Buholmen

Site 11543 · Austevoll municipality · Production area 3, Karmøy til Sotra

Below the lice limit, week 39Operated by Sjøtroll Havbruk Sjø AS · group Lerøy Seafood Group

0.11Adult 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 22 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

6Lice treatments in 2026Latest: Thermal delousing, week 16, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone active · 1 earlierRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

9Wellboat visits in 2026by 3 different vessels · latest 11 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 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	0.09	0.5	Below the limit
2	0.13	0.5	Below the limit
3	0.19	0.5	Below the limit
4	0.19	0.5	Below the limit
5	0.22	0.5	Below the limit
6	0.30	0.5	Below the limit
7	0.38	0.5	Below the limit
8	0.27	0.5	Below the limit
9	0.22	0.5	Below the limit
10	0.11	0.5	Below the limit
11	0.12	0.5	Below the limit
12	0.14	0.5	Below the limit
13	0.19	0.5	Below the limit
14	0.22	0.5	Below the limit
15	0.29	0.5	Below the limit
16	0.16	0.2	Below the limit
17	unknown	0.2	Reported without a count
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	Reported without a count
34	0.00	0.5	Below the limit
35	0.05	0.5	Below the limit
36	0.05	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.13	0.5	Below the limit
39	0.11	0.5	Below the limit

Earlier years

20258 of 52 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	0.12	0.5	Below the limit
2	0.18	0.5	Below the limit
3	0.23	0.5	Below the limit
4	0.21	0.5	Below the limit
5	0.21	0.5	Below the limit
6	0.14	0.5	Below the limit
7	0.10	0.5	Below the limit
8	0.10	0.5	Below the limit
9	0.13	0.5	Below the limit
10	0.15	0.5	Below the limit
11	0.19	0.5	Below the limit
12	0.06	0.5	Below the limit
13	0.03	0.5	Below the limit
14	0.05	0.5	Below the limit
15	0.05	0.5	Below the limit
16	0.07	0.2	Below the limit
17	0.11	0.2	Below the limit
18	0.15	0.2	Below the limit
19	0.24	0.2	Above the limit
20	0.33	0.2	Above the limit
21	0.16	0.2	Below the limit
22	0.18	0.5	Below the limit
23	0.14	0.5	Below the limit
24	0.16	0.5	Below the limit
25	0.26	0.5	Below the limit
26	0.26	0.5	Below the limit
27	0.19	0.5	Below the limit
28	0.22	0.5	Below the limit
29	0.21	0.5	Below the limit
30	0.21	0.5	Below the limit
31	0.24	0.5	Below the limit
32	0.46	0.5	Near the limit
33	0.18	0.5	Below the limit
34	0.21	0.5	Below the limit
35	0.48	0.5	Near the limit
36	0.35	0.5	Below the limit
37	0.25	0.5	Below the limit
38	0.37	0.5	Below the limit
39	0.71	0.5	Above the limit
40	0.33	0.5	Below the limit
41	0.33	0.5	Below the limit
42	0.32	0.5	Below the limit
43	0.45	0.5	Near the limit
44	0.45	0.5	Near the limit
45	0.20	0.5	Below the limit
46	0.24	0.5	Below the limit
47	0.36	0.5	Below the limit
48	0.58	0.5	Above the limit
49	0.85	0.5	Above the limit
50	1.03	0.5	Above the limit
51	0.70	0.5	Above the limit
52	0.64	0.5	Above the limit

20240 of 14 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	0.2	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
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	0.03	0.5	Below the limit
44	0.29	0.5	Below the limit
45	0.15	0.5	Below the limit
46	0.02	0.5	Below the limit
47	0.01	0.5	Below the limit
48	0.03	0.5	Below the limit
49	0.09	0.5	Below the limit
50	0.17	0.5	Below the limit
51	0.23	0.5	Below the limit
52	0.22	0.5	Below the limit

20232 of 9 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	0.15	0.5	Below the limit
41	0.49	0.5	Near the limit
42	3.29	0.5	Above the limit
43	0.41	0.5	Near the limit
44	0.24	0.5	Below the limit
45	0.18	0.5	Below the limit
46	0.25	0.5	Below the limit
47	0.47	0.5	Near the limit
48	0.57	0.5	Above the limit
49	unknown	0.5	Not reported
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

Treatments

Norwegian Food Safety Authority

Week 16, 2026
Thermal delousing2 pens
Week 8, 2026
Thermal delousing3 pens
Week 7, 2026
Thermal delousing1 pen
Week 1, 2026
Thermal delousing3 pens

