Hjartholm

Site 13643 · Gulen municipality · Production area 4, Nordhordland til Stadt

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

0.19Adult 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 39 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

8Lice treatments in 2026Latest: Mechanical delousing, week 31, 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

16Wellboat visits in 2026by 5 different vessels · latest 18 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

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Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.03	0.5	Below the limit
2	0.06	0.5	Below the limit
3	0.07	0.5	Below the limit
4	0.10	0.5	Below the limit
5	0.12	0.5	Below the limit
6	0.12	0.5	Below the limit
7	0.11	0.5	Below the limit
8	0.30	0.5	Below the limit
9	0.19	0.5	Below the limit
10	0.28	0.5	Below the limit
11	0.29	0.5	Below the limit
12	0.29	0.5	Below the limit
13	0.37	0.5	Below the limit
14	0.29	0.5	Below the limit
15	0.38	0.5	Below the limit
16	0.12	0.2	Below the limit
17	0.04	0.2	Below the limit
18	0.06	0.2	Below the limit
19	0.09	0.2	Below the limit
20	0.06	0.2	Below the limit
21	0.09	0.2	Below the limit
22	0.10	0.5	Below the limit
23	0.24	0.5	Below the limit
24	0.41	0.5	Near the limit
25	0.09	0.5	Below the limit
26	0.14	0.5	Below the limit
27	0.09	0.5	Below the limit
28	0.17	0.5	Below the limit
29	0.34	0.5	Below the limit
30	0.34	0.5	Below the limit
31	0.05	0.5	Below the limit
32	0.11	0.5	Below the limit
33	0.10	0.5	Below the limit
34	0.12	0.5	Below the limit
35	0.18	0.5	Below the limit
36	0.36	0.5	Below the limit
37	0.26	0.5	Below the limit
38	0.33	0.5	Below the limit
39	0.19	0.5	Below the limit

Earlier years

20250 of 25 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	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	0.00	0.5	Below the limit
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	0.02	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.03	0.5	Below the limit
36	0.03	0.5	Below the limit
37	0.13	0.5	Below the limit
38	0.22	0.5	Below the limit
39	0.18	0.5	Below the limit
40	0.24	0.5	Below the limit
41	0.16	0.5	Below the limit
42	0.07	0.5	Below the limit
43	0.17	0.5	Below the limit
44	0.27	0.5	Below the limit
45	0.40	0.5	Near the limit
46	0.47	0.5	Near the limit
47	0.33	0.5	Below the limit
48	0.11	0.5	Below the limit
49	0.27	0.5	Below the limit
50	0.22	0.5	Below the limit
51	0.49	0.5	Near the limit
52	0.40	0.5	Near the limit

20240 of 45 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	0.27	0.5	Below the limit
2	0.27	0.5	Below the limit
3	0.25	0.5	Below the limit
4	0.02	0.5	Below the limit
5	0.01	0.5	Below the limit
6	0.01	0.5	Below the limit
7	0.03	0.5	Below the limit
8	0.02	0.5	Below the limit
9	0.02	0.5	Below the limit
10	0.04	0.5	Below the limit
11	0.03	0.5	Below the limit
12	0.02	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	0.10	0.2	Below the limit
17	0.03	0.2	Below the limit
18	0.09	0.2	Below the limit
19	0.09	0.2	Below the limit
20	0.18	0.2	Near the limit
21	0.02	0.2	Below the limit
22	0.02	0.5	Below the limit
23	0.00	0.5	Below the limit
24	0.07	0.5	Below the limit
25	0.22	0.5	Below the limit
26	0.16	0.5	Below the limit
27	0.28	0.5	Below the limit
28	0.08	0.5	Below the limit
29	0.07	0.5	Below the limit
30	0.11	0.5	Below the limit
31	0.18	0.5	Below the limit
32	0.23	0.5	Below the limit
33	0.10	0.5	Below the limit
34	0.15	0.5	Below the limit
35	0.20	0.5	Below the limit
36	0.44	0.5	Near the limit
37	0.45	0.5	Near the limit
38	0.18	0.5	Below the limit
39	0.25	0.5	Below the limit
40	0.22	0.5	Below the limit
41	0.33	0.5	Below the limit
42	0.21	0.5	Below the limit
43	0.11	0.5	Below the limit
44	0.35	0.5	Below the limit
45	0.43	0.5	Near the limit
46	unknown	0.5	Reported without a count
47	unknown	0.5	Reported without a count
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

