Tristeinen

Site 30560 · Ørland municipality · Production area 6, Nordmøre og Sør-Trøndelag

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

Broodstock site: the limit may differ from the general one.

0.16Adult 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 21 weeks with a count · broodstock: limit may differCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

0Lice treatments in 2026None recorded2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone recordedRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

3Wellboat visits in 2026by 3 different vessels · latest 12 Aug 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reportedNumber unknown, August 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. Broodstock site: the limit may differ from the general one.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026Broodstock site: the limit may differ from the general one.

Show as table

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	0.2	Not reported
17	unknown	0.2	Not reported
18	unknown	0.2	Not reported
19	0.00	0.2	Below the limit
20	0.00	0.2	Below the limit
21	0.00	0.2	Below the limit
22	0.00	0.5	Below the limit
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	0.10	0.5	Below the limit
27	0.10	0.5	Below the limit
28	0.05	0.5	Below the limit
29	0.03	0.5	Below the limit
30	0.04	0.5	Below the limit
31	0.11	0.5	Below the limit
32	0.15	0.5	Below the limit
33	0.03	0.5	Below the limit
34	0.03	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.04	0.5	Below the limit
37	0.05	0.5	Below the limit
38	0.08	0.5	Below the limit
39	0.16	0.5	Below the limit

Earlier years

20253 of 50 weeks with a count above the limit

Show as table

Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.04	0.5	Below the limit
2	0.03	0.5	Below the limit
3	0.03	0.5	Below the limit
4	0.03	0.5	Below the limit
5	0.01	0.5	Below the limit
6	0.08	0.5	Below the limit
7	0.03	0.5	Below the limit
8	0.08	0.5	Below the limit
9	0.10	0.5	Below the limit
10	0.07	0.5	Below the limit
11	0.13	0.5	Below the limit
12	0.13	0.5	Below the limit
13	0.04	0.5	Below the limit
14	0.12	0.5	Below the limit
15	0.13	0.5	Below the limit
16	0.12	0.2	Below the limit
17	0.08	0.2	Below the limit
18	0.18	0.2	Near the limit
19	0.19	0.2	Near the limit
20	0.14	0.2	Below the limit
21	0.12	0.2	Below the limit
22	0.14	0.5	Below the limit
23	0.24	0.5	Below the limit
24	0.19	0.5	Below the limit
25	0.29	0.5	Below the limit
26	0.13	0.5	Below the limit
27	0.27	0.5	Below the limit
28	0.11	0.5	Below the limit
29	0.16	0.5	Below the limit
30	0.15	0.5	Below the limit
31	0.40	0.5	Near the limit
32	0.24	0.5	Below the limit
33	0.36	0.5	Below the limit
34	0.15	0.5	Below the limit
35	0.19	0.5	Below the limit
36	0.17	0.5	Below the limit
37	0.38	0.5	Below the limit
38	1.01	0.5	Above the limit
39	0.26	0.5	Below the limit
40	0.49	0.5	Near the limit
41	0.20	0.5	Below the limit
42	0.22	0.5	Below the limit
43	0.18	0.5	Below the limit
44	0.38	0.5	Below the limit
45	0.22	0.5	Below the limit
46	0.42	0.5	Near the limit
47	0.85	0.5	Above the limit
48	0.63	0.5	Above the limit
49	0.10	0.5	Below the limit
50	0.10	0.5	Below the limit
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20240 of 41 weeks with a count above the limit

Show as table

Adult female lice per fish per week, 2024
Week	Adult female lice per fish	Lice limit	Status
1	0.20	0.5	Below the limit
2	0.21	0.5	Below the limit
3	0.24	0.5	Below the limit
4	0.19	0.5	Below the limit
5	0.14	0.5	Below the limit
6	0.22	0.5	Below the limit
7	0.19	0.5	Below the limit
8	0.19	0.5	Below the limit
9	0.21	0.5	Below the limit
10	0.27	0.5	Below the limit
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	0.00	0.5	Below the limit
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	0.05	0.5	Below the limit
29	0.00	0.5	Below the limit
30	0.02	0.5	Below the limit
31	0.02	0.5	Below the limit
32	0.02	0.5	Below the limit
33	0.00	0.5	Below the limit
34	0.00	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.02	0.5	Below the limit
37	0.01	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.01	0.5	Below the limit
40	0.01	0.5	Below the limit
41	0.00	0.5	Below the limit
42	0.01	0.5	Below the limit
43	0.03	0.5	Below the limit
44	0.04	0.5	Below the limit
45	0.03	0.5	Below the limit
46	0.05	0.5	Below the limit
47	0.05	0.5	Below the limit
48	0.03	0.5	Below the limit
49	0.03	0.5	Below the limit
50	0.06	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.03	0.5	Below the limit

20230 of 13 weeks with a count above the limit (data from week 40)

