Nedre Kvarv

Site 10513 · Sørfold municipality · Production area 9, Vestfjorden og Vesterålen

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

0.04Adult 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

5Lice treatments in 2026Latest: Mechanical delousing, week 37, 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

10Wellboat visits in 2026by 3 different vessels · latest 09 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 21–26 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	0.01	0.5	Below the limit
2	0.00	0.5	Below the limit
3	0.01	0.5	Below the limit
4	0.00	0.5	Below the limit
5	0.00	0.5	Below the limit
6	0.00	0.5	Below the limit
7	0.00	0.5	Below the limit
8	0.01	0.5	Below the limit
9	0.02	0.5	Below the limit
10	0.01	0.5	Below the limit
11	0.01	0.5	Below the limit
12	0.02	0.5	Below the limit
13	0.03	0.5	Below the limit
14	0.04	0.5	Below the limit
15	0.03	0.5	Below the limit
16	0.03	0.5	Below the limit
17	0.03	0.5	Below the limit
18	0.02	0.5	Below the limit
19	0.02	0.5	Below the limit
20	0.02	0.5	Below the limit
21	0.01	0.2	Below the limit
22	0.05	0.2	Below the limit
23	0.02	0.2	Below the limit
24	0.03	0.2	Below the limit
25	0.00	0.2	Below the limit
26	0.01	0.2	Below the limit
27	0.01	0.5	Below the limit
28	0.04	0.5	Below the limit
29	0.04	0.5	Below the limit
30	0.08	0.5	Below the limit
31	0.12	0.5	Below the limit
32	0.13	0.5	Below the limit
33	0.07	0.5	Below the limit
34	0.13	0.5	Below the limit
35	0.19	0.5	Below the limit
36	0.26	0.5	Below the limit
37	0.41	0.5	Near the limit
38	0.02	0.5	Below the limit
39	0.04	0.5	Below the limit

Earlier years

20250 of 36 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	0.13	0.5	Below the limit
2	0.17	0.5	Below the limit
3	0.21	0.5	Below the limit
4	0.43	0.5	Near the limit
5	0.36	0.5	Below the limit
6	0.28	0.5	Below the limit
7	0.26	0.5	Below the limit
8	0.25	0.5	Below the limit
9	0.25	0.5	Below the limit
10	0.28	0.5	Below the limit
11	0.30	0.5	Below the limit
12	0.29	0.5	Below the limit
13	0.34	0.5	Below the limit
14	0.33	0.5	Below the limit
15	0.22	0.5	Below the limit
16	0.24	0.5	Below the limit
17	0.21	0.5	Below the limit
18	0.23	0.5	Below the limit
19	0.28	0.5	Below the limit
20	0.14	0.5	Below the limit
21	0.15	0.2	Below the limit
22	unknown	0.2	Reported without a count
23	unknown	0.2	Reported without a count
24	unknown	0.2	Reported without a count
25	unknown	0.2	Not reported
26	unknown	0.2	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	0.00	0.5	Below the limit
44	0.00	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	0.00	0.5	Below the limit
49	0.01	0.5	Below the limit
50	0.01	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.00	0.5	Below the limit

