Ystevika

Site 13306 · Tjeldsund municipality · Production area 10, Andøya til Senja

Below the lice limit, week 39Operated by Northern Lights Salmon AS

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

2Lice treatments in 2026Latest: Medicinal feed, week 33, 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

10Wellboat visits in 2026by 2 different vessels · latest 23 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	0.08	0.5	Below the limit
2	0.10	0.5	Below the limit
3	0.14	0.5	Below the limit
4	0.16	0.5	Below the limit
5	0.20	0.5	Below the limit
6	0.20	0.5	Below the limit
7	unknown	0.5	Reported without a count
8	unknown	0.5	Reported without a count
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	unknown	0.5	Not reported
18	unknown	0.5	Not reported
19	unknown	0.5	Not reported
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	0.00	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	0.01	0.5	Below the limit
32	0.04	0.5	Below the limit
33	0.01	0.5	Below the limit
34	0.04	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.01	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.00	0.5	Below the limit

Earlier years

20250 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	0.05	0.5	Below the limit
2	0.06	0.5	Below the limit
3	0.09	0.5	Below the limit
4	0.08	0.5	Below the limit
5	0.10	0.5	Below the limit
6	0.09	0.5	Below the limit
7	0.08	0.5	Below the limit
8	0.06	0.5	Below the limit
9	0.07	0.5	Below the limit
10	0.06	0.5	Below the limit
11	0.04	0.5	Below the limit
12	0.04	0.5	Below the limit
13	0.04	0.5	Below the limit
14	0.04	0.5	Below the limit
15	0.03	0.5	Below the limit
16	0.03	0.5	Below the limit
17	0.03	0.5	Below the limit
18	0.04	0.5	Below the limit
19	0.03	0.5	Below the limit
20	0.05	0.5	Below the limit
21	0.06	0.2	Below the limit
22	0.04	0.2	Below the limit
23	0.05	0.2	Below the limit
24	0.04	0.2	Below the limit
25	0.04	0.2	Below the limit
26	0.04	0.2	Below the limit
27	0.04	0.5	Below the limit
28	0.03	0.5	Below the limit
29	0.04	0.5	Below the limit
30	0.05	0.5	Below the limit
31	0.09	0.5	Below the limit
32	0.10	0.5	Below the limit
33	0.07	0.5	Below the limit
34	0.09	0.5	Below the limit
35	0.09	0.5	Below the limit
36	0.09	0.5	Below the limit
37	0.13	0.5	Below the limit
38	0.22	0.5	Below the limit
39	0.24	0.5	Below the limit
40	0.26	0.5	Below the limit
41	0.25	0.5	Below the limit
42	0.34	0.5	Below the limit
43	0.38	0.5	Below the limit
44	0.36	0.5	Below the limit
45	0.13	0.5	Below the limit
46	0.03	0.5	Below the limit
47	0.03	0.5	Below the limit
48	0.03	0.5	Below the limit
49	0.04	0.5	Below the limit
50	0.04	0.5	Below the limit
51	0.06	0.5	Below the limit
52	0.06	0.5	Below the limit

20240 of 43 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	0.03	0.5	Below the limit
2	0.04	0.5	Below the limit
3	0.07	0.5	Below the limit
4	0.02	0.5	Below the limit
5	0.02	0.5	Below the limit
6	0.05	0.5	Below the limit
7	0.06	0.5	Below the limit
8	0.07	0.5	Below the limit
9	0.07	0.5	Below the limit
10	unknown	0.5	Reported without a count
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	unknown	0.5	Not reported
18	unknown	0.5	Not reported
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	0.00	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	0.01	0.5	Below the limit
32	0.01	0.5	Below the limit
33	0.01	0.5	Below the limit
34	0.03	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.02	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
40	0.06	0.5	Below the limit
41	0.07	0.5	Below the limit
42	0.15	0.5	Below the limit
43	0.16	0.5	Below the limit
44	0.12	0.5	Below the limit
45	0.07	0.5	Below the limit
46	0.04	0.5	Below the limit
47	0.06	0.5	Below the limit
48	0.07	0.5	Below the limit
49	0.07	0.5	Below the limit
50	0.03	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.06	0.5	Below the limit

