Matvika

Site 36117 · Sørfold municipality · Production area 9, Vestfjorden og Vesterålen

Below the lice limit, week 39Operated by Mowi Seawater Norway AS · group Mowi

0.17Adult 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 39 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

4Lice treatments in 2026Latest: Mechanical delousing, week 38, 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

20Wellboat visits in 2026by 6 different vessels · latest 12 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 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

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Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.03	0.5	Below the limit
2	0.03	0.5	Below the limit
3	0.03	0.5	Below the limit
4	0.04	0.5	Below the limit
5	0.03	0.5	Below the limit
6	0.02	0.5	Below the limit
7	0.02	0.5	Below the limit
8	0.02	0.5	Below the limit
9	0.01	0.5	Below the limit
10	0.02	0.5	Below the limit
11	0.02	0.5	Below the limit
12	0.02	0.5	Below the limit
13	0.01	0.5	Below the limit
14	0.01	0.5	Below the limit
15	0.01	0.5	Below the limit
16	0.01	0.5	Below the limit
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	0.01	0.2	Below the limit
23	0.01	0.2	Below the limit
24	0.01	0.2	Below the limit
25	0.01	0.2	Below the limit
26	0.01	0.2	Below the limit
27	0.00	0.5	Below the limit
28	0.07	0.5	Below the limit
29	0.07	0.5	Below the limit
30	0.10	0.5	Below the limit
31	0.12	0.5	Below the limit
32	0.40	0.5	Near the limit
33	0.27	0.5	Below the limit
34	0.16	0.5	Below the limit
35	0.14	0.5	Below the limit
36	0.16	0.5	Below the limit
37	0.31	0.5	Below the limit
38	0.21	0.5	Below the limit
39	0.17	0.5	Below the limit

Earlier years

20250 of 19 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	0.02	0.5	Below the limit
2	0.01	0.5	Below the limit
3	0.08	0.5	Below the limit
4	0.18	0.5	Below the limit
5	0.20	0.5	Below the limit
6	0.22	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	unknown	0.5	Not reported
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	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	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	0.00	0.5	Below the limit
48	0.03	0.5	Below the limit
49	0.03	0.5	Below the limit
50	0.05	0.5	Below the limit
51	0.06	0.5	Below the limit
52	0.06	0.5	Below the limit

20243 of 32 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	0.5	Not reported
17	unknown	0.5	Not reported
18	unknown	0.5	Not reported
19	unknown	0.5	Not reported
20	unknown	0.5	Not reported
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	0.01	0.2	Below the limit
26	0.00	0.2	Below the limit
27	0.01	0.5	Below the limit
28	0.02	0.5	Below the limit
29	0.03	0.5	Below the limit
30	0.14	0.5	Below the limit
31	0.19	0.5	Below the limit
32	0.40	0.5	Near the limit
33	0.47	0.5	Near the limit
34	2.53	0.5	Above the limit
35	1.60	0.5	Above the limit
36	0.39	0.5	Below the limit
37	0.19	0.5	Below the limit
38	0.49	0.5	Near the limit
39	2.95	0.5	Above the limit
40	0.28	0.5	Below the limit
41	0.29	0.5	Below the limit
42	0.33	0.5	Below the limit
43	0.18	0.5	Below the limit
44	0.14	0.5	Below the limit
45	0.15	0.5	Below the limit
46	0.28	0.5	Below the limit
47	0.26	0.5	Below the limit
48	0.14	0.5	Below the limit
49	0.01	0.5	Below the limit
50	0.01	0.5	Below the limit
51	0.01	0.5	Below the limit
52	0.01	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 38, 2026
Mechanical delousing5 pens
Week 37, 2026
Mechanical delousing2 pens
Week 33, 2026
Mechanical delousing3 pens
Week 32, 2026
Thermal delousing5 pens

Show all 14

Week 44, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 49, 2024
Mechanical delousing5 pens
Week 48, 2024
Mechanical delousing2 pens
Week 44, 2024
Mechanical delousing4 pens
Week 43, 2024
Mechanical delousing5 pens
Week 40, 2024
Mechanical delousingWhole site
Week 37, 2024
Thermal delousing3 pens
Week 36, 2024
Thermal delousing, Mechanical delousing8 pens
Week 35, 2024
Mechanical delousing7 pens
Week 30, 2024
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

