Hestholmen Ø

Site 14136 · Kvitsøy municipality · Production area 2, Ryfylke

Below the lice limit, week 39Operated by Grieg Seafood Farming AS · group Grieg Seafood

Broodstock site: the limit may differ from the general one.

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 26 weeks with a count · broodstock: limit may differCalculated 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

6Wellboat visits in 2026by 2 different vessels · latest 11 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. Broodstock site: the limit may differ from the general one.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026Broodstock site: the limit may differ from the general one.

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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	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.01	0.2	Below the limit
21	0.01	0.2	Below the limit
22	0.09	0.5	Below the limit
23	0.09	0.5	Below the limit
24	0.31	0.5	Below the limit
25	0.46	0.5	Near the limit
26	0.40	0.5	Near the limit
27	0.38	0.5	Below the limit
28	0.21	0.5	Below the limit
29	0.22	0.5	Below the limit
30	0.17	0.5	Below the limit
31	0.20	0.5	Below the limit
32	0.24	0.5	Below the limit
33	0.08	0.5	Below the limit
34	0.03	0.5	Below the limit
35	0.02	0.5	Below the limit
36	0.05	0.5	Below the limit
37	0.02	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

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Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.02	0.5	Below the limit
2	0.05	0.5	Below the limit
3	0.05	0.5	Below the limit
4	0.09	0.5	Below the limit
5	0.04	0.5	Below the limit
6	0.06	0.5	Below the limit
7	0.13	0.5	Below the limit
8	0.13	0.5	Below the limit
9	0.19	0.5	Below the limit
10	0.20	0.5	Below the limit
11	0.17	0.5	Below the limit
12	0.25	0.5	Below the limit
13	0.11	0.5	Below the limit
14	0.17	0.5	Below the limit
15	0.11	0.5	Below the limit
16	0.18	0.2	Near the limit
17	0.12	0.2	Below the limit
18	0.10	0.2	Below the limit
19	0.18	0.2	Near the limit
20	0.19	0.2	Near the limit
21	0.18	0.2	Near the limit
22	0.23	0.5	Below the limit
23	0.41	0.5	Near the limit
24	0.46	0.5	Near the limit
25	0.49	0.5	Near the limit
26	0.44	0.5	Near the limit
27	0.43	0.5	Near the limit
28	0.46	0.5	Near the limit
29	0.44	0.5	Near the limit
30	0.41	0.5	Near the limit
31	0.22	0.5	Below the limit
32	0.31	0.5	Below the limit
33	0.35	0.5	Below the limit
34	0.46	0.5	Near the limit
35	0.36	0.5	Below the limit
36	0.31	0.5	Below the limit
37	0.23	0.5	Below the limit
38	0.38	0.5	Below the limit
39	0.33	0.5	Below the limit
40	unknown	0.5	Reported without a count
41	0.31	0.5	Below the limit
42	0.34	0.5	Below the limit
43	0.18	0.5	Below the limit
44	0.18	0.5	Below the limit
45	0.14	0.5	Below the limit
46	0.06	0.5	Below the limit
47	0.10	0.5	Below the limit
48	0.25	0.5	Below the limit
49	0.10	0.5	Below the limit
50	0.10	0.5	Below the limit
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20243 of 33 weeks with a count above the limit

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Adult female lice per fish per week, 2024
Week	Adult female lice per fish	Lice limit	Status
1	0.10	0.5	Below the limit
2	0.04	0.5	Below the limit
3	0.14	0.5	Below the limit
4	0.04	0.5	Below the limit
5	0.13	0.5	Below the limit
6	0.08	0.5	Below the limit
7	0.20	0.5	Below the limit
8	0.27	0.5	Below the limit
9	0.37	0.5	Below the limit
10	0.25	0.5	Below the limit
11	0.36	0.5	Below the limit
12	0.45	0.5	Near the limit
13	0.43	0.5	Near the limit
14	0.49	0.5	Near the limit
15	0.39	0.5	Below the limit
16	0.20	0.2	Above the limit
17	0.10	0.2	Below the limit
18	0.16	0.2	Below the limit
19	0.29	0.2	Above the limit
20	0.49	0.2	Above the limit
21	0.18	0.2	Near the limit
22	0.32	0.5	Below the limit
23	0.35	0.5	Below the limit
24	0.40	0.5	Near the limit
25	0.40	0.5	Near the limit
26	unknown	0.5	Reported without a count
27	unknown	0.5	Reported without a count
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	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	0.00	0.5	Below the limit
46	0.00	0.5	Below the limit
47	0.00	0.5	Below the limit
48	0.00	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

20230 of 11 weeks with a count above the limit (data from week 40)

