Skarvhammaren

Site 45050 · Alstahaug municipality · Production area 8, Helgeland til Bodø

Status unknown: not reported in week 39Operated by Mowi Seawater Norway AS · group Mowi

unknownAdult female lice per fishNo count in week 39. Latest: 0.00 in week 27, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 27 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

5Lice treatments in 2026Latest: Mechanical delousing, week 21, 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

23Wellboat visits in 2026by 3 different vessels · latest 16 Jun 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

Show as table

Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.27	0.5	Below the limit
2	0.09	0.5	Below the limit
3	0.12	0.5	Below the limit
4	0.23	0.5	Below the limit
5	0.25	0.5	Below the limit
6	0.30	0.5	Below the limit
7	0.17	0.5	Below the limit
8	0.17	0.5	Below the limit
9	0.21	0.5	Below the limit
10	0.20	0.5	Below the limit
11	0.23	0.5	Below the limit
12	0.26	0.5	Below the limit
13	0.23	0.5	Below the limit
14	0.25	0.5	Below the limit
15	0.24	0.5	Below the limit
16	0.27	0.5	Below the limit
17	0.33	0.5	Below the limit
18	0.35	0.5	Below the limit
19	0.37	0.5	Below the limit
20	0.41	0.5	Near the limit
21	0.09	0.2	Below the limit
22	0.13	0.2	Below the limit
23	0.09	0.2	Below the limit
24	0.17	0.2	Near 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	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

Earlier years

20250 of 36 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	0.00	0.5	Below the limit
18	0.00	0.5	Below the limit
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	0.01	0.5	Below the limit
28	0.01	0.5	Below the limit
29	0.03	0.5	Below the limit
30	0.02	0.5	Below the limit
31	0.06	0.5	Below the limit
32	0.11	0.5	Below the limit
33	0.15	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.04	0.5	Below the limit
36	0.20	0.5	Below the limit
37	0.47	0.5	Near the limit
38	0.10	0.5	Below the limit
39	0.16	0.5	Below the limit
40	0.26	0.5	Below the limit
41	0.19	0.5	Below the limit
42	0.30	0.5	Below the limit
43	0.09	0.5	Below the limit
44	0.19	0.5	Below the limit
45	0.08	0.5	Below the limit
46	0.25	0.5	Below the limit
47	0.30	0.5	Below the limit
48	0.39	0.5	Below the limit
49	0.45	0.5	Near the limit
50	0.06	0.5	Below the limit
51	0.19	0.5	Below the limit
52	0.24	0.5	Below the limit

20241 of 29 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	0.14	0.5	Below the limit
2	0.16	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	0.25	0.5	Below the limit
7	0.25	0.5	Below the limit
8	0.24	0.5	Below the limit
9	0.28	0.5	Below the limit
10	0.35	0.5	Below the limit
11	0.37	0.5	Below the limit
12	0.34	0.5	Below the limit
13	0.43	0.5	Near the limit
14	0.44	0.5	Near the limit
15	0.37	0.5	Below the limit
16	0.18	0.5	Below the limit
17	0.20	0.5	Below the limit
18	0.07	0.5	Below the limit
19	0.11	0.5	Below the limit
20	0.19	0.5	Below the limit
21	0.19	0.2	Near the limit
22	0.10	0.2	Below the limit
23	0.10	0.2	Below the limit
24	0.18	0.2	Near the limit
25	0.17	0.2	Near the limit
26	0.26	0.2	Above the limit
27	0.29	0.5	Below the limit
28	0.13	0.5	Below the limit
29	0.40	0.5	Near the limit
30	unknown	0.5	Reported without a count
31	unknown	0.5	Reported without a count
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

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	0.27	0.5	Below the limit
41	0.12	0.5	Below the limit
42	0.14	0.5	Below the limit
43	0.08	0.5	Below the limit
44	0.14	0.5	Below the limit
45	0.12	0.5	Below the limit
46	0.12	0.5	Below the limit
47	0.13	0.5	Below the limit
48	0.24	0.5	Below the limit
49	0.32	0.5	Below the limit
50	0.09	0.5	Below the limit
51	0.11	0.5	Below the limit
52	0.12	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 21, 2026
Mechanical delousing1 pen
Week 20, 2026
Mechanical delousing3 pens
Week 7, 2026
Medicinal bath1 pen · Azamethiphos
Week 6, 2026
Medicinal bath4 pens · Azamethiphos