20 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
12 Sep 2026	Ronja Heroy	Kines	17 h 43 min
01 Sep 2026	Ro North	Hestøy	1 h 13 min
31 Aug 2026	Ro North	Hestøy	3 h 0 min
27 Aug 2026	Froey Viking	Skauholmen	2 h 22 min
26 Aug 2026	Ro Fortune	Skauholmen	1 h 49 min
26 Aug 2026	Robris	Sjåneset	1 h 52 min
25 Aug 2026	Ro North	Hestøy	2 h 57 min
24 Aug 2026	Ro North	Marøya	2 h 45 min
16 Aug 2026	Ronja Heroy	Storvikneset	12 h 0 min
15 Aug 2026	Ronja Heroy	Storvikneset	8 h 37 min
07 Aug 2026	Ronja Boroy	Hestøy	47 h 7 min
24 Jun 2026	Ronja Boroy	Nedre Kvarv	9 h 53 min

Show 41 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
24 Jun 2026	Ronja Boroy	Nedre Kvarv	1 h 54 min
23 Jun 2026	Ronja Boroy	Nedre Kvarv	9 h 50 min
23 Jun 2026	Ronja Boroy	Nedre Kvarv	7 h 26 min
23 Jun 2026	Ronja Boroy	Nedre Kvarv	3 h 22 min
21 Jun 2026	Ronja Boroy	Nedre Kvarv	9 h 18 min
20 Jun 2026	Ronja Boroy	Nedre Kvarv	8 h 45 min
20 Jun 2026	Ronja Boroy	Nedre Kvarv	8 h 12 min
19 Jun 2026	Ronja Boroy	Nedre Kvarv	19 h 2 min
29 Sep 2025	Ronja Havsoy	Nedre Kvarv	2 h 36 min
28 Sep 2025	Ronja Havsoy	Nedre Kvarv	14 h 21 min
26 Sep 2025	Ronja Havsoy	Nedre Kvarv	3 h 9 min
24 Sep 2025	Ronja Havsoy	Nedre Kvarv	13 h 21 min
23 Sep 2025	Ronja Havsoy	Nedre Kvarv	1 h 54 min
20 Feb 2025	Ronja Havsoy	Hestøy	2 h 44 min
12 Feb 2025	Ronja Havsoy	Hestøy	2 h 23 min
10 Feb 2025	Ronja Havsoy	Hestøy	2 h 43 min
07 Feb 2025	Ronja Havsoy	Klubben	3 h 11 min
02 Jan 2025	Froy Jarl	no other farm	1 h 26 min
28 Dec 2024	Ro Master	Hestøy	4 h 47 min
22 Dec 2024	Ro Master	Hestøy	3 h 42 min
04 Dec 2024	Ronja Heroy	Kalvik	9 h 57 min
03 Dec 2024	Ronja Heroy	Kalvik	15 h 9 min
01 Dec 2024	Ronja Heroy	Kalvik	9 h 44 min
30 Nov 2024	Ronja Heroy	Kalvik	9 h 52 min
27 Nov 2024	Ro Master	Hestøy	2 h 54 min
21 Nov 2024	Ro Master	Hestøy	1 h 39 min
20 Oct 2024	Ronja Maloy	Kviteberg	7 h 49 min
02 Oct 2024	Ronja Heroy	Kviteberg	38 h 8 min
01 Oct 2024	Ronja Heroy	Kviteberg	5 h 29 min
30 Sep 2024	Ronja Heroy	Kviteberg	15 h 51 min
09 Sep 2024	Ro North	Kalvik	6 h 23 min
08 Sep 2024	Ro North	Kalvik	22 h 23 min
07 Sep 2024	Ro North	Kalvik	12 h 4 min
26 Jul 2024	Ro North	Kalvik	18 h 17 min
25 Jul 2024	Ro North	Kalvik	7 h 53 min
16 Jul 2024	Ro North	Jektvika I	11 h 56 min
13 Jun 2024	Ro North	Jektvika I	3 h 34 min
12 Jun 2024	Ro North	Jektvika I	8 h 50 min
12 Jun 2024	Ro North	Jektvika I	2 h 46 min
30 May 2024	Ro North	Jektvika I	52 min
15 May 2024	Ro North	Jektvika I	1 h 11 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
N HR 0018	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N HR 0020	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N L 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,362 t	Lovundlaks Sjø AS
N SF 0008	Kommersiell / matfiskSalmon, Rainbow trout, Trout	831 t	Mowi Seawater Norway AS
N SF 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0012	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS

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