Drevflesa

Site 36917 · Åfjord municipality · Production area 6, Nordmøre og Sør-Trøndelag

Below the lice limit, week 39Operated by Bjørøya AS · group unknown

0.26Adult female lice per fishLimit 0.50 · below the limitWeek 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

2Weeks above the limit in 2026of 39 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

4Lice treatments in 2026Latest: Mechanical 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

7Wellboat visits in 2026by 2 different vessels · latest 02 Sep 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported6,969 salmon, February 2019Since 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	0.07	0.5	Below the limit
2	0.07	0.5	Below the limit
3	0.08	0.5	Below the limit
4	0.06	0.5	Below the limit
5	0.09	0.5	Below the limit
6	0.13	0.5	Below the limit
7	0.14	0.5	Below the limit
8	0.15	0.5	Below the limit
9	0.18	0.5	Below the limit
10	0.12	0.5	Below the limit
11	0.08	0.5	Below the limit
12	0.07	0.5	Below the limit
13	0.03	0.5	Below the limit
14	0.04	0.5	Below the limit
15	0.05	0.5	Below the limit
16	0.07	0.2	Below the limit
17	0.09	0.2	Below the limit
18	0.14	0.2	Below the limit
19	0.11	0.2	Below the limit
20	0.09	0.2	Below the limit
21	0.16	0.2	Below the limit
22	0.16	0.5	Below the limit
23	0.34	0.5	Below the limit
24	0.36	0.5	Below the limit
25	0.15	0.5	Below the limit
26	0.30	0.5	Below the limit
27	0.16	0.5	Below the limit
28	0.13	0.5	Below the limit
29	0.15	0.5	Below the limit
30	0.13	0.5	Below the limit
31	0.18	0.5	Below the limit
32	0.27	0.5	Below the limit
33	0.06	0.5	Below the limit
34	0.15	0.5	Below the limit
35	0.61	0.5	Above the limit
36	0.43	0.5	Near the limit
37	0.55	0.5	Above the limit
38	0.08	0.5	Below the limit
39	0.26	0.5	Below the limit

Earlier years

20251 of 39 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	0.14	0.5	Below the limit
2	0.04	0.5	Below the limit
3	0.04	0.5	Below the limit
4	0.04	0.5	Below the limit
5	0.10	0.5	Below the limit
6	0.09	0.5	Below the limit
7	0.09	0.5	Below the limit
8	0.11	0.5	Below the limit
9	0.18	0.5	Below the limit
10	0.25	0.5	Below the limit
11	0.24	0.5	Below the limit
12	0.21	0.5	Below the limit
13	0.24	0.5	Below the limit
14	0.31	0.5	Below the limit
15	0.35	0.5	Below the limit
16	0.40	0.2	Above the limit
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	0.00	0.5	Below the limit
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	unknown	0.5	Reported without a count
34	0.03	0.5	Below the limit
35	0.02	0.5	Below the limit
36	0.03	0.5	Below the limit
37	0.06	0.5	Below the limit
38	0.05	0.5	Below the limit
39	0.07	0.5	Below the limit
40	0.05	0.5	Below the limit
41	0.13	0.5	Below the limit
42	0.14	0.5	Below the limit
43	0.14	0.5	Below the limit
44	0.21	0.5	Below the limit
45	0.26	0.5	Below the limit
46	0.26	0.5	Below the limit
47	0.25	0.5	Below the limit
48	0.00	0.5	Below the limit
49	0.00	0.5	Below the limit
50	0.03	0.5	Below the limit
51	0.06	0.5	Below the limit
52	0.05	0.5	Below the limit

