Ratvika

Site 31958 · Åfjord municipality · Production area 6, Nordmøre og Sør-Trøndelag

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

0.09Adult 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 19 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

2Lice 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

6Wellboat visits in 2026by 3 different vessels · latest 19 Jun 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reportedNumber unknown, January 2025Since 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	0.22	0.5	Below the limit
2	0.20	0.5	Below the limit
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	0.00	0.5	Below the limit
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	0.08	0.5	Below the limit
32	0.09	0.5	Below the limit
33	0.09	0.5	Below the limit
34	0.04	0.5	Below the limit
35	0.10	0.5	Below the limit
36	0.16	0.5	Below the limit
37	0.26	0.5	Below the limit
38	0.07	0.5	Below the limit
39	0.09	0.5	Below the limit

Earlier years

20253 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	0.02	0.5	Below the limit
2	0.09	0.5	Below the limit
3	0.04	0.5	Below the limit
4	0.05	0.5	Below the limit
5	0.04	0.5	Below the limit
6	0.21	0.5	Below the limit
7	0.03	0.5	Below the limit
8	0.16	0.5	Below the limit
9	0.05	0.5	Below the limit
10	0.13	0.5	Below the limit
11	0.16	0.5	Below the limit
12	0.29	0.5	Below the limit
13	0.18	0.5	Below the limit
14	0.31	0.5	Below the limit
15	0.21	0.5	Below the limit
16	0.01	0.2	Below the limit
17	0.03	0.2	Below the limit
18	0.06	0.2	Below the limit
19	0.01	0.2	Below the limit
20	0.06	0.2	Below the limit
21	0.03	0.2	Below the limit
22	0.21	0.5	Below the limit
23	0.16	0.5	Below the limit
24	0.30	0.5	Below the limit
25	0.46	0.5	Near the limit
26	0.08	0.5	Below the limit
27	0.09	0.5	Below the limit
28	0.28	0.5	Below the limit
29	0.04	0.5	Below the limit
30	0.43	0.5	Near the limit
31	0.85	0.5	Above the limit
32	0.24	0.5	Below the limit
33	0.44	0.5	Near the limit
34	0.07	0.5	Below the limit
35	0.21	0.5	Below the limit
36	0.24	0.5	Below the limit
37	0.43	0.5	Near the limit
38	0.29	0.5	Below the limit
39	0.73	0.5	Above the limit
40	0.29	0.5	Below the limit
41	0.54	0.5	Above the limit
42	0.31	0.5	Below the limit
43	0.30	0.5	Below the limit
44	0.32	0.5	Below the limit
45	0.24	0.5	Below the limit
46	0.30	0.5	Below the limit
47	0.35	0.5	Below the limit
48	0.10	0.5	Below the limit
49	0.30	0.5	Below the limit
50	0.17	0.5	Below the limit
51	0.12	0.5	Below the limit
52	0.17	0.5	Below the limit

20240 of 23 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	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	unknown	0.5	Not reported
25	unknown	0.5	Not reported
26	unknown	0.5	Not reported
27	unknown	0.5	Not reported
28	unknown	0.5	Not reported
29	unknown	0.5	Not reported
30	0.00	0.5	Below the limit
31	0.00	0.5	Below the limit
32	0.00	0.5	Below the limit
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	0.00	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.00	0.5	Below the limit
40	0.00	0.5	Below the limit
41	0.00	0.5	Below the limit
42	0.03	0.5	Below the limit
43	0.01	0.5	Below the limit
44	0.04	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.01	0.5	Below the limit
47	0.05	0.5	Below the limit
48	0.04	0.5	Below the limit
49	0.05	0.5	Below the limit
50	0.08	0.5	Below the limit
51	0.01	0.5	Below the limit
52	0.05	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 38, 2026
Mechanical delousing3 pens
Week 37, 2026
Mechanical delousing1 pen
Week 45, 2025
Mechanical delousing3 pens
Week 42, 2025
Mechanical delousing2 pens

Show all 16

Week 41, 2025
Mechanical delousing1 pen
Week 40, 2025
Mechanical delousing3 pens
Week 39, 2025
Mechanical delousing1 pen
Week 38, 2025
Mechanical delousing2 pens
Week 37, 2025
Mechanical delousing2 pens
Week 36, 2025
Mechanical delousing4 pens
Week 34, 2025
Mechanical delousing4 pens
Week 32, 2025
Mechanical delousing2 pens
Week 31, 2025
Mechanical delousing2 pens
Week 29, 2025
Mechanical delousing4 pens
Week 26, 2025
Other treatment, Mechanical delousing5 pens · FreshWell
Week 16, 2025
Mechanical delousing4 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

18 Jan 2025
Escape of salmon, number unknownCause: Etter uvær · Directorate of Fisheries

Wellboat visits

6 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
19 Jun 2026	Ronja Vita	Langneset	1 h 53 min
30 May 2026	Ronja Vita	Mortensnes	3 h 49 min
29 May 2026	Ronja Vita	Mortensnes	6 h 5 min
13 Jan 2026	Froy Odin	Nordskag	3 h 10 min
03 Jan 2026	Ronja Spirit	Nordskag	5 h 23 min
02 Jan 2026	Froy Odin	Nordskag	3 h 0 min
23 Nov 2025	Aasvaerfjord	Nordskag	4 h 48 min
26 Jun 2025	Aasvaerfjord	Nordskag	6 h 51 min
24 Jun 2025	Aasvaerfjord	Nordskag	35 h 38 min
23 Jun 2025	Ronja Princess	Nordskag	11 h 38 min
20 Apr 2025	Ro Senja	Kvitholmen disease or zone there	2 h 27 min
19 Apr 2025	Ro Senja	Kvitholmen disease or zone there	22 h 39 min

Show 3 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
15 Sep 2024	Ronja Aurora	Kvingra	2 h 16 min
03 Aug 2024	Ronja Vita	Hallarøy V	3 h 34 min
27 Jul 2024	Ronja Vita	Tristeinen	1 h 11 min

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

Licences

Site MAB: 3,120 tonnes

Licence	Type	Capacity	Holder
ST AA 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS
ST AA 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS
ST AA 0026	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS
ST F 0061	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS
ST R 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS
ST R 0021	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS

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