Tendalsvik

Site 21755 · Etne municipality · Production area 3, Karmøy til Sotra

Status unknown: not reported in week 39Operated by Mowi Seawater Norway AS

unknownAdult female lice per fishNo count in week 39. Latest: 0.42 in week 29, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 29 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

5Lice treatments in 2026Latest: Mechanical delousing, week 27, 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

15Wellboat visits in 2026by 4 different vessels · latest 09 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	0.13	0.5	Below the limit
2	0.05	0.5	Below the limit
3	0.19	0.5	Below the limit
4	0.12	0.5	Below the limit
5	0.47	0.5	Near the limit
6	0.24	0.5	Below the limit
7	0.37	0.5	Below the limit
8	0.14	0.5	Below the limit
9	0.28	0.5	Below the limit
10	0.19	0.5	Below the limit
11	0.07	0.5	Below the limit
12	0.08	0.5	Below the limit
13	0.25	0.5	Below the limit
14	0.34	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	0.05	0.2	Below the limit
20	0.13	0.2	Below the limit
21	0.18	0.2	Near the limit
22	0.15	0.5	Below the limit
23	0.32	0.5	Below the limit
24	0.07	0.5	Below the limit
25	0.07	0.5	Below the limit
26	0.25	0.5	Below the limit
27	0.07	0.5	Below the limit
28	0.28	0.5	Below the limit
29	0.42	0.5	Near the limit
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

Earlier years

20250 of 39 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	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	0.02	0.2	Below the limit
21	0.01	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	0.03	0.5	Below the limit
28	0.05	0.5	Below the limit
29	0.03	0.5	Below the limit
30	0.03	0.5	Below the limit
31	0.07	0.5	Below the limit
32	0.05	0.5	Below the limit
33	0.04	0.5	Below the limit
34	0.04	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.01	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.03	0.5	Below the limit
39	0.02	0.5	Below the limit
40	0.23	0.5	Below the limit
41	0.07	0.5	Below the limit
42	0.00	0.5	Below the limit
43	0.01	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.04	0.5	Below the limit
46	0.03	0.5	Below the limit
47	0.02	0.5	Below the limit
48	0.01	0.5	Below the limit
49	0.01	0.5	Below the limit
50	0.03	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.06	0.5	Below the limit

20241 of 27 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	0.43	0.5	Near the limit
2	0.44	0.5	Near the limit
3	0.35	0.5	Below the limit
4	0.44	0.5	Near the limit
5	0.45	0.5	Near the limit
6	0.24	0.5	Below the limit
7	0.30	0.5	Below the limit
8	0.16	0.5	Below the limit
9	0.32	0.5	Below the limit
10	0.41	0.5	Near the limit
11	0.38	0.5	Below the limit
12	0.01	0.5	Below the limit
13	0.01	0.5	Below the limit
14	0.03	0.5	Below the limit
15	0.05	0.5	Below the limit
16	0.01	0.2	Below the limit
17	0.08	0.2	Below the limit
18	0.06	0.2	Below the limit
19	0.11	0.2	Below the limit
20	0.16	0.2	Below the limit
21	0.27	0.2	Above the limit
22	0.28	0.5	Below the limit
23	0.44	0.5	Near the limit
24	0.13	0.5	Below the limit
25	0.38	0.5	Below the limit
26	0.48	0.5	Near the limit
27	0.49	0.5	Near the limit
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

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	0.00	0.5	Below the limit
41	0.01	0.5	Below the limit
42	0.16	0.5	Below the limit
43	0.06	0.5	Below the limit
44	0.01	0.5	Below the limit
45	0.03	0.5	Below the limit
46	0.00	0.5	Below the limit
47	0.03	0.5	Below the limit
48	0.04	0.5	Below the limit
49	0.07	0.5	Below the limit
50	0.16	0.5	Below the limit
51	0.10	0.5	Below the limit
52	0.14	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 27, 2026
Mechanical delousingWhole site
Week 21, 2026
Thermal delousing1 pen
Week 11, 2026
Mechanical delousing3 pens
Week 7, 2026
Mechanical delousing1 pen

Show all 12

Week 6, 2026
Mechanical delousing2 pens
Week 19, 2025
Medicinal feed5 pens · Emamectin benzoat
Week 24, 2024
Thermal delousing2 pens
Week 22, 2024
Thermal delousing4 pens
Week 21, 2024
Mechanical delousing1 pen
Week 11, 2024
Mechanical delousing1 pen
Week 6, 2024
Mechanical delousing2 pens
Week 3, 2024
Medicinal bath3 pens · Azamethiphos

