Årnes

Site 24695 · Namsos municipality · Production area 7, Nord-Trøndelag med Bindal

Status unknown: not reported in week 39Operated by Salmar Oppdrett AS · group SalMar

unknownAdult female lice per fishNo count in week 39. Latest: 0.48 in week 37, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 37 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

17Lice treatments in 2026Latest: Mechanical delousing, week 34, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Active disease casesILA, confirmed 17 Sep 2026Register since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

54Wellboat visits in 2026by 6 different vessels · latest 23 Aug 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

11Escapes reported1-10 salmon, June 2026Since 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 16–21 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	0.37	0.5	Below the limit
2	0.46	0.5	Near the limit
3	0.39	0.5	Below the limit
4	0.42	0.5	Near the limit
5	0.15	0.5	Below the limit
6	0.20	0.5	Below the limit
7	0.16	0.5	Below the limit
8	0.19	0.5	Below the limit
9	0.13	0.5	Below the limit
10	0.13	0.5	Below the limit
11	0.14	0.5	Below the limit
12	0.11	0.5	Below the limit
13	0.09	0.5	Below the limit
14	0.07	0.5	Below the limit
15	0.10	0.5	Below the limit
16	0.16	0.2	Below the limit
17	0.18	0.2	Near the limit
18	0.16	0.2	Below the limit
19	0.17	0.2	Near the limit
20	0.11	0.2	Below the limit
21	0.11	0.2	Below the limit
22	0.11	0.5	Below the limit
23	0.14	0.5	Below the limit
24	0.14	0.5	Below the limit
25	0.11	0.5	Below the limit
26	0.20	0.5	Below the limit
27	0.15	0.5	Below the limit
28	0.19	0.5	Below the limit
29	0.25	0.5	Below the limit
30	0.26	0.5	Below the limit
31	0.44	0.5	Near the limit
32	0.36	0.5	Below the limit
33	0.43	0.5	Near the limit
34	0.29	0.5	Below the limit
35	0.34	0.5	Below the limit
36	0.34	0.5	Below the limit
37	0.48	0.5	Near the limit
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported

Earlier years

20252 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, 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	0.2	Not reported
17	unknown	0.2	Not reported
18	unknown	0.2	Not reported
19	unknown	0.2	Not reported
20	unknown	0.2	Not reported
21	unknown	0.2	Not reported
22	unknown	0.5	Not reported
23	unknown	0.5	Not reported
24	0.00	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.00	0.5	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	0.01	0.5	Below the limit
31	0.00	0.5	Below the limit
32	0.01	0.5	Below the limit
33	0.01	0.5	Below the limit
34	0.00	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.01	0.5	Below the limit
37	0.02	0.5	Below the limit
38	0.03	0.5	Below the limit
39	0.03	0.5	Below the limit
40	0.04	0.5	Below the limit
41	0.05	0.5	Below the limit
42	0.08	0.5	Below the limit
43	0.15	0.5	Below the limit
44	0.21	0.5	Below the limit
45	0.24	0.5	Below the limit
46	0.30	0.5	Below the limit
47	0.29	0.5	Below the limit
48	0.33	0.5	Below the limit
49	0.58	0.5	Above the limit
50	0.79	0.5	Above the limit
51	0.37	0.5	Below the limit
52	0.36	0.5	Below the limit