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

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Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.37	0.5	Below the limit
41	0.36	0.5	Below the limit
42	0.00	0.5	Below the limit
43	0.04	0.5	Below the limit
44	0.10	0.5	Below the limit
45	0.19	0.5	Below the limit
46	0.19	0.5	Below the limit
47	0.41	0.5	Near the limit
48	0.41	0.5	Near the limit
49	0.08	0.5	Below the limit
50	0.12	0.5	Below the limit
51	0.14	0.5	Below the limit
52	0.11	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 31, 2026
Mechanical delousing2 pens
Week 30, 2026
Mechanical delousing5 pens
Week 25, 2026
Mechanical delousing3 pens
Week 24, 2026
Mechanical delousing4 pens

Show all 29

Week 17, 2026
Thermal delousing2 pens
Week 16, 2026
Thermal delousing4 pens
Week 1, 2026
Mechanical delousing, Thermal delousing2 pens
Week 52, 2025
Thermal delousing, Mechanical delousing4 pens
Week 48, 2025
Thermal delousing3 pens
Week 47, 2025
Thermal delousing3 pens
Week 41, 2025
Thermal delousingWhole site
Week 35, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 34, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 42, 2024
Mechanical delousingWhole site
Week 38, 2024
Mechanical delousing3 pens
Week 37, 2024
Mechanical delousing1 pen
Week 36, 2024
Mechanical delousing2 pens
Week 33, 2024
Mechanical delousing3 pens
Week 32, 2024
Mechanical delousing3 pens
Week 28, 2024
Mechanical delousingWhole site
Week 21, 2024
Thermal delousing3 pens
Week 20, 2024
Thermal delousing3 pens
Week 4, 2024
Mechanical delousing2 pens
Week 3, 2024
Mechanical delousing3 pens
Week 49, 2023
Mechanical delousing3 pens
Week 48, 2023
Mechanical delousing3 pens
Week 42, 2023
Mechanical delousing3 pens
Week 41, 2023
Mechanical delousing3 pens
Week 40, 2023
Medicinal feedWhole site · Diflubenzuron

Disease

Norwegian Food Safety Authority

10 May 2025
Pancreas disease (PD): closedSubtype SAV3 · started 23 May 2024 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

16 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
18 Aug 2026	Ro Fjord	Brudevika	3 h 13 min
08 Aug 2026	Freyja	Eggesbønes	6 h 49 min
05 Aug 2026	Ro Fjord	Eggesbønes	1 h 36 min
25 Jul 2026	Ronja Mistral	Fureneset	25 h 9 min
18 Jul 2026	Ro Fjord	Voldnes	5 h 7 min
27 Jun 2026	Ro Fjord	Eggesbønes	3 h 53 min
06 Jun 2026	Ro Fjord	Rogne	7 h 13 min
28 May 2026	Ronja Merdoe	no other farm	6 h 32 min
27 May 2026	Ronja Merdoe	no other farm	1 h 0 min
20 Apr 2026	Froy Jarl	Eggesbønes	50 h 42 min
17 Apr 2026	Froy Jarl	Eggesbønes	57 h 55 min
16 Apr 2026	Froy Jarl	Eggesbønes	6 h 5 min

