Persflua

Site 33417 · Ørland municipality · Production area 6, Nordmøre og Sør-Trøndelag

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

0.02Adult 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 9 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

2Lice treatments in 2026Latest: Medicinal feed, week 37, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone active · 1 earlierRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

2Wellboat visits in 2026by 1 vessel · latest 31 Jul 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 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

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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	0.2	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	unknown	0.5	Not reported
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	0.06	0.5	Below the limit
38	0.02	0.5	Below the limit
39	0.02	0.5	Below the limit

Earlier years

20252 of 36 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	0.10	0.5	Below the limit
9	0.20	0.5	Below the limit
10	0.00	0.5	Below the limit
11	0.08	0.5	Below the limit
12	0.17	0.5	Below the limit
13	0.13	0.5	Below the limit
14	0.38	0.5	Below the limit
15	0.35	0.5	Below the limit
16	0.10	0.2	Below the limit
17	0.12	0.2	Below the limit
18	0.08	0.2	Below the limit
19	0.10	0.2	Below the limit
20	0.02	0.2	Below the limit
21	0.05	0.2	Below the limit
22	0.05	0.5	Below the limit
23	0.05	0.5	Below the limit
24	0.12	0.5	Below the limit
25	0.15	0.5	Below the limit
26	0.22	0.5	Below the limit
27	0.05	0.5	Below the limit
28	0.07	0.5	Below the limit
29	0.07	0.5	Below the limit
30	0.12	0.5	Below the limit
31	0.08	0.5	Below the limit
32	0.40	0.5	Near the limit
33	0.30	0.5	Below the limit
34	0.65	0.5	Above the limit
35	0.16	0.5	Below the limit
36	0.14	0.5	Below the limit
37	0.38	0.5	Below the limit
38	0.10	0.5	Below the limit
39	0.48	0.5	Near the limit
40	0.70	0.5	Above the limit
41	0.05	0.5	Below the limit
42	0.17	0.5	Below the limit
43	0.33	0.5	Below the limit
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

Treatments

Norwegian Food Safety Authority

Week 37, 2026
Medicinal feedWhole site · Emamectin benzoat
Week 36, 2026
Medicinal feedWhole site · Emamectin benzoat
Week 41, 2025
Mechanical delousing2 pens
Week 40, 2025
Mechanical delousing1 pen

Show all 12

Week 38, 2025
Mechanical delousingWhole site
Week 35, 2025
Thermal delousing3 pens
Week 31, 2025
Mechanical delousingWhole site
Week 27, 2025
Mechanical delousingWhole site
Week 20, 2025
Mechanical delousing3 pens
Week 16, 2025
Mechanical delousing2 pens
Week 15, 2025
Thermal delousing1 pen
Week 11, 2025
Thermal delousing1 pen

Disease

Norwegian Food Safety Authority

23 Apr 2026
Pancreas disease (PD): closedSubtype SAV2 · started 11 Jun 2025 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

2 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
31 Jul 2026	Ronja Evolution	no other farm	4 h 40 min
30 Jul 2026	Ronja Evolution	no other farm	3 h 7 min
29 Aug 2025	Froy Jarl	Munkskjæra	9 h 57 min
27 Aug 2025	Froy Jarl	Munkskjæra	35 h 49 min
26 Aug 2025	Froy Jarl	Munkskjæra	14 h 3 min
07 Apr 2025	Ro Fjell	Lønngrunnen	2 h 15 min
07 Apr 2025	Ro Fjell	Lønngrunnen	2 h 40 min
12 Mar 2025	Freyja	Lønngrunnen	6 h 55 min
18 Feb 2025	Freyja	Lønngrunnen	5 h 1 min
17 Feb 2025	Freyja	Lønngrunnen	2 h 58 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 B 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST B 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST B 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST B 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0021	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0024	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0029	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0032	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS

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