20243 of 49 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	0.07	0.5	Below the limit
2	0.14	0.5	Below the limit
3	0.21	0.5	Below the limit
4	0.13	0.5	Below the limit
5	0.23	0.5	Below the limit
6	0.33	0.5	Below the limit
7	0.43	0.5	Near the limit
8	0.43	0.5	Near the limit
9	0.04	0.5	Below the limit
10	0.09	0.5	Below the limit
11	0.11	0.5	Below the limit
12	0.11	0.5	Below the limit
13	0.07	0.5	Below the limit
14	0.07	0.5	Below the limit
15	0.10	0.5	Below the limit
16	0.10	0.2	Below the limit
17	0.13	0.2	Below the limit
18	0.07	0.2	Below the limit
19	0.15	0.2	Below the limit
20	0.11	0.2	Below the limit
21	0.13	0.2	Below the limit
22	0.27	0.5	Below the limit
23	0.14	0.5	Below the limit
24	0.11	0.5	Below the limit
25	0.20	0.5	Below the limit
26	0.24	0.5	Below the limit
27	0.23	0.5	Below the limit
28	0.38	0.5	Below the limit
29	0.47	0.5	Near the limit
30	1.05	0.5	Above the limit
31	2.63	0.5	Above the limit
32	0.28	0.5	Below the limit
33	1.00	0.5	Above the limit
34	0.17	0.5	Below the limit
35	0.23	0.5	Below the limit
36	0.31	0.5	Below the limit
37	0.43	0.5	Near the limit
38	0.14	0.5	Below the limit
39	0.45	0.5	Near the limit
40	0.42	0.5	Near the limit
41	0.15	0.5	Below the limit
42	0.34	0.5	Below the limit
43	0.45	0.5	Near the limit
44	0.14	0.5	Below the limit
45	0.22	0.5	Below the limit
46	0.25	0.5	Below the limit
47	0.22	0.5	Below the limit
48	0.40	0.5	Near the limit
49	0.30	0.5	Below the limit
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	0.44	0.5	Near the limit
41	0.28	0.5	Below the limit
42	0.26	0.5	Below the limit
43	0.12	0.5	Below the limit
44	0.16	0.5	Below the limit
45	0.21	0.5	Below the limit
46	0.39	0.5	Below the limit
47	0.22	0.5	Below the limit
48	0.21	0.5	Below the limit
49	0.28	0.5	Below the limit
50	0.27	0.5	Below the limit
51	0.11	0.5	Below the limit
52	0.05	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 34, 2026
Mechanical delousing3 pens
Week 33, 2026
Mechanical delousing2 pens
Week 30, 2026
Mechanical delousing3 pens
Week 29, 2026
Mechanical delousing3 pens

Show all 48

Week 25, 2026
Mechanical delousing5 pens
Week 22, 2026
Mechanical delousing5 pens
Week 20, 2026
Mechanical delousing1 pen
Week 19, 2026
Mechanical delousing4 pens
Week 17, 2026
Mechanical delousing4 pens
Week 16, 2026
Mechanical delousing6 pens
Week 13, 2026
Mechanical delousing1 pen
Week 12, 2026
Mechanical delousing3 pens
Week 11, 2026
Mechanical delousing6 pens
Week 10, 2026
Mechanical delousing1 pen
Week 5, 2026
Other treatment6 pens · FreshWell
Week 4, 2026
Other treatment2 pens · FreshWell
Week 3, 2026
Other treatment4 pens · FreshWell
Week 51, 2025
Mechanical delousing5 pens
Week 50, 2025
Mechanical delousing6 pens
Week 49, 2025
Mechanical delousing1 pen
Week 47, 2024
Mechanical delousing2 pens
Week 44, 2024
Mechanical delousing3 pens
Week 43, 2024
Mechanical delousing2 pens
Week 41, 2024
Mechanical delousing3 pens
Week 40, 2024
Mechanical delousing5 pens
Week 38, 2024
Other treatment9 pens · Hydrolicer
Week 35, 2024
Other treatment10 pens · Optiflush
Week 34, 2024
Other treatment8 pens · Hydrolicer
Week 33, 2024
Other treatment3 pens · Hydrolicer
Week 32, 2024
Other treatment7 pens · Skamik
Week 31, 2024
Other treatment4 pens · Skamik
Week 30, 2024
Other treatment5 pens · Wellfighter
Week 29, 2024
Other treatment6 pens · Wellfighter
Week 27, 2024
Other treatment6 pens · Hydrolicer
Week 26, 2024
Other treatment5 pens · Hydrolicer
Week 24, 2024
Other treatment1 pen · Hydrolicer
Week 23, 2024
Other treatment10 pens · Hydrolicer
Week 21, 2024
Other treatment5 pens · Wellfighter
Week 17, 2024
Other treatment5 pens · Wellfighter
Week 9, 2024
Other treatment8 pens · Optiflush
Week 8, 2024
Other treatment3 pens · Optiflush
Week 51, 2023
Medicinal bath8 pens · Azamethiphos
Week 50, 2023
Medicinal bath3 pens · Azamethiphos
Week 47, 2023
Other treatment11 pens · Hydrolicer
Week 43, 2023
Other treatment9 pens · Optilicer
Week 42, 2023
Other treatment2 pens · Optilicer
Week 41, 2023
Other treatment7 pens · Ferskvannsbehandling
Week 40, 2023
Other treatment1 pen · FreshWell

