Kalvhagan II

Site 34797 · Nærøysund municipality · Production area 7, Nord-Trøndelag med Bindal

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

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

1Lice treatments in 2026Latest: Mechanical delousing, week 23, 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 03 Sep 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	0.00	0.5	Below the limit
2	0.00	0.5	Below the limit
3	0.00	0.5	Below the limit
4	0.00	0.5	Below the limit
5	0.00	0.5	Below the limit
6	0.01	0.5	Below the limit
7	0.01	0.5	Below the limit
8	0.01	0.5	Below the limit
9	0.01	0.5	Below the limit
10	0.01	0.5	Below the limit
11	0.01	0.5	Below the limit
12	0.00	0.5	Below the limit
13	0.01	0.5	Below the limit
14	0.01	0.5	Below the limit
15	0.04	0.5	Below the limit
16	0.04	0.2	Below the limit
17	0.02	0.2	Below the limit
18	0.04	0.2	Below the limit
19	0.06	0.2	Below the limit
20	0.06	0.2	Below the limit
21	0.07	0.2	Below the limit
22	0.08	0.5	Below the limit
23	0.00	0.5	Below the limit
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	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 38 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	0.00	0.5	Below the limit
2	0.00	0.5	Below the limit
3	0.07	0.5	Below the limit
4	0.07	0.5	Below the limit
5	0.04	0.5	Below the limit
6	0.06	0.5	Below the limit
7	0.10	0.5	Below the limit
8	0.08	0.5	Below the limit
9	0.13	0.5	Below the limit
10	0.16	0.5	Below the limit
11	0.17	0.5	Below the limit
12	0.17	0.5	Below the limit
13	0.15	0.5	Below the limit
14	0.15	0.5	Below the limit
15	0.16	0.5	Below the limit
16	0.16	0.2	Below the limit
17	0.01	0.2	Below the limit
18	0.01	0.2	Below the limit
19	0.04	0.2	Below the limit
20	0.08	0.2	Below the limit
21	0.02	0.2	Below the limit
22	0.12	0.5	Below the limit
23	unknown	0.5	Reported without a count
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	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	0.00	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.01	0.5	Below the limit
47	0.00	0.5	Below the limit
48	0.00	0.5	Below the limit
49	0.00	0.5	Below the limit
50	0.00	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.00	0.5	Below the limit

20240 of 38 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	0.03	0.5	Below the limit
2	0.03	0.5	Below the limit
3	0.03	0.5	Below the limit
4	0.06	0.5	Below the limit
5	0.04	0.5	Below the limit
6	0.07	0.5	Below the limit
7	0.08	0.5	Below the limit
8	0.06	0.5	Below the limit
9	0.08	0.5	Below the limit
10	0.09	0.5	Below the limit
11	0.03	0.5	Below the limit
12	0.04	0.5	Below the limit
13	0.02	0.5	Below the limit
14	0.07	0.5	Below the limit
15	0.09	0.5	Below the limit
16	0.10	0.2	Below the limit
17	0.09	0.2	Below the limit
18	0.07	0.2	Below the limit
19	0.04	0.2	Below the limit
20	0.07	0.2	Below the limit
21	0.10	0.2	Below the limit
22	0.06	0.5	Below the limit
23	0.11	0.5	Below the limit
24	unknown	0.5	Reported without a count
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	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	0.01	0.5	Below the limit
44	0.01	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.00	0.5	Below the limit
47	0.00	0.5	Below the limit
48	0.01	0.5	Below the limit
49	0.01	0.5	Below the limit
50	0.01	0.5	Below the limit
51	0.01	0.5	Below the limit
52	0.00	0.5	Below the limit

20230 of 13 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
40	0.06	0.5	Below the limit
41	0.07	0.5	Below the limit
42	0.11	0.5	Below the limit
43	0.11	0.5	Below the limit
44	0.04	0.5	Below the limit
45	0.03	0.5	Below the limit
46	0.06	0.5	Below the limit
47	0.04	0.5	Below the limit
48	0.03	0.5	Below the limit
49	0.03	0.5	Below the limit
50	0.04	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.03	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 23, 2026
Mechanical delousingWhole site
Week 46, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 45, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 23, 2025
Mechanical delousingWhole site

Show all 11

Week 17, 2025
Thermal delousingWhole site
Week 45, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 44, 2024
Medicinal feedWhole site · Emamectin benzoat
Week 24, 2024
Freshwater treatment, Mechanical delousing6 pens
Week 23, 2024
Freshwater treatment2 pens
Week 41, 2023
Medicinal feed7 pens · Emamectin benzoat
Week 40, 2023
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

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
03 Sep 2026	Ronja Havsoy	Sandskjæret	5 h 30 min
02 Sep 2026	Ronja Havsoy	Sandskjæret	3 h 3 min
01 Sep 2026	Ronja Havsoy	Sandskjæret	2 h 33 min
03 Jun 2026	Ronja Heroy	Kjelneset	4 h 15 min
02 Jun 2026	Ronja Heroy	Kjelneset	4 h 49 min
02 Jun 2026	Ronja Heroy	Kjelneset	2 h 22 min
01 Jun 2026	Ronja Heroy	Svartfjell	5 h 2 min
06 Sep 2025	Ronja Havsoy	Storvikbukta	2 h 38 min
06 Sep 2025	Ronja Havsoy	Storvikbukta	1 h 34 min
05 Sep 2025	Ronja Havsoy	Storvikbukta	2 h 7 min
05 Sep 2025	Ronja Havsoy	Storvikbukta	1 h 57 min
26 Apr 2025	Ro North	Hestøy	6 h 54 min

Show 12 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
25 Apr 2025	Ro North	Hestøy	18 h 53 min
24 Apr 2025	Ro North	Hestøy	13 h 48 min
11 Sep 2024	Ronja Havsoy	Storvikbukta	1 h 40 min
11 Sep 2024	Ronja Havsoy	Storvikbukta	1 h 39 min
10 Sep 2024	Ronja Havsoy	Storvikbukta	1 h 32 min
10 Sep 2024	Ronja Havsoy	Storvikbukta	47 min
14 Jun 2024	Ronja Heroy	Kjelneset	2 h 25 min
13 Jun 2024	Ronja Heroy	Kjelneset	4 h 43 min
12 Jun 2024	Ronja Heroy	Kjelneset	5 h 59 min
11 Jun 2024	Ronja Heroy	Kjelneset	6 h 29 min
10 Jun 2024	Ronja Heroy	Kjelneset	6 h 56 min
08 Jun 2024	Ronja Heroy	Skarvhammaren disease or zone there	3 h 47 min

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

Licences

Site MAB: 3,900 tonnes

Licence	Type	Capacity	Holder
NT LA 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT LA 0005	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 0040	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS

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