Show all 27

Week 2, 2026
Thermal delousing5 pens
Week 50, 2025
Mechanical delousing2 pens
Week 49, 2025
Mechanical delousing5 pens
Week 45, 2025
Thermal delousing6 pens
Week 44, 2025
Thermal delousing2 pens
Week 42, 2025
Thermal delousingWhole site
Week 37, 2025
Thermal delousing4 pens
Week 34, 2025
Thermal delousingWhole site
Week 26, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 25, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 28, 2024
Mechanical delousing3 pens
Week 27, 2024
Mechanical delousing2 pens
Week 26, 2024
Thermal delousing2 pens
Week 25, 2024
Thermal delousing1 pen
Week 22, 2024
Mechanical delousing4 pens
Week 16, 2024
Freshwater treatment1 pen
Week 15, 2024
Freshwater treatment4 pens
Week 14, 2024
Freshwater treatment2 pens
Week 50, 2023
Thermal delousing7 pens
Week 49, 2023
Thermal delousing1 pen
Week 45, 2023
Thermal delousing5 pens
Week 41, 2023
Mechanical delousing4 pens
Week 40, 2023
Mechanical delousing3 pens

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

23 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
16 Jun 2026	Ronja Havsoy	Hestøy	2 h 8 min
16 Jun 2026	Ronja Havsoy	Hestøy	3 h 2 min
19 May 2026	Ro North	Hestøy	1 h 19 min
18 May 2026	Ro North	Hestøy	3 h 14 min
18 May 2026	Steinar Olaisen	Teksmona	6 h 9 min
16 May 2026	Steinar Olaisen	Teksmona	25 h 50 min
11 Mar 2026	Ro North	Hestøy	2 h 9 min
11 Mar 2026	Ro North	Mulnesodden	1 h 24 min
09 Feb 2026	Ro North	Hestøy	1 h 19 min
09 Feb 2026	Ro North	Hestøy	2 h 14 min
08 Feb 2026	Ro North	Hestøy	2 h 39 min
08 Feb 2026	Ro North	Hestøy	1 h 33 min

Show 40 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
08 Feb 2026	Ro North	Hestøy	1 h 23 min
07 Feb 2026	Ro North	Hestøy	2 h 15 min
07 Feb 2026	Ro North	Hestøy	3 h 33 min
06 Feb 2026	Ro North	Hestøy	2 h 31 min
06 Feb 2026	Ro North	Hestøy	2 h 30 min
06 Feb 2026	Ro North	Hestøy	4 h 14 min
05 Feb 2026	Ro North	Hestøy	7 h 49 min
08 Jan 2026	Ronja Havsoy	Hestøy	1 h 54 min
06 Jan 2026	Ro North	Langskjæran	8 h 6 min
05 Jan 2026	Ro North	Langskjæran	15 h 37 min
04 Jan 2026	Ro North	Langskjæran	7 h 55 min
16 Dec 2025	Ronja Havsoy	Istervika	2 h 27 min
08 Dec 2025	Ronja Heroy	Langskjæran	14 h 41 min
06 Dec 2025	Ronja Heroy	Langskjæran	39 h 24 min
17 Nov 2025	Ro North	Hestøy	6 h 3 min
03 Nov 2025	Ro North	Reinvika	14 h 35 min
16 Oct 2025	Ro North	Kjerkvika	8 h 59 min
14 Sep 2025	Ronja Boroy	Almurden	52 h 0 min
13 Sep 2025	Ronja Boroy	Almurden	8 h 32 min
22 Aug 2025	Ro North	Hestøy	12 h 1 min
21 Aug 2025	Ro North	Hestøy	17 h 14 min
21 Apr 2025	Ro Master	no other farm	2 h 33 min
19 Apr 2025	Ro Master	Bugane	2 h 9 min
17 Apr 2025	Ro Master	Bugane	4 h 3 min
15 Apr 2025	Ro Master	Bugane	3 h 0 min
02 Aug 2024	Ro Spirit	Hestøy	3 h 44 min
01 Aug 2024	Ro Spirit	Hestøy	3 h 51 min
31 Jul 2024	Ro Spirit	Grasholman	3 h 14 min
24 Jul 2024	Ro Spirit	Hestøy	1 h 2 min
23 Jun 2024	Ro North	Havstein Sør	23 h 13 min
01 Jun 2024	Ronja Heroy	Brattholmen disease or zone there	41 h 20 min
31 May 2024	Ronja Heroy	Brattholmen disease or zone there	6 h 22 min
14 Apr 2024	Ronja Heroy	no other farm	11 h 58 min
11 Apr 2024	Ronja Heroy	no other farm	12 h 59 min
09 Apr 2024	Ronja Heroy	no other farm	1 h 19 min
08 Apr 2024	Ronja Heroy	no other farm	3 h 23 min
08 Apr 2024	Ronja Heroy	no other farm	3 h 36 min
07 Apr 2024	Ronja Heroy	no other farm	3 h 47 min
06 Apr 2024	Ronja Heroy	no other farm	9 h 6 min
04 Apr 2024	Ronja Heroy	no other farm	22 h 24 min

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

Licences

Site MAB: 2,340 tonnes

Licence	Type	Capacity	Holder
N HR 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N HR 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N HR 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS

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