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Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.01	0.5	Below the limit
41	unknown	0.5	Reported without a count
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	0.06	0.5	Below the limit
46	0.27	0.5	Below the limit
47	0.44	0.5	Near the limit
48	0.46	0.5	Near the limit
49	0.49	0.5	Near the limit
50	0.38	0.5	Below the limit
51	unknown	0.5	Reported without a count
52	0.15	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 52, 2023
Other treatment1 pen · Fresh Water Treatment
Week 51, 2023
Other treatment1 pen · Fresh Water Treatment
Week 50, 2023
Other treatment2 pens · Fresh Water Treatment

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

6 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
11 Sep 2026	Horda Pioneer	Skipperdalsneset	14 h 16 min
11 Sep 2026	Horda Pioneer	Skipperdalsneset	41 min
09 Apr 2026	Ronja Azul	Tollaksholmen	1 h 54 min
08 Apr 2026	Ronja Azul	Tollaksholmen	3 h 25 min
07 Apr 2026	Ronja Azul	Tollaksholmen	1 h 54 min
07 Apr 2026	Ronja Azul	Tollaksholmen	2 h 0 min
12 Dec 2025	Rostein	Kastevika	2 h 56 min
05 Dec 2025	Ronja Azul	Store Teistholmen Ø	7 h 17 min
19 Nov 2025	Ronja Azul	Rennaren	3 h 5 min
16 Oct 2025	Ronja Azul	Tollaksholmen	11 h 29 min
13 Oct 2025	Ronja Azul	Tollaksholmen	4 h 11 min
07 Oct 2025	Ronja Azul	Helgøy	9 h 52 min

Show 22 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
05 Oct 2025	Ronja Azul	Kilaneset	10 h 32 min
16 Aug 2025	Ronja Superior	Helgøy	35 min
13 Aug 2025	Ronja Superior	Helgøy	5 h 16 min
13 Aug 2025	Ronja Superior	Helgøy	1 h 33 min
12 Aug 2025	Ronja Superior	Helgøy	4 h 33 min
12 Aug 2025	Ronja Superior	Helgøy	1 h 56 min
12 Aug 2025	Ronja Superior	Skaganeset	1 h 26 min
15 Jul 2025	Ronja Azul	Helgøy	6 h 1 min
29 Jun 2025	Norwegian Gannet	Skreda	8 h 33 min
03 Dec 2024	Ronja Mistral	Gissøysundet S	1 h 25 min
02 Dec 2024	Ronja Mistral	Gissøysundet S	58 min
02 Dec 2024	Ronja Mistral	Gissøysundet S	1 h 41 min
01 Dec 2024	Ronja Mistral	Gissøysundet S	58 min
30 Nov 2024	Ronja Mistral	Gissøysundet S	1 h 30 min
29 Nov 2024	Ronja Mistral	Gissøysundet S	48 min
14 Nov 2024	Ronja Mistral	Jørstadskjera	1 h 19 min
02 Nov 2024	Ronja Azul	Oanes Sjø	3 h 1 min
01 Nov 2024	Ronja Azul	Helgøy	2 h 57 min
07 Jul 2024	Norwegian Gannet	Knappen disease or zone there	1 h 21 min
19 May 2024	Norwegian Gannet	Furevika	12 h 34 min
05 Apr 2024	Norwegian Gannet	Skaganeset	15 h 42 min
25 Mar 2024	Norwegian Gannet	Hovden	12 h 18 min

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

Who has reported

The companies that have submitted lice counts for this site, with the first and last week.

Company	From	To
Grieg Seafood Rogaland Sjø AS	Week 40, 2023	Week 47, 2025
Cermaq Finnmark Farming AS	Week 50, 2024	Week 50, 2024
Grieg Seafood Farming AS	Week 48, 2025	Week 39, 2026

Source: Norwegian Food Safety Authority (organisation number on each lice report)

Licences

Site MAB: 4,680 tonnes

Licence	Type	Capacity	Holder
R B 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R B 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R B 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R B 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	527 t	Grieg Seafood Farming AS
R K 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R KV 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R KV 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R S 0001	Forskning / matfiskSalmon, Rainbow trout, Trout	780 t	Skretting AS
R S 0002	Forskning / matfiskSalmon, Rainbow trout, Trout	780 t	Skretting AS
R SD 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R SD 0023	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Grieg Seafood Farming AS
R SD 0025	Kommersiell / stamfiskSalmon	780 t	Grieg Seafood Rogaland AS
R SD 0031	Kommersiell / stamfiskSalmon	780 t	Grieg Seafood Rogaland AS
R SD 0032	Kommersiell / stamfiskSalmon	780 t	Grieg Seafood Rogaland AS

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