20241 of 50 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	0.02	0.5	Below the limit
2	0.03	0.5	Below the limit
3	0.06	0.5	Below the limit
4	0.04	0.5	Below the limit
5	0.04	0.5	Below the limit
6	0.04	0.5	Below the limit
7	0.04	0.5	Below the limit
8	0.08	0.5	Below the limit
9	0.03	0.5	Below the limit
10	0.01	0.5	Below the limit
11	0.07	0.5	Below the limit
12	0.06	0.5	Below the limit
13	0.06	0.5	Below the limit
14	0.02	0.5	Below the limit
15	0.03	0.5	Below the limit
16	0.06	0.2	Below the limit
17	0.04	0.2	Below the limit
18	0.09	0.2	Below the limit
19	0.06	0.2	Below the limit
20	0.14	0.2	Below the limit
21	0.07	0.2	Below the limit
22	0.11	0.5	Below the limit
23	0.09	0.5	Below the limit
24	0.05	0.5	Below the limit
25	unknown	0.5	Not reported
26	0.18	0.5	Below the limit
27	0.26	0.5	Below the limit
28	0.28	0.5	Below the limit
29	0.34	0.5	Below the limit
30	0.21	0.5	Below the limit
31	0.26	0.5	Below the limit
32	0.38	0.5	Below the limit
33	0.40	0.5	Near the limit
34	0.42	0.5	Near the limit
35	0.20	0.5	Below the limit
36	0.45	0.5	Near the limit
37	0.71	0.5	Above the limit
38	0.32	0.5	Below the limit
39	0.39	0.5	Below the limit
40	0.41	0.5	Near the limit
41	0.49	0.5	Near the limit
42	0.30	0.5	Below the limit
43	0.27	0.5	Below the limit
44	0.34	0.5	Below the limit
45	0.39	0.5	Below the limit
46	0.28	0.5	Below the limit
47	0.28	0.5	Below the limit
48	0.44	0.5	Near the limit
49	unknown	0.5	Not reported
50	0.12	0.5	Below the limit
51	0.10	0.5	Below the limit
52	0.09	0.5	Below the limit

20230 of 4 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	unknown	0.5	Not reported
41	unknown	0.5	Not reported
42	unknown	0.5	Not reported
43	unknown	0.5	Not reported
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	0.04	0.5	Below the limit
50	0.09	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.02	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 37, 2026
Mechanical delousing3 pens
Week 32, 2026
Mechanical delousingWhole site
Week 27, 2026
Mechanical delousing5 pens
Week 25, 2026
Mechanical delousing5 pens

Show all 17

Week 47, 2025
Other treatmentWhole site · Ferskvann - Thermolicer
Week 44, 2025
Medicinal feed2 pens · Emamectin benzoate
Week 43, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 42, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 50, 2024
Other treatment1 pen · Hydrolicer
Week 45, 2024
Other treatment1 pen · Hydrolicer
Week 42, 2024
Other treatment5 pens · Hydrolicer
Week 39, 2024
Other treatment1 pen · Hydrolicer
Week 38, 2024
Other treatment6 pens · Hydrolicer
Week 35, 2024
Other treatment5 pens · Hydrolicer
Week 34, 2024
Other treatment3 pens · Hydrolicer
Week 30, 2024
Other treatment4 pens · Hydrolicer
Week 29, 2024
Other treatment4 pens · Hydrolicer

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

03 Feb 2019
6,969 salmon escapedCause: Ukjent · Directorate of Fisheries

Wellboat visits

7 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
02 Sep 2026	Njord Kya	Ulvan	2 h 35 min
01 Sep 2026	Njord Kya	Trøan Bjørklibukta	3 h 10 min
15 Jul 2026	Njord Kya	Hofsøya	1 h 39 min
05 Jul 2026	Njord Kya	Espnestaren	2 h 26 min
01 Jul 2026	Njord Kya	Lamøya	2 h 35 min
26 Jun 2026	Ro Arctic	Ulvan	2 h 3 min
15 Jun 2026	Njord Kya	Djuptaren disease or zone there	67 h 58 min
23 Nov 2025	Ro Fjell	Gjerde	28 h 23 min
22 Nov 2025	Ro Fjell	Gjerde	18 h 10 min
20 Nov 2025	Ro Fjell	Gjerde	43 h 8 min
19 Nov 2025	Ro Fjell	Gjerde	9 h 30 min
25 Aug 2025	Ro Sailor	Pundsvik I	3 h 31 min

Show 5 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
14 Jul 2025	Ro Sailor	Korsvika	48 min
13 Jul 2025	Ro Sailor	Korsvika	38 min
12 Jul 2025	Ro Sailor	Korsvika	1 h 56 min
26 Apr 2025	Njord Kya	Ulvan	1 h 33 min
26 Apr 2025	Njord Kya	Kattholmen	2 h 4 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
M FI 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
NT F 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	796 t	Bjørøya AS
NT F 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	796 t	Bjørøya AS
NT F 0026	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	796 t	Bjørøya AS
ST HE 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
TR AA 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS
TR F 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,000 t	Måsøval Lisens AS
TR O 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS
TR O 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS
TR O 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS

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