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

15 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
09 Aug 2026	Ronja Merdoe	Djupevik	3 h 49 min
06 Aug 2026	Ronja Merdoe	Djupevik	4 h 9 min
05 Aug 2026	Ronja Maloy	Utåker	3 h 37 min
04 Aug 2026	Ronja Merdoe	Djupevik	5 h 13 min
03 Aug 2026	Tauranga	Napp	3 h 17 min
18 May 2026	Ronja Maloy	Sagen 2	6 h 34 min
08 May 2026	Froy Jarl	Utåker	8 h 10 min
07 May 2026	Froy Jarl	Utåker	2 h 9 min
23 Apr 2026	Ronja Merdoe	Utåker	7 h 9 min
21 Apr 2026	Ronja Merdoe	Utåker	6 h 7 min
16 Apr 2026	Ronja Merdoe	Utåker	4 h 56 min
15 Apr 2026	Tauranga	Utåker	7 h 18 min

Show 34 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
23 Feb 2026	Tauranga	Pinnen	11 h 4 min
22 Feb 2026	Ronja Merdoe	Utåker	3 h 12 min
30 Jan 2026	Tauranga	Lindvik	12 h 17 min
04 Apr 2025	Ro Sailor	Oksen	1 h 36 min
28 Mar 2025	Ro Sailor	Salvågvika	1 h 52 min
27 Jul 2024	Ronja Maloy	Skorpeosen	1 h 33 min
26 Jul 2024	Tauranga	Utåker	9 h 58 min
25 Jul 2024	Ronja Maloy	no other farm	3 h 23 min
24 Jul 2024	Tauranga	Utåker	5 h 27 min
08 Jul 2024	Tauranga	Langevågen disease or zone there	10 h 45 min
03 Jul 2024	Tauranga	Langevågen	10 h 47 min
01 Jul 2024	Tauranga	Langevågen	10 h 2 min
13 Jun 2024	Ro Arctic	Oksen	11 h 42 min
04 Jun 2024	Ronja Merdoe	Salvågvika	1 h 53 min
01 Jun 2024	Hordagut	Sagen 2	13 h 42 min
31 May 2024	Hordagut	Sagen 2	14 h 55 min
27 May 2024	Tauranga	Pinnen	5 h 59 min
26 May 2024	Ronja Merdoe	Pinnen	4 h 6 min
24 May 2024	Ronja Boroy	Skorpeosen	1 h 6 min
23 May 2024	Ronja Boroy	Skorpeosen	15 h 44 min
18 Mar 2024	Ronja Azul	Utåker	11 h 58 min
17 Mar 2024	Ronja Azul	Utåker	6 h 6 min
16 Mar 2024	Ronja Azul	Utåker	11 h 16 min
01 Mar 2024	Tauranga	Djupevik	6 h 25 min
28 Feb 2024	Tauranga	Djupevik	8 h 41 min
26 Feb 2024	Tauranga	Djupevik	7 h 46 min
08 Feb 2024	Ronja Azul	Kjeahola disease or zone there	14 h 26 min
06 Feb 2024	Ronja Azul	Kjeahola disease or zone there	14 h 39 min
19 Jan 2024	Ronja Maloy	Skorpeosen	1 h 45 min
19 Jan 2024	Ronja Maloy	Skorpeosen	5 h 29 min
19 Jan 2024	Ronja Azul	Utåker	2 h 42 min
18 Jan 2024	Ronja Maloy	Skorpeosen	2 h 8 min
18 Jan 2024	Ronja Azul	Utåker	4 h 10 min
18 Jan 2024	Ronja Maloy	Skorpeosen	4 h 50 min

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

Licences

Site MAB: 2,640 tonnes

Licence	Type	Capacity	Holder
H E 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H F 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H F 0008	Kommersiell / matfiskSalmon, Rainbow trout, Trout	2,068 t	Mowi Seawater Norway AS
H F 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	2,068 t	Mowi Seawater Norway AS
H F 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H F 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H J 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H J 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H K 0028	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,447 t	Mowi Seawater Norway AS
H K 0037	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS
H K 0039	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Mowi Seawater Norway AS

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