Show as table

Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.39	0.5	Below the limit
41	0.49	0.5	Near the limit
42	0.45	0.5	Near the limit
43	0.33	0.5	Below the limit
44	0.29	0.5	Below the limit
45	0.35	0.5	Below the limit
46	0.42	0.5	Near the limit
47	0.27	0.5	Below the limit
48	0.37	0.5	Below the limit
49	0.21	0.5	Below the limit
50	0.24	0.5	Below the limit
51	0.27	0.5	Below the limit
52	0.22	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 49, 2025
Medicinal bath1 pen · Azamethiphos
Week 45, 2025
Mechanical delousing2 pens
Week 41, 2025
Mechanical delousing3 pens
Week 39, 2025
Mechanical delousing2 pens

Show all 16

Week 36, 2025
Mechanical delousing5 pens
Week 34, 2025
Mechanical delousing2 pens
Week 33, 2025
Mechanical delousing1 pen
Week 32, 2025
Mechanical delousing4 pens
Week 31, 2025
Mechanical delousing3 pens
Week 29, 2025
Mechanical delousing2 pens
Week 28, 2025
Mechanical delousing6 pens
Week 26, 2025
Mechanical delousing2 pens
Week 47, 2023
Medicinal bath2 pens · Azamethiphos
Week 43, 2023
Other treatment10 pens · Ferskvann/ Hydrolicer, Hydrolicer
Week 42, 2023
Other treatment2 pens · Busch vakumpumpe
Week 41, 2023
Other treatment1 pen · Busch vakumpumpe

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

04 Aug 2025
Escape of salmon, number unknownCause: Uavklart · Directorate of Fisheries

Wellboat visits

3 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 Aug 2026	Ronja Aurora	Klampvika N	5 h 18 min
15 May 2026	Ronja Princess	Bondejorda	1 h 38 min
01 May 2026	Ronja Vita	Lybergsvika	4 h 39 min
21 Dec 2025	Froy Odin	Nordskag	2 h 40 min
04 Dec 2025	Ronja Princess	Svanøya	1 h 53 min
03 Dec 2025	Ronja Princess	Nordskag	26 h 50 min
15 Oct 2025	Ro Vision	Krabbholmen II	1 h 26 min
15 Oct 2025	Aasvaerfjord	Nordskag	2 h 41 min
12 Oct 2025	Ro Vision	Nordskag	9 h 44 min
11 Oct 2025	Aasvaerfjord	Nordskag	4 h 53 min
07 Oct 2025	Aasvaerfjord	Nordskag	3 h 16 min
25 Sep 2025	Ro Vision	Olausskjæret	7 h 20 min

Show 23 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
21 Sep 2025	Ronja Princess	Nordskag	2 h 50 min
07 Sep 2025	Ro Vision	Salatskjæra	5 h 3 min
09 Jul 2025	Aasvaerfjord	Reiråklakken disease or zone there	47 h 46 min
25 Jun 2025	Ronja Princess	Ratvika	1 h 54 min
21 Apr 2025	Ro Senja	Ratvika	12 h 38 min
21 Apr 2025	Ro Senja	Ratvika	9 h 1 min
15 Apr 2025	Neptun	no other farm	1 h 3 min
20 Mar 2025	Neptun	Hallarøy V	1 h 56 min
04 Feb 2025	Neptun	Orholmen	6 h 15 min
28 Sep 2024	Ronja Vita	Harbakholmen	1 h 15 min
23 Sep 2024	Ronja Aurora	Takflua	4 h 5 min
23 Sep 2024	Ronja Aurora	Takflua	39 min
25 Jul 2024	Ronja Vita	Setevika N	4 h 55 min
16 Jul 2024	Ronja Vita	Oterneset	3 h 10 min
19 Mar 2024	Ro Vision	Nordskag	2 h 58 min
14 Mar 2024	Froy Odin	Nordskag	1 h 19 min
13 Mar 2024	Ro Vision	Nordskag	2 h 7 min
10 Mar 2024	Ro Vision	Nordskag	1 h 36 min
09 Mar 2024	Ro Vision	Nordskag	1 h 15 min
09 Mar 2024	Ro Vision	Nordskag	1 h 15 min
08 Mar 2024	Ro Vision	Nordskag	1 h 39 min
24 Feb 2024	Ronja Princess	Nordskag	2 h 27 min
11 Feb 2024	Ronja Princess	Nordskag	4 h 3 min

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

Licences

Site MAB: 4,680 tonnes

Licence	Type	Capacity	Holder
NT F 0034	Kommersiell / stamfiskSalmon	780 t	Salmar Farming AS
NT F 0035	Kommersiell / stamfiskSalmon	780 t	Salmar Farming AS
ST R 0023	Forskning / matfiskSalmon	2,340 t	Sintef Ocean AS
ST R 0024	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Salmar Oppdrett AS

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