Brensholmen

Site 37357 · Tromsø municipality · Production area 10, Andøya til Senja

Below the lice limit, week 39Operated by Salmar Oppdrett AS · group SalMar

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 26 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

14Wellboat visits in 2026by 5 different vessels · latest 17 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

Show as table

Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.24	0.5	Below the limit
2	0.21	0.5	Below the limit
3	0.23	0.5	Below the limit
4	0.24	0.5	Below the limit
5	0.22	0.5	Below the limit
6	0.18	0.5	Below the limit
7	0.41	0.5	Near the limit
8	0.28	0.5	Below the limit
9	0.26	0.5	Below the limit
10	0.19	0.5	Below the limit
11	0.19	0.5	Below the limit
12	0.47	0.5	Near the limit
13	0.34	0.5	Below the limit
14	0.28	0.5	Below the limit
15	0.26	0.5	Below the limit
16	0.30	0.5	Below the limit
17	0.28	0.5	Below the limit
18	0.18	0.5	Below the limit
19	0.20	0.5	Below the limit
20	0.13	0.5	Below the limit
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	0.00	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.01	0.5	Below the limit

Earlier years

20251 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

Show as table

Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.28	0.5	Below the limit
2	0.12	0.5	Below the limit
3	0.11	0.5	Below the limit
4	0.19	0.5	Below the limit
5	0.18	0.5	Below the limit
6	0.13	0.5	Below the limit
7	0.32	0.5	Below the limit
8	0.16	0.5	Below the limit
9	0.24	0.5	Below the limit
10	0.23	0.5	Below the limit
11	0.21	0.5	Below the limit
12	0.23	0.5	Below the limit
13	0.23	0.5	Below the limit
14	0.26	0.5	Below the limit
15	0.31	0.5	Below the limit
16	0.28	0.5	Below the limit
17	0.34	0.5	Below the limit
18	0.34	0.5	Below the limit
19	0.35	0.5	Below the limit
20	0.21	0.5	Below the limit
21	0.14	0.2	Below the limit
22	0.13	0.2	Below the limit
23	0.17	0.2	Near the limit
24	0.12	0.2	Below the limit
25	0.24	0.2	Above the limit
26	0.05	0.2	Below the limit
27	0.08	0.5	Below the limit
28	0.12	0.5	Below the limit
29	0.12	0.5	Below the limit
30	0.21	0.5	Below the limit
31	0.26	0.5	Below the limit
32	0.27	0.5	Below the limit
33	0.06	0.5	Below the limit
34	0.11	0.5	Below the limit
35	0.15	0.5	Below the limit
36	0.37	0.5	Below the limit
37	0.10	0.5	Below the limit
38	0.17	0.5	Below the limit
39	0.24	0.5	Below the limit
40	0.33	0.5	Below the limit
41	0.11	0.5	Below the limit
42	0.07	0.5	Below the limit
43	0.31	0.5	Below the limit
44	0.36	0.5	Below the limit
45	0.33	0.5	Below the limit
46	0.40	0.5	Near the limit
47	0.41	0.5	Near the limit
48	0.34	0.5	Below the limit
49	0.39	0.5	Below the limit
50	0.28	0.5	Below the limit
51	0.19	0.5	Below the limit
52	0.14	0.5	Below the limit

20240 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

Show as table

Adult female lice per fish per week, 2024
Week	Adult female lice per fish	Lice limit	Status
1	0.34	0.5	Below the limit
2	0.43	0.5	Near the limit
3	0.41	0.5	Near the limit
4	unknown	0.5	Reported without a count
5	0.37	0.5	Below the limit
6	unknown	0.5	Reported without a count
7	0.33	0.5	Below the limit
8	unknown	0.5	Reported without a count
9	0.37	0.5	Below the limit
10	unknown	0.5	Reported without a count
11	0.41	0.5	Near the limit
12	0.40	0.5	Near the limit
13	0.38	0.5	Below the limit
14	0.37	0.5	Below the limit
15	unknown	0.5	Reported without a count
16	0.38	0.5	Below the limit
17	0.33	0.5	Below the limit
18	0.39	0.5	Below the limit
19	0.42	0.5	Near the limit
20	0.44	0.5	Near the limit
21	unknown	0.2	Reported without a count
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	0.00	0.5	Below the limit
34	0.00	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.01	0.5	Below the limit
38	0.02	0.5	Below the limit
39	0.05	0.5	Below the limit
40	0.06	0.5	Below the limit
41	0.03	0.5	Below the limit
42	0.09	0.5	Below the limit
43	0.05	0.5	Below the limit
44	0.12	0.5	Below the limit
45	0.07	0.5	Below the limit
46	0.06	0.5	Below the limit
47	0.16	0.5	Below the limit
48	0.17	0.5	Below the limit
49	0.09	0.5	Below the limit
50	0.12	0.5	Below the limit
51	0.24	0.5	Below the limit
52	0.20	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

Show as table

Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.31	0.5	Below the limit
41	0.17	0.5	Below the limit
42	0.23	0.5	Below the limit
43	0.33	0.5	Below the limit
44	0.11	0.5	Below the limit
45	0.21	0.5	Below the limit
46	0.23	0.5	Below the limit
47	0.28	0.5	Below the limit
48	0.21	0.5	Below the limit
49	0.37	0.5	Below the limit
50	0.36	0.5	Below the limit
51	0.48	0.5	Near the limit
52	0.43	0.5	Near the limit

