Grisholmsundet

Site 11771 · Fedje municipality · Production area 4, Nordhordland til Stadt

Below the lice limit, week 39Operated by Tombre Fiskeanlegg AS · group unknown

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 1 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

0Wellboat visits in 2026Latest visit 06 Oct 2025Derived 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	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	unknown	0.2	Not reported
20	unknown	0.2	Not reported
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	0.00	0.5	Below the limit

Earlier years

20250 of 40 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	0.01	0.5	Below the limit
2	0.00	0.5	Below the limit
3	0.00	0.5	Below the limit
4	0.00	0.5	Below the limit
5	0.00	0.5	Below the limit
6	0.00	0.5	Below the limit
7	0.00	0.5	Below the limit
8	0.00	0.5	Below the limit
9	0.00	0.5	Below the limit
10	0.03	0.5	Below the limit
11	0.08	0.5	Below the limit
12	0.06	0.5	Below the limit
13	0.13	0.5	Below the limit
14	0.11	0.5	Below the limit
15	0.07	0.5	Below the limit
16	0.04	0.2	Below the limit
17	0.06	0.2	Below the limit
18	0.10	0.2	Below the limit
19	0.06	0.2	Below the limit
20	0.03	0.2	Below the limit
21	0.03	0.2	Below the limit
22	0.05	0.5	Below the limit
23	0.01	0.5	Below the limit
24	0.01	0.5	Below the limit
25	0.01	0.5	Below the limit
26	0.01	0.5	Below the limit
27	0.02	0.5	Below the limit
28	0.01	0.5	Below the limit
29	0.14	0.5	Below the limit
30	0.00	0.5	Below the limit
31	0.12	0.5	Below the limit
32	0.14	0.5	Below the limit
33	0.00	0.5	Below the limit
34	0.05	0.5	Below the limit
35	0.10	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.10	0.5	Below the limit
39	0.00	0.5	Below the limit
40	0.00	0.5	Below the limit
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 39 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	0.11	0.5	Below the limit
2	0.08	0.5	Below the limit
3	0.10	0.5	Below the limit
4	0.11	0.5	Below the limit
5	0.11	0.5	Below the limit
6	0.19	0.5	Below the limit
7	0.17	0.5	Below the limit
8	0.19	0.5	Below the limit
9	0.31	0.5	Below the limit
10	0.26	0.5	Below the limit
11	0.26	0.5	Below the limit
12	0.33	0.5	Below the limit
13	0.31	0.5	Below the limit
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	unknown	0.2	Not reported
20	unknown	0.2	Not reported
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	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	0.00	0.5	Below the limit
34	0.00	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.01	0.5	Below the limit
39	0.00	0.5	Below the limit
40	0.00	0.5	Below the limit
41	0.00	0.5	Below the limit
42	0.00	0.5	Below the limit
43	0.00	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.01	0.5	Below the limit
46	0.01	0.5	Below the limit
47	0.00	0.5	Below the limit
48	0.01	0.5	Below the limit
49	0.00	0.5	Below the limit
50	0.00	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.01	0.5	Below the limit

20230 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	0.00	0.5	Below the limit
41	0.00	0.5	Below the limit
42	0.00	0.5	Below the limit
43	0.00	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.00	0.5	Below the limit
47	0.01	0.5	Below the limit
48	0.02	0.5	Below the limit
49	0.02	0.5	Below the limit
50	0.08	0.5	Below the limit
51	0.08	0.5	Below the limit
52	0.12	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

No treatments recorded since week 40, 2023.

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

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
06 Oct 2025	Rohav	Langøy	1 h 43 min
14 Aug 2025	Rostein	Mjølsvik	2 h 2 min
21 Jul 2025	Namsos	Moldøyosen	9 h 48 min
19 Jul 2025	Horda Pioneer	Moldøyosen	8 h 25 min
22 Apr 2025	Navoey	Haugsnesvåg	8 h 13 min
20 Apr 2025	Navoey	Haugsnesvåg	10 h 19 min
19 Apr 2025	Navoey	Haugsnesvåg	4 h 46 min
20 Oct 2024	Seifjell	Moldøyosen	6 h 4 min
07 Jul 2024	Seifjell	Moldøyosen	4 h 33 min
05 Jul 2024	Seifjell	Moldøyosen	4 h 15 min
02 Jul 2024	Seifjell	Tuholmane Ø	8 h 9 min
12 Apr 2024	Namsos	Langevågen	1 h 58 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
Fjord Drift AS	Week 40, 2023	Week 49, 2023
Tombre Fiskeanlegg AS	Week 50, 2023	Week 39, 2026

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

Licences

Site MAB: 1,560 tonnes

Licence	Type	Capacity	Holder
H FE 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	922 t	Tombre Fiskeanlegg AS
H FS 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	823 t	Tombre Fiskeanlegg AS
H KM 0017	Kommersiell / matfiskSalmon, Rainbow trout, Trout	876 t	Tombre Fiskeanlegg AS
H OR 0025	Kommersiell / matfiskSalmon, Rainbow trout, Trout	928 t	Tombre Fiskeanlegg AS

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