Slåttvika

Site 13000 · Brønnøy municipality · Production area 8, Helgeland til Bodø

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

0.21Adult 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 12 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

2Lice treatments in 2026Latest: Thermal delousing, week 37, 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

9Wellboat visits in 2026by 1 vessel · latest 07 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	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	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	0.00	0.5	Below the limit
29	0.03	0.5	Below the limit
30	0.03	0.5	Below the limit
31	0.05	0.5	Below the limit
32	0.03	0.5	Below the limit
33	0.06	0.5	Below the limit
34	0.14	0.5	Below the limit
35	0.15	0.5	Below the limit
36	0.06	0.5	Below the limit
37	0.05	0.5	Below the limit
38	0.03	0.5	Below the limit
39	0.21	0.5	Below the limit

Earlier years

20252 of 16 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	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	0.00	0.5	Below the limit
28	0.00	0.5	Below the limit
29	0.04	0.5	Below the limit
30	0.29	0.5	Below the limit
31	0.21	0.5	Below the limit
32	0.22	0.5	Below the limit
33	0.36	0.5	Below the limit
34	0.44	0.5	Near the limit
35	0.11	0.5	Below the limit
36	0.11	0.5	Below the limit
37	0.41	0.5	Near the limit
38	0.97	0.5	Above the limit
39	0.85	0.5	Above the limit
40	0.20	0.5	Below the limit
41	0.35	0.5	Below the limit
42	0.42	0.5	Near the limit
43	unknown	0.5	Reported without a count
44	unknown	0.5	Reported without a count
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

20244 of 25 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	Reported without a count
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	0.02	0.2	Below the limit
26	0.03	0.2	Below the limit
27	0.08	0.5	Below the limit
28	0.11	0.5	Below the limit
29	0.18	0.5	Below the limit
30	0.24	0.5	Below the limit
31	0.39	0.5	Below the limit
32	0.07	0.5	Below the limit
33	0.46	0.5	Near the limit
34	0.08	0.5	Below the limit
35	0.22	0.5	Below the limit
36	0.28	0.5	Below the limit
37	0.43	0.5	Near the limit
38	1.07	0.5	Above the limit
39	1.83	0.5	Above the limit
40	1.39	0.5	Above the limit
41	2.42	0.5	Above the limit
42	unknown	0.5	Reported without a count
43	unknown	0.5	Reported without a count
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 12 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	0.29	0.5	Below the limit
41	0.24	0.5	Below the limit
42	0.04	0.5	Below the limit
43	0.15	0.5	Below the limit
44	0.12	0.5	Below the limit
45	0.09	0.5	Below the limit
46	0.13	0.5	Below the limit
47	0.00	0.5	Below the limit
48	0.18	0.5	Below the limit
49	0.18	0.5	Below the limit
50	0.19	0.5	Below the limit
51	0.20	0.5	Below the limit
52	unknown	0.5	Reported without a count

Treatments

Norwegian Food Safety Authority

Week 37, 2026
Thermal delousing1 pen
Week 36, 2026
Thermal delousing5 pens
Week 39, 2025
Mechanical delousing3 pens
Week 38, 2025
Mechanical delousing2 pens

Show all 11

Week 35, 2025
Mechanical delousingWhole site
Week 31, 2025
Thermal delousingWhole site
Week 39, 2024
Mechanical delousing1 pen
Week 34, 2024
Mechanical delousingWhole site
Week 32, 2024
Mechanical delousing4 pens
Week 31, 2024
Mechanical delousing4 pens
Week 41, 2023
Mechanical delousing2 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

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
07 Sep 2026	Ronja Boroy	Reinvika	2 h 16 min
06 Sep 2026	Ronja Boroy	Reinvika	22 h 3 min
05 Sep 2026	Ronja Boroy	Reinvika	18 h 13 min
04 Sep 2026	Ronja Boroy	Reinvika	15 h 4 min
09 Jul 2026	Ronja Boroy	Istervika	7 h 35 min
08 Jul 2026	Ronja Boroy	Istervika	4 h 0 min
08 Jul 2026	Ronja Boroy	Istervika	1 h 33 min
07 Jul 2026	Ronja Boroy	Istervika	1 h 50 min
07 Jul 2026	Ronja Boroy	Istervika	2 h 40 min
29 Oct 2025	Ronja Havsoy	Hestøy	2 h 49 min
28 Oct 2025	Ronja Havsoy	Skauholmen	2 h 25 min
23 Oct 2025	Ronja Havsoy	Hestøy	1 h 41 min

Show 30 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
23 Oct 2025	Ronja Havsoy	Skauholmen	3 h 55 min
20 Oct 2025	Ronja Havsoy	Hestøy	1 h 15 min
16 Oct 2025	Ronja Havsoy	Breivika S	3 h 1 min
02 Oct 2025	Ronja Heroy	Kjelneset	19 h 47 min
30 Jul 2025	Ronja Boroy	Istervika	5 h 45 min
28 Jul 2025	Ronja Boroy	Istervika	33 h 32 min
04 Jul 2025	Ronja Heroy	Istervika	2 h 7 min
04 Jul 2025	Ronja Heroy	Istervika	2 h 26 min
03 Jul 2025	Ronja Heroy	Istervika	2 h 13 min
03 Jul 2025	Ronja Heroy	Istervika	2 h 10 min
02 Jul 2025	Ronja Heroy	Istervika	1 h 40 min
01 Jul 2025	Ronja Heroy	Istervika	1 h 57 min
22 Oct 2024	Ro Master	Hestøy	1 h 51 min
20 Oct 2024	Ro Master	Hestøy	3 h 23 min
17 Oct 2024	Norwegian Gannet	Store Teistholmen Ø	10 h 39 min
17 Oct 2024	Ro Master	Hestøy	3 h 11 min
13 Oct 2024	Ro Master	Hestøy	2 h 29 min
10 Oct 2024	Ro Master	Hestøy	2 h 33 min
08 Oct 2024	Ro Master	Hestøy	4 h 22 min
01 Oct 2024	Ro Master	Hestøy	7 h 32 min
23 Aug 2024	Ronja Heroy	Storstrompan	20 h 19 min
21 Aug 2024	Ronja Heroy	Storstrompan	24 h 56 min
05 Aug 2024	Ronja Heroy	Vedøya	43 h 44 min
04 Aug 2024	Ronja Heroy	Vedøya	15 h 20 min
03 Aug 2024	Ronja Heroy	Vedøya	5 h 38 min
14 May 2024	Ro North	Hamnsundet I	1 h 19 min
13 May 2024	Ro North	Hamnsundet I	2 h 41 min
02 May 2024	Ro North	Marøya	1 h 28 min
22 Apr 2024	Ro North	Hamnsundet I	2 h 19 min
03 Jan 2024	Ronja Havsoy	Hestøy	2 h 39 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 AH 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N BR 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N BR 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N BR 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N BR 0017	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N DA 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
N L 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS

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