Disease

Norwegian Food Safety Authority

17 Sep 2026
Infectious salmon anaemia (ISA): confirmedStatus: active · started 03 Sep 2026 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

19 Jun 2026
1-10 salmon escapedrecaptured 1 · Directorate of Fisheries
05 Jan 2026
1-10 salmon escapedCause: Pigghå · Directorate of Fisheries
03 Jan 2026
1-10 salmon escapedCause: Pigghå · Directorate of Fisheries
12 Dec 2025
1-10 salmon escapedCause: Mistanke om Pigghå · recaptured 1 · Directorate of Fisheries

Show all 11

11 Dec 2025
1-10 salmon escapedrecaptured 1 · Directorate of Fisheries
27 Nov 2025
1-10 salmon escapedrecaptured 1 · Directorate of Fisheries
11 Dec 2021
2 salmon escapedCause: Overføringsslange fra lusetellingskar til merd hadde hoppet ut av merd. · recaptured 1 · Directorate of Fisheries
20 Sep 2020
1 salmon escapedCause: Det ble mistet fisk på sjøen under lustetelling på enhet A03 · recaptured 1 · Directorate of Fisheries
05 Nov 2018
1 salmon escapedCause: Håndtering · recaptured 1 · Directorate of Fisheries
28 Oct 2018
1 salmon escapedCause: Håndtering · recaptured 1 · Directorate of Fisheries
01 Oct 2016
50 salmon escapedCause: Annet · recaptured 1 · Directorate of Fisheries

Wellboat visits

54 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	Ronja Ocean	Marøya	2 h 48 min
22 Aug 2026	Ronja Ocean	Humulen	2 h 37 min
21 Aug 2026	Ronja Naeroeysund	Ternskjæret II	30 h 6 min
10 Aug 2026	Ronja Princess	Smineset N	31 h 8 min
03 Aug 2026	Ronja Explorer	Marøya	1 h 32 min
29 Jul 2026	Ronja Ocean	Marøya	2 h 48 min
29 Jul 2026	Ronja Ocean	Marøya	2 h 18 min
25 Jul 2026	Ronja Naeroeysund	Kvingra	14 h 45 min
25 Jul 2026	Ronja Naeroeysund	Kvingra	5 h 31 min
24 Jul 2026	Ronja Princess	Seiskjæra	8 h 40 min
19 Jul 2026	Ronja Explorer	Marøya	1 h 48 min
19 Jul 2026	Ronja Explorer	Marøya	3 h 2 min