Show all 29

Week 52, 2025
Thermal delousing2 pens
Week 50, 2025
Thermal delousing5 pens
Week 49, 2025
Thermal delousing2 pens
Week 45, 2025
Thermal delousing4 pens
Week 44, 2025
Thermal delousing3 pens
Week 41, 2025
Thermal delousing1 pen
Week 40, 2025
Thermal delousing5 pens
Week 36, 2025
Thermal delousing7 pens
Week 33, 2025
Thermal delousing4 pens
Week 32, 2025
Thermal delousing3 pens
Week 27, 2025
Thermal delousing, Freshwater treatment8 pens
Week 26, 2025
Freshwater treatment, Thermal delousing4 pens
Week 22, 2025
Thermal delousing3 pens
Week 21, 2025
Thermal delousing3 pens
Week 19, 2025
Thermal delousing1 pen
Week 12, 2025
Thermal delousing7 pens
Week 6, 2025
Thermal delousing4 pens
Week 4, 2025
Thermal delousing3 pens
Week 52, 2024
Medicinal bath, Thermal delousing5 pens · Azamethiphos
Week 46, 2024
Medicinal bath3 pens · Azamethiphos
Week 45, 2024
Medicinal bath1 pen · Azamethiphos
Week 45, 2023
Other treatment1 pen · Optilicer
Week 44, 2023
Other treatment6 pens · Optilicer
Week 43, 2023
Other treatment3 pens · Skamik
Week 42, 2023
Other treatment4 pens · Skamik

Disease

Norwegian Food Safety Authority

23 Aug 2026
Pancreas disease (PD): closedSubtype SAV3 · started 22 Jan 2025 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

9 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 Sep 2026	Mowi Star	Naveide	3 h 12 min
03 Sep 2026	Mowi Star	Otterholmen	5 h 12 min
11 Aug 2026	Mowi Star	Naveide	5 h 43 min
16 Apr 2026	Seihav	Hestabyneset	28 h 11 min
16 Feb 2026	Seigrunn	Haugsnesvåg	39 h 49 min
15 Feb 2026	Seigrunn	Haugsnesvåg	6 h 34 min
14 Feb 2026	Seigrunn	Haugsnesvåg	21 h 55 min
13 Feb 2026	Seigrunn	Haugsnesvåg	2 h 17 min
18 Jan 2026	Seigrunn	Sauøy	14 h 56 min
26 Dec 2025	Seigrunn	Storoksen	20 h 11 min
25 Dec 2025	Seigrunn	Storoksen	8 h 2 min
03 Jul 2025	Seihav	Trælsøyosen disease or zone there	26 h 44 min

Show 22 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
02 Jul 2025	Seihav	Trælsøyosen disease or zone there	1 h 43 min
01 Jul 2025	Seihav	Trælsøyosen disease or zone there	21 h 7 min
23 Jun 2025	Seigrunn	Sagen 2	32 h 29 min
11 May 2025	Seihav	Buarøy	1 h 46 min
10 May 2025	Seihav	Buarøy	9 h 6 min
23 Mar 2025	Seihav	Naveide	18 h 8 min
22 Mar 2025	Seihav	Naveide	17 h 8 min
21 Mar 2025	Seihav	Naveide	10 h 57 min
07 Feb 2025	Seihav	Skorpo	12 h 2 min
07 Feb 2025	Seihav	Skorpo	10 h 59 min
06 Feb 2025	Seihav	Skorpo	17 h 34 min
24 Jan 2025	Horda Pioneer	Blom	14 h 28 min
27 Dec 2024	Seihav	Flatøyflu	1 h 18 min
27 Dec 2024	Seihav	Flatøyflu	14 h 45 min
26 Dec 2024	Seihav	Flatøyflu	20 h 30 min
15 Nov 2024	Mowi Star	Storskrebukti	1 h 6 min
11 Nov 2024	Ronja Azul	Skaganeset	5 h 11 min
11 Nov 2024	Ronja Azul	Skaganeset	4 h 46 min
10 Nov 2024	Ronja Azul	Skaganeset	1 h 16 min
10 Nov 2024	Ronja Azul	Skaganeset	3 h 54 min
05 Nov 2024	Mowi Star	Otterholmen	1 h 1 min
04 Nov 2024	Mowi Star	Otterholmen	2 h 9 min

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

Licences

Site MAB: 5,460 tonnes

Licence	Type	Capacity	Holder
H AV 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,378 t	Sjøtroll Havbruk Sjø AS
H AV 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H AV 0021	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H AV 0040	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H FJ 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS
H FJ 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Sjøtroll Havbruk Sjø AS

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