Show 58 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
29 Dec 2025	Freyja	Tårnvika	6 h 42 min
29 Dec 2025	Ronja Mistral	Brunsvik	12 h 4 min
29 Dec 2025	Ronja Mistral	Brunsvik	3 h 7 min
29 Dec 2025	Freyja	Tårnvika	10 h 52 min
28 Dec 2025	Ronja Mistral	Brunsvik	1 h 35 min
28 Dec 2025	Freyja	Tårnvika	10 h 8 min
27 Dec 2025	Ronja Mistral	Brunsvik	7 h 26 min
27 Dec 2025	Ronja Mistral	Brunsvik	3 h 16 min
27 Dec 2025	Freyja	Tårnvika	20 h 48 min
26 Dec 2025	Freyja	Tårnvika	5 h 29 min
26 Dec 2025	Ronja Mistral	Brunsvik	1 h 59 min
26 Dec 2025	Freyja	Tårnvika	3 h 19 min
25 Nov 2025	Ro West	Beitveit	7 h 0 min
25 Nov 2025	Ro West	Beitveit	7 h 50 min
24 Nov 2025	Ro West	Beitveit	11 h 17 min
23 Nov 2025	Ro West	Beitveit	6 h 13 min
22 Nov 2025	Ro West	Beitveit	17 h 7 min
21 Nov 2025	Ro West	Beitveit	10 h 39 min
20 Nov 2025	Ro West	Beitveit	8 h 55 min
11 Oct 2025	Ro West	Eggesbønes	11 h 50 min
06 Jul 2025	Ronja Evolution	Brudevika	3 h 38 min
04 Jul 2025	Ronja Evolution	Rundklumpen	3 h 38 min
02 Jul 2025	Ronja Evolution	Rundklumpen	4 h 16 min
24 Nov 2024	Ro Fjord	Eggesbønes	2 h 12 min
23 Nov 2024	Ro Fjord	Eggesbønes	4 h 17 min
14 Nov 2024	Ronja Skilsoy	Eggesbønes	2 h 17 min
13 Nov 2024	Ronja Skilsoy	Eggesbønes	8 h 3 min
07 Nov 2024	Ro Fjord	Eggesbønes	1 h 32 min
06 Nov 2024	Ro Fjord	Eggesbønes	1 h 51 min
26 Oct 2024	Ronja Skilsoy	Eggesbønes	4 h 22 min
13 Oct 2024	Ro Fjord	Instefjord	1 h 55 min
12 Oct 2024	Ro Fjord	Eggesbønes	2 h 28 min
11 Oct 2024	Ro Fjord	Eggesbønes	2 h 12 min
09 Oct 2024	Ro Fjord	Eggesbønes	3 h 14 min
21 Sep 2024	Ro Fjord	Eggesbønes	7 h 56 min
16 Sep 2024	Tauranga	Løypingneset	8 h 9 min
01 Sep 2024	Ro Fjord	Porsvika	2 h 5 min
29 Aug 2024	Ro Fjord	Eggesbønes	9 h 0 min
08 Jul 2024	Ro Fjord	Nesevågen	10 h 46 min
03 Jul 2024	Ro Fjord	Eggesbønes	12 h 2 min
01 Jul 2024	Ro Fjord	Nesevågen	6 h 6 min
22 May 2024	Ro West	Syltøy	28 h 55 min
21 May 2024	Ro West	Syltøy	12 h 57 min
20 May 2024	Ro West	Syltøy	2 h 59 min
20 May 2024	Ro West	Syltøy	1 h 31 min
19 May 2024	Ro West	Syltøy	13 h 50 min
18 May 2024	Ro West	Syltøy	12 h 50 min
17 May 2024	Ro West	Syltøy	2 h 23 min
16 May 2024	Ro West	Syltøy	12 h 25 min
15 May 2024	Ro West	Syltøy	2 h 23 min
15 May 2024	Ro West	Syltøy	14 h 23 min
14 May 2024	Ro West	Syltøy	15 h 35 min
23 Jan 2024	Hordagut	Gardskråneset	16 h 33 min
22 Jan 2024	Hordagut	Gardskråneset	4 h 41 min
21 Jan 2024	Hordagut	Gardskråneset	30 h 52 min
20 Jan 2024	Hordagut	Gardskråneset	9 h 47 min
19 Jan 2024	Hordagut	Gardskråneset	21 h 6 min
18 Jan 2024	Hordagut	Gardskråneset	11 h 22 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
SF G 0008	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Mowi Seawater Norway AS
SF G 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Mowi Seawater Norway AS
SF G 0015	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Mowi Seawater Norway AS
SF G 0035	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Mowi Seawater Norway AS
SF SU 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Mowi Seawater Norway AS

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