Show 73 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
18 Jul 2026	Ronja Naeroeysund	Gjerdinga	10 h 53 min
17 Jul 2026	Ronja Naeroeysund	Gjerdinga	9 h 43 min
16 Jul 2026	Ronja Naeroeysund	Gjerdinga	9 h 27 min
20 Jun 2026	Ronja Princess	Sandøya III	18 h 41 min
19 Jun 2026	Ronja Princess	Sandøya III	21 h 29 min
18 Jun 2026	Ronja Princess	Sandøya III	7 h 38 min
18 Jun 2026	Ronja Princess	Sandøya III	6 h 42 min
29 May 2026	Ronja Naeroeysund	Humulen	8 h 25 min
29 May 2026	Ronja Naeroeysund	Humulen	1 h 44 min
28 May 2026	Ronja Naeroeysund	Humulen	18 h 38 min
27 May 2026	Ronja Naeroeysund	Humulen	9 h 57 min
10 May 2026	Ronja Explorer	Marøya	1 h 34 min
10 May 2026	Ro Arctic	Skauholmen	31 h 50 min
09 May 2026	Ro Arctic	Skauholmen	9 h 18 min
08 May 2026	Ro Arctic	Skauholmen	8 h 17 min
26 Apr 2026	Ronja Naeroeysund	Helligholmen	9 h 1 min
24 Apr 2026	Ronja Naeroeysund	Helligholmen	20 h 53 min
19 Apr 2026	Ronja Naeroeysund	Ternskjæret II	8 h 38 min
17 Apr 2026	Ronja Naeroeysund	Ternskjæret II	28 h 59 min
16 Apr 2026	Ronja Naeroeysund	Ternskjæret II	6 h 0 min
22 Mar 2026	Ronja Ocean	Ternskjæret II	18 h 37 min
15 Mar 2026	Ronja Naeroeysund	Kipholmen	37 h 12 min
14 Mar 2026	Ronja Naeroeysund	Kipholmen	12 h 54 min
01 Mar 2026	Ro Vision	Purkholmen	10 h 8 min
28 Feb 2026	Ro Vision	Humulen	13 h 21 min
18 Feb 2026	Ronja Naeroeysund	Marøya	21 h 55 min
17 Feb 2026	Ronja Naeroeysund	Marøya	12 h 13 min
31 Jan 2026	Ronja Princess	Kipholmen	20 h 56 min
30 Jan 2026	Ronja Princess	Kipholmen	2 h 0 min
29 Jan 2026	Ronja Princess	Kipholmen	22 h 12 min
28 Jan 2026	Ronja Princess	Kipholmen	12 h 6 min
27 Jan 2026	Ronja Princess	Kipholmen	13 h 28 min
26 Jan 2026	Ronja Princess	Kipholmen	22 h 57 min
25 Jan 2026	Ronja Princess	Kipholmen	1 h 14 min
20 Jan 2026	Ronja Princess	Svanøya	18 h 18 min
19 Jan 2026	Ronja Princess	Svanøya	2 h 4 min
19 Jan 2026	Ronja Princess	Svanøya	10 h 16 min
18 Jan 2026	Ronja Princess	Svanøya	11 h 27 min
17 Jan 2026	Ronja Princess	Svanøya	20 h 58 min
16 Jan 2026	Ronja Princess	Svanøya	2 h 55 min
16 Jan 2026	Ronja Princess	Svanøya	5 h 29 min
15 Jan 2026	Ronja Princess	Svanøya	19 h 58 min
16 Dec 2025	Ro Fortune	Djuptaren	14 h 17 min
15 Dec 2025	Ro Fortune	Djuptaren	8 h 52 min
14 Dec 2025	Ro Fortune	Djuptaren	2 h 8 min
11 Dec 2025	Ro Fortune	Djuptaren	27 h 54 min
07 Dec 2025	Aasvaerfjord	Klubben	7 h 56 min
06 Dec 2025	Aasvaerfjord	Klubben	12 h 50 min
16 Jun 2025	Ronja Vita	no other farm	6 h 55 min
14 Jun 2025	Ronja Vita	no other farm	6 h 26 min
13 Dec 2024	Ronja Ocean	Marøya	1 h 33 min
12 Dec 2024	Ronja Ocean	Stasøya	2 h 34 min
11 Dec 2024	Ronja Ocean	Marøya	1 h 42 min
10 Dec 2024	Ronja Ocean	Marøya	2 h 16 min
04 Dec 2024	Ronja Explorer	Marøya	1 h 52 min
01 Dec 2024	Ronja Explorer	Marøya	3 h 5 min
02 Nov 2024	Ronja Explorer	Hindholmen	3 h 9 min
24 Oct 2024	Ronja Explorer	Marøya	3 h 54 min
23 Oct 2024	Ro Vision	Nordskag	1 h 20 min
20 Oct 2024	Ro Vision	Seterneset disease or zone there	2 h 21 min
16 Oct 2024	Ronja Explorer	Marøya	2 h 16 min
15 Oct 2024	Ronja Explorer	Marøya	2 h 0 min
04 Oct 2024	Ronja Explorer	Marøya	1 h 39 min
04 Oct 2024	Ronja Explorer	Marøya	2 h 37 min
01 Sep 2024	Ro Senja	Finnvik	6 h 50 min
30 Aug 2024	Ro Senja	Finnvik	46 h 22 min
28 Aug 2024	Ro Senja	Finnvik	37 h 39 min
21 Jul 2024	Ronja Ocean	Barøya	67 h 13 min
20 Jul 2024	Ronja Ocean	Barøya	16 h 15 min
20 May 2024	Ronja Naeroeysund	Heggvika	38 h 26 min
24 Apr 2024	Ronja Ocean	Marøya	28 h 28 min
26 Feb 2024	Ro Senja	Kattholmen II	41 h 30 min
21 Feb 2024	Ro Senja	Kattholmen II	8 h 56 min

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

Licences

Site MAB: 7,800 tonnes

Licence	Type	Capacity	Holder
NT N 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,974 t	Salmar Oppdrett AS
NT N 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT N 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	863 t	Salmar Oppdrett AS

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