20231 of 16 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
37	0.25	0.5	Below the limit
38	0.30	0.5	Below the limit
39	0.10	0.5	Below the limit
40	0.11	0.5	Below the limit
41	0.11	0.5	Below the limit
42	0.11	0.5	Below the limit
43	0.08	0.5	Below the limit
44	0.06	0.5	Below the limit
45	0.21	0.5	Below the limit
46	0.30	0.5	Below the limit
47	0.48	0.5	Near the limit
48	0.56	0.5	Above the limit
49	0.34	0.5	Below the limit
50	0.10	0.5	Below the limit
51	0.10	0.5	Below the limit
52	0.03	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 33, 2026
Medicinal feedWhole site · Emamectin benzoat
Week 32, 2026
Medicinal feedWhole site · Emamectin benzoat
Week 45, 2025
Mechanical delousing4 pens
Week 51, 2024
Medicinal feed1 pen · Emamectin benzoat

Show all 12

Week 50, 2024
Medicinal feed1 pen · Emamectin benzoat
Week 45, 2024
Thermal delousing, Mechanical delousing2 pens
Week 44, 2024
Medicinal feed3 pens · Emamectin benzoat
Week 43, 2024
Medicinal feed3 pens · Emamectin benzoat
Week 32, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 31, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 49, 2023
Medicinal bathWhole site · Deltamethrin
Week 39, 2023
Freshwater treatment, Thermal delousing6 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

10 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
23 Aug 2026	Caspian	Hallvardsøya	6 h 46 min
16 May 2026	Caspian	Trollvika	4 h 50 min
15 May 2026	Caspian	Trollvika	2 h 43 min
21 Feb 2026	Caspian	Alsvåg	3 h 7 min
10 Feb 2026	Grotanger	Ånderkleiva	4 h 13 min
07 Feb 2026	Grotanger	Alsvåg	3 h 28 min
31 Jan 2026	Grotanger	Brattberg	3 h 42 min
25 Jan 2026	Grotanger	Rotvika	5 h 56 min
21 Jan 2026	Grotanger	Salangslia	2 h 52 min
16 Jan 2026	Grotanger	Salangslia	5 h 32 min
06 Dec 2025	Caspian	Brattberg	4 h 9 min
17 Nov 2025	Caspian	Rotvika	4 h 46 min

Show 18 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
10 Nov 2025	Grotanger	Rotvika	3 h 4 min
03 Nov 2025	Bjorg Pauline	Brottøy	15 h 57 min
26 Oct 2025	Caspian	Skjærvika	3 h 15 min
20 Oct 2025	Grotanger	Rotvika	4 h 22 min
12 Oct 2025	Doennland	Hallarnes	57 min
07 Oct 2025	Doennland	Breivoll	4 h 4 min
06 Oct 2025	Doennland	Kjøtta V	3 h 14 min
15 Sep 2025	Grotanger	Brattberg	3 h 33 min
07 Sep 2025	Caspian	Skjærvika	6 h 45 min
09 Aug 2025	Grotanger	Rotvika	7 h 34 min
27 Jul 2025	Caspian	Kjøtta V	5 h 4 min
23 Jun 2025	Caspian	Eidisholman	2 h 37 min
15 Oct 2024	Viknatrans	Mulingen	12 h 14 min
15 Oct 2024	Viknatrans	Mulingen	5 h 47 min
10 May 2024	Grotanger	Trollvika	4 h 5 min
08 May 2024	Grotanger	Trollvika	7 h 40 min
25 Feb 2024	Grotanger	Rotvika	3 h 23 min
13 Feb 2024	Grotanger	Alsvåg	2 h 42 min

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

Licences

Site MAB: 4,500 tonnes

Licence	Type	Capacity	Holder
T I 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Sørrollnesfisk AS
T I 0016	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Sørrollnesfisk AS
T I 0017	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Sørrollnesfisk AS
T KN 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS
T KN 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS
T SK 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS
T SK 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	974 t	Northern Lights Salmon AS

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