Slokkholmen Ø

Site 12712 · Leka municipality · Production area 7, Nord-Trøndelag med Bindal

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

0.14Adult 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 countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

5Lice 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

9Wellboat visits in 2026by 2 different vessels · latest 29 Aug 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

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	0.00	0.2	Below the limit
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	0.00	0.5	Below the limit
27	0.00	0.5	Below the limit
28	0.02	0.5	Below the limit
29	0.08	0.5	Below the limit
30	0.01	0.5	Below the limit
31	0.00	0.5	Below the limit
32	0.06	0.5	Below the limit
33	0.03	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.23	0.5	Below the limit
36	0.01	0.5	Below the limit
37	unknown	0.5	Not reported
38	0.13	0.5	Below the limit
39	0.14	0.5	Below the limit

Earlier years

20251 of 26 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	0.46	0.5	Near the limit
2	0.38	0.5	Below the limit
3	0.29	0.5	Below the limit
4	0.33	0.5	Below the limit
5	0.47	0.5	Near the limit
6	0.45	0.5	Near the limit
7	0.29	0.5	Below the limit
8	0.48	0.5	Near the limit
9	0.13	0.5	Below the limit
10	0.15	0.5	Below the limit
11	0.16	0.5	Below the limit
12	0.17	0.5	Below the limit
13	0.22	0.5	Below the limit
14	0.35	0.5	Below the limit
15	0.45	0.5	Near the limit
16	0.04	0.2	Below the limit
17	0.05	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.17	0.2	Near the limit
20	0.15	0.2	Below the limit
21	0.17	0.2	Near the limit
22	0.30	0.5	Below the limit
23	1.68	0.5	Above the limit
24	0.35	0.5	Below the limit
25	0.38	0.5	Below the limit
26	0.43	0.5	Near the limit
27	unknown	0.5	Reported without a count
28	unknown	0.5	Reported without a count
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	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	unknown	0.5	Not reported
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20241 of 29 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	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	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	0.01	0.5	Below the limit
29	0.00	0.5	Below the limit
30	0.07	0.5	Below the limit
31	0.06	0.5	Below the limit
32	0.16	0.5	Below the limit
33	0.09	0.5	Below the limit
34	0.03	0.5	Below the limit
35	0.02	0.5	Below the limit
36	0.26	0.5	Below the limit
37	0.43	0.5	Near the limit
38	0.28	0.5	Below the limit
39	0.31	0.5	Below the limit
40	0.48	0.5	Near the limit
41	0.25	0.5	Below the limit
42	0.34	0.5	Below the limit
43	0.43	0.5	Near the limit
44	0.70	0.5	Above the limit
45	unknown	0.5	Reported without a count
46	0.36	0.5	Below the limit
47	0.37	0.5	Below the limit
48	0.42	0.5	Near the limit
49	0.37	0.5	Below the limit
50	0.20	0.5	Below the limit
51	0.42	0.5	Near the limit
52	0.48	0.5	Near the limit

Treatments

Norwegian Food Safety Authority

Week 38, 2026
Mechanical delousingWhole site
Week 35, 2026
Thermal delousing7 pens
Week 29, 2026
Thermal delousingWhole site
Week 28, 2026
Medicinal feedEmamectin benzoat

Show all 19

Week 24, 2025
Mechanical delousingWhole site
Week 16, 2025
Mechanical delousingWhole site
Week 7, 2025
Thermal delousing1 pen
Week 6, 2025
Thermal delousing1 pen
Week 50, 2024
Thermal delousing3 pens
Week 49, 2024
Thermal delousing2 pens
Week 47, 2024
Mechanical delousing4 pens
Week 46, 2024
Mechanical delousing1 pen
Week 45, 2024
Mechanical delousing1 pen
Week 41, 2024
Thermal delousing3 pens
Week 40, 2024
Thermal delousing3 pens
Week 38, 2024
Thermal delousingWhole site
Week 33, 2024
Thermal delousing4 pens
Week 28, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 27, 2024
Medicinal feedWhole site · Emamectin benzoat

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

No escapes reported from this site since 2006.

Wellboat visits

9 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
29 Aug 2026	Ro North	Hestøy	10 h 57 min
28 Aug 2026	Ro North	Hestøy	19 h 2 min
27 Aug 2026	Ro North	Hestøy	7 h 18 min
19 Jul 2026	Ro North	Steinflesa	17 h 47 min
18 Jul 2026	Ro North	Steinflesa	13 h 29 min
04 Jun 2026	Ronja Havsoy	Bjørgan	5 h 39 min
02 Jun 2026	Ronja Havsoy	Bjørgan	1 h 46 min
01 Jun 2026	Ronja Havsoy	Bjørgan	1 h 29 min
28 Apr 2026	Ronja Havsoy	Breivika	4 h 56 min
15 Jun 2025	Ronja Heroy	Bjørgan	11 h 39 min
15 Apr 2025	Ronja Heroy	Sandskjæret	10 h 36 min
14 Apr 2025	Ronja Heroy	Sandskjæret	2 h 0 min

Show 19 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
11 Feb 2025	Ro North	Storvikbukta	19 h 0 min
10 Feb 2025	Ro North	Storvikbukta	16 h 10 min
09 Feb 2025	Ro North	Storvikbukta	1 h 9 min
07 Feb 2025	Ro North	Storvikbukta	7 h 39 min
03 Jan 2025	Ronja Naeroeysund	Steinflesa	7 h 4 min
12 Dec 2024	Ro North	Hestøy	11 h 1 min
11 Dec 2024	Ro North	Hestøy	1 h 53 min
08 Dec 2024	Ro North	Hestøy	22 h 38 min
21 Nov 2024	Ronja Heroy	Nedre Kvarv	49 h 2 min
12 Nov 2024	Ronja Heroy	Storvika V	1 h 3 min
11 Nov 2024	Ronja Heroy	Storvika V	7 h 18 min
10 Nov 2024	Ronja Heroy	Storvika V	5 h 52 min
07 Oct 2024	Ro North	Jakobsteinsvika	15 h 24 min
22 Sep 2024	Ro North	Hestøy	17 h 31 min
21 Sep 2024	Ro North	Hestøy	6 h 42 min
16 Aug 2024	Ro North	Jakobsteinsvika	10 h 51 min
16 Aug 2024	Ro North	Jakobsteinsvika	2 h 34 min
06 Jun 2024	Ro Master	Eiterfjorden	3 h 33 min
02 Jun 2024	Ro Master	Eiterfjorden	2 h 23 min

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

Licences

Site MAB: 5,460 tonnes

Licence	Type	Capacity	Holder
NT LA 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT LA 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT LA 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0040	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS

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