Blom

Site 12156 · Osterøy municipality · Production area 4, Nordhordland til Stadt

Below the lice limit, week 39Operated by Sjøtroll Havbruk Sjø AS

0.00Adult 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 8 weeks with a countCalculated 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

1Wellboat visits in 2026by 1 vessel · latest 02 Aug 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported1 rainbow trout, July 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	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	unknown	0.5	Not reported
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

Earlier years

20250 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

Show as table

Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.21	0.5	Below the limit
2	0.29	0.5	Below the limit
3	0.31	0.5	Below the limit
4	0.15	0.5	Below the limit
5	0.33	0.5	Below the limit
6	0.38	0.5	Below the limit
7	0.17	0.5	Below the limit
8	0.22	0.5	Below the limit
9	0.18	0.5	Below the limit
10	0.03	0.5	Below the limit
11	0.13	0.5	Below the limit
12	0.20	0.5	Below the limit
13	0.25	0.5	Below the limit
14	0.07	0.5	Below the limit
15	0.05	0.5	Below the limit
16	0.07	0.2	Below the limit
17	0.06	0.2	Below the limit
18	0.05	0.2	Below the limit
19	0.07	0.2	Below the limit
20	0.02	0.2	Below the limit
21	0.03	0.2	Below the limit
22	0.03	0.5	Below the limit
23	0.00	0.5	Below the limit
24	0.02	0.5	Below the limit
25	0.01	0.5	Below the limit
26	0.00	0.5	Below the limit
27	0.01	0.5	Below the limit
28	0.00	0.5	Below the limit
29	0.01	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	0.00	0.5	Below the limit
34	0.01	0.5	Below the limit
35	0.02	0.5	Below the limit
36	0.01	0.5	Below the limit
37	0.01	0.5	Below the limit
38	0.06	0.5	Below the limit
39	0.09	0.5	Below the limit
40	0.08	0.5	Below the limit
41	0.08	0.5	Below the limit
42	0.13	0.5	Below the limit
43	0.21	0.5	Below the limit
44	0.43	0.5	Near the limit
45	0.49	0.5	Near the limit
46	0.20	0.5	Below the limit
47	0.13	0.5	Below the limit
48	0.32	0.5	Below the limit
49	0.24	0.5	Below the limit
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20240 of 17 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	unknown	0.5	Not reported
31	unknown	0.5	Not reported
32	unknown	0.5	Not reported
33	unknown	0.5	Not reported
34	unknown	0.5	Reported without a count
35	unknown	0.5	Reported without a count
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	0.00	0.5	Below the limit
43	0.07	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.01	0.5	Below the limit
46	0.15	0.5	Below the limit
47	0.47	0.5	Near the limit
48	0.48	0.5	Near the limit
49	0.21	0.5	Below the limit
50	0.18	0.5	Below the limit
51	0.17	0.5	Below the limit
52	0.14	0.5	Below the limit

20230 of 10 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

Show as table

Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
10	0.38	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	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	unknown	0.5	Not reported
32	unknown	0.5	Not reported
33	unknown	0.5	Not reported
34	unknown	0.5	Not reported
35	unknown	0.5	Not reported
36	unknown	0.5	Not reported
37	unknown	0.5	Not reported
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported
40	0.07	0.5	Below the limit
41	0.11	0.5	Below the limit
42	0.16	0.5	Below the limit
43	0.12	0.5	Below the limit
44	0.27	0.5	Below the limit
45	0.32	0.5	Below the limit
46	0.33	0.5	Below the limit
47	0.36	0.5	Below the limit
48	0.48	0.5	Near the limit
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 46, 2025
Thermal delousingWhole site
Week 14, 2025
Thermal delousing, Freshwater treatment19 pens
Week 10, 2025
Thermal delousing8 pens
Week 9, 2025
Thermal delousing8 pens

Show all 14

Week 7, 2025
Thermal delousing, Other treatment6 pens · Kombi - Ferskvann og Termisk
Week 6, 2025
Thermal delousing7 pens
Week 4, 2025
Thermal delousing11 pens
Week 3, 2025
Thermal delousing2 pens
Week 52, 2024
Thermal delousing2 pens
Week 50, 2024
Medicinal bath2 pens · Azamethiphos
Week 48, 2024
Medicinal bath9 pens · Azamethiphos
Week 47, 2024
Thermal delousing2 pens
Week 48, 2023
Other treatment1 pen · Optilicer
Week 10, 2023
Other treatment10 pens · Optilicer

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

02 Jul 2025
1 rainbow trout escapedCause: Under lusetelling på merd nr 9 sprellet en fisk av bordet der vi har oppvåkningskar og bedøvelseskar. Deretter falt fisken ned på dekk på båten, og ut "spygatt" på båten. · recaptured 1 · Directorate of Fisheries

Wellboat visits

1 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 Aug 2026	Seifjell	Klubben	1 h 29 min
02 Apr 2025	Seihav	Sagen 2	64 h 50 min
01 Apr 2025	Seihav	Sagen 2	14 h 25 min
31 Mar 2025	Seihav	Sagen 2	14 h 1 min
31 Mar 2025	Seihav	Sagen 2	2 h 52 min
14 Feb 2025	Seihav	Skaftå	1 h 19 min
13 Feb 2025	Seihav	Skaftå	11 h 59 min
13 Feb 2025	Seihav	Skaftå	2 h 27 min
23 Jan 2025	Horda Pioneer	Skreda	1 h 27 min
22 Jan 2025	Horda Pioneer	Skreda	13 h 38 min
22 Jan 2025	Horda Pioneer	Skreda	4 h 41 min
22 Jan 2025	Horda Pioneer	Skreda	8 h 0 min

Show 18 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
21 Jan 2025	Horda Pioneer	Skreda	6 h 56 min
29 Dec 2024	Seihav	Buholmen	2 h 13 min
29 Dec 2024	Seihav	Buholmen	5 h 0 min
28 Dec 2024	Seihav	Buholmen	15 h 1 min
12 Dec 2024	Seihav	Midtflua	3 h 2 min
12 Dec 2024	Seihav	Midtflua	7 h 2 min
28 Nov 2024	Seihav	Hestabyneset	2 h 2 min
27 Nov 2024	Seihav	Hestabyneset	4 h 21 min
27 Nov 2024	Seihav	Hestabyneset	4 h 48 min
27 Nov 2024	Seihav	Hestabyneset	3 h 17 min
26 Nov 2024	Seihav	Hestabyneset	2 h 40 min
26 Nov 2024	Seihav	Hestabyneset	2 h 29 min
26 Nov 2024	Seihav	Hestabyneset	4 h 14 min
25 Nov 2024	Seihav	Hestabyneset	3 h 48 min
24 Nov 2024	Seihav	Hestabyneset	24 h 46 min
11 Oct 2024	Mowi Star	Skaftå	2 h 58 min
14 Sep 2024	Mowi Star	Åkre	1 h 8 min
27 Aug 2024	Mowi Star	no other farm	44 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
H OR 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Sjøtroll Havbruk Sjø AS
H OR 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Sjøtroll Havbruk Sjø AS
H OR 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Sjøtroll Havbruk Sjø AS
H OR 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Sjøtroll Havbruk Sjø AS

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