 min
08 Mar 2025	Seifjell	Kelvesteinen	2 h 29 min
07 Mar 2025	Seifjell	Kelvesteinen	1 h 13 min
06 Mar 2025	Seifjell	Kelvesteinen	1 h 22 min
06 Mar 2025	Seifjell	Kelvesteinen	6 h 24 min
05 Mar 2025	Seifjell	Kelvesteinen	2 h 1 min
04 Mar 2025	Seifjell	Kelvesteinen	8 h 39 min
04 Mar 2025	Seifjell	Kelvesteinen	1 h 14 min
03 Mar 2025	Seifjell	Kelvesteinen	1 h 24 min
03 Mar 2025	Seifjell	Kelvesteinen	2 h 56 min
08 Mar 2024	Navoey	Håøya Nø	2 h 30 min
04 Mar 2024	Seihav	Mjåneset	1 h 4 min
04 Mar 2024	Horda Pioneer	Angelskår	2 h 30 min
03 Mar 2024	Horda Pioneer	Angelskår	12 h 57 min
03 Mar 2024	Seihav	Mjåneset	13 h 10 min
02 Mar 2024	Seihav	Mjåneset	18 h 14 min
02 Mar 2024	Horda Pioneer	Angelskår	18 h 20 min
01 Mar 2024	Horda Pioneer	Angelskår	2 h 24 min
01 Mar 2024	Seihav	Mjåneset	5 h 11 min

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

Licences

Site MAB: 3,120 tonnes

Licence	Type	Capacity	Holder
H K 0036	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H L 0016	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H T 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H T 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS

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