Treatments

Norwegian Food Safety Authority

Week 50, 2025
Mechanical delousing5 pens
Week 49, 2025
Mechanical delousing1 pen
Week 48, 2025
Mechanical delousing2 pens
Week 45, 2025
Mechanical delousing2 pens

Show all 16

Week 44, 2025
Mechanical delousing5 pens
Week 41, 2025
Mechanical delousing2 pens
Week 40, 2025
Mechanical delousing5 pens
Week 37, 2025
Mechanical delousing7 pens
Week 33, 2025
Mechanical delousing7 pens
Week 20, 2025
Mechanical delousing5 pens
Week 2, 2025
Mechanical delousing3 pens
Week 38, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 3, 2024
Other treatment4 pens · Thermolicer, Optiflush
Week 44, 2023
Other treatment4 pens · Optiflush
Week 41, 2023
Other treatment2 pens · Optiflush
Week 40, 2023
Other treatment1 pen · Optiflush

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

14 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
17 Aug 2026	Ronja Aurora	Trettevik disease or zone there	7 h 2 min
20 May 2026	Ro Senja	Klubben	1 h 45 min
15 May 2026	Ro Fjell	Klubben	3 h 27 min
15 May 2026	Ro Fjell	Hestøy	4 h 38 min
27 Apr 2026	Ro Master	Holmen	3 h 0 min
19 Apr 2026	Ro Senja	Klubben	2 h 10 min
14 Apr 2026	Ro Master	Holmen	3 h 33 min
05 Apr 2026	Ro Senja	Klubben	3 h 12 min
12 Mar 2026	Ronja Aurora	Klubben	2 h 51 min
10 Mar 2026	Ronja Aurora	Klubben	5 h 46 min
17 Feb 2026	Ronja Aurora	Klubben	3 h 15 min
10 Feb 2026	Ronja Aurora	Store Kobbøy	7 h 14 min

Show 36 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
17 Jan 2026	Ronja Aurora	Klubben	7 h 28 min
02 Jan 2026	Aasvaerfjord	Klubben	3 h 35 min
19 Dec 2025	Tonny	Mjøsund Vest	1 h 58 min
11 Dec 2025	Ro Master	Skaret	2 h 26 min
11 Dec 2025	Ro Senja	Klubben	9 h 7 min
10 Dec 2025	Ro Senja	Klubben	18 h 16 min
08 Dec 2025	Ro Senja	Klubben	32 h 47 min
06 Dec 2025	Ro Senja	Ytre Baltsfjord	18 h 46 min
28 Nov 2025	Ro Senja	Lubben	28 h 2 min
13 Nov 2025	Ro Senja	Skogshamn	3 h 20 min
03 Nov 2025	Froy Odin	Klubben	22 h 34 min
06 Oct 2025	Ro Senja	Øyra	23 h 49 min
04 Oct 2025	Ro Senja	Baltsfjord	51 min
03 Oct 2025	Ro Senja	Baltsfjord	22 h 6 min
02 Oct 2025	Ro Senja	Baltsfjord	18 h 27 min
01 Oct 2025	Ro Senja	Baltsfjord	18 h 54 min
08 Sep 2025	Ro Senja	Indre Bringenes	42 h 32 min
30 Aug 2025	Tonny	Anevik	1 h 6 min
16 Aug 2025	Ro Senja	Baltsfjord	35 h 2 min
13 Aug 2025	Ro Senja	Klubben	41 h 12 min
16 May 2025	Ro Senja	Klubben	20 h 31 min
16 Aug 2024	Ronja Aurora	Kvingra	1 h 18 min
12 Aug 2024	Ronja Aurora	Kvingra	5 h 54 min
01 Jun 2024	Froy Odin	Klubben	2 h 55 min
21 May 2024	Ro Master	Holmen	1 h 56 min
19 May 2024	Ro Senja	Klubben	2 h 47 min
18 May 2024	Ro Senja	Salatskjæra	3 h 4 min
23 Apr 2024	Ro Arctic	Skjervøy	3 h 15 min
21 Apr 2024	Ro Arctic	Holmen	3 h 2 min
17 Apr 2024	Ro Sailor	Klubben	2 h 20 min
16 Apr 2024	Ro Sailor	Klubben	6 h 18 min
14 Apr 2024	Ro Sailor	Klubben	2 h 19 min
30 Mar 2024	Aasvaerfjord	Kråkeberget	2 h 20 min
10 Mar 2024	Aasvaerfjord	Klubben	7 h 4 min
25 Jan 2024	Ronja Aurora	Øyra	4 h 10 min
16 Jan 2024	Ro Arctic	Larstangen	20 h 40 min

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

Licences

Site MAB: 5,670 tonnes

Licence	Type	Capacity	Holder
T LK 0003	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0026	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0031	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0032	Kommersiell / matfisk-grønn bSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T LK 0033	Kommersiell / matfisk-grønn aSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T T 0003	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS
T T 0007	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	974 t	Salmar Oppdrett AS

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