20244 of 52 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	0.00	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	0.00	0.5	Below the limit
7	0.00	0.5	Below the limit
8	0.00	0.5	Below the limit
9	0.00	0.5	Below the limit
10	0.00	0.5	Below the limit
11	0.00	0.5	Below the limit
12	0.00	0.5	Below the limit
13	0.00	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.5	Below the limit
17	0.00	0.5	Below the limit
18	0.00	0.5	Below the limit
19	0.00	0.5	Below the limit
20	0.00	0.5	Below the limit
21	0.00	0.2	Below the limit
22	0.00	0.2	Below the limit
23	0.00	0.2	Below the limit
24	0.00	0.2	Below the limit
25	0.00	0.2	Below the limit
26	0.00	0.2	Below the limit
27	0.00	0.5	Below the limit
28	0.00	0.5	Below the limit
29	0.00	0.5	Below the limit
30	0.01	0.5	Below the limit
31	0.09	0.5	Below the limit
32	0.12	0.5	Below the limit
33	0.34	0.5	Below the limit
34	0.64	0.5	Above the limit
35	0.88	0.5	Above the limit
36	0.24	0.5	Below the limit
37	0.28	0.5	Below the limit
38	0.11	0.5	Below the limit
39	0.11	0.5	Below the limit
40	0.81	0.5	Above the limit
41	1.06	0.5	Above the limit
42	0.19	0.5	Below the limit
43	0.23	0.5	Below the limit
44	0.46	0.5	Near the limit
45	0.08	0.5	Below the limit
46	0.20	0.5	Below the limit
47	0.02	0.5	Below the limit
48	0.01	0.5	Below the limit
49	0.03	0.5	Below the limit
50	0.04	0.5	Below the limit
51	0.16	0.5	Below the limit
52	0.16	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

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Adult female lice per fish per week, 2023
Week	Lice limit	Status
40	0.5	Below the limit
41	0.5	Below the limit
42	0.5	Below the limit
43	0.5	Below the limit
44	0.5	Below the limit
45	0.5	Below the limit
46	0.5	Below the limit
47	0.5	Below the limit
48	0.5	Below the limit
49	0.5	Below the limit
50	0.5	Below the limit
51	0.5	Below the limit
52	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 37, 2026
Mechanical delousingWhole site
Week 5, 2026
Medicinal feed4 pens · Emamectin benzoat
Week 4, 2026
Medicinal feed5 pens · Emamectin benzoat
Week 3, 2026
Medicinal feed5 pens · Emamectin benzoat

Show all 18

Week 2, 2026
Medicinal feed5 pens · Emamectin benzoat
Week 47, 2025
Medicinal feed6 pens · Emamectin benzoat
Week 46, 2025
Medicinal feed6 pens · Emamectin benzoat
Week 14, 2025
Mechanical delousing1 pen
Week 5, 2025
Medicinal bath4 pens · Azamethiphos
Week 4, 2025
Medicinal bath5 pens · Azamethiphos
Week 47, 2024
Mechanical delousing7 pens
Week 46, 2024
Mechanical delousing2 pens
Week 45, 2024
Thermal delousing5 pens
Week 44, 2024
Thermal delousing2 pens
Week 42, 2024
Mechanical delousingWhole site
Week 38, 2024
Mechanical delousingWhole site
Week 36, 2024
Thermal delousingWhole site
Week 34, 2024
Thermal delousing3 pens

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

10 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 Sep 2026	Ronja Heroy	Hestvik	1 h 50 min
08 Sep 2026	Ronja Heroy	Hestvik	21 h 17 min
07 Sep 2026	Ronja Heroy	Hestvik	14 h 14 min
22 Jun 2026	Ro North	no other farm	7 h 48 min
17 Jun 2026	Ronja Boroy	Bukkholmen	29 h 51 min
16 Jun 2026	Ronja Boroy	Bukkholmen	4 h 31 min
29 May 2026	Ronja Boroy	Kines	3 h 3 min
29 May 2026	Ronja Boroy	Kines	2 h 2 min
28 May 2026	Ronja Boroy	Kines	2 h 44 min
28 May 2026	Ronja Boroy	Renga S	8 h 36 min
29 Oct 2025	Ro Spirit	Tussøya	4 h 50 min
21 Sep 2025	Rohav	Kvitfloget	2 h 43 min

Show 46 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
16 Sep 2025	Ronja Havsoy	Kalvhagan II	9 h 45 min
13 Sep 2025	Ronja Havsoy	Kalvhagan II	7 h 45 min
10 May 2025	Ro North	Hestøy	1 h 16 min
04 Apr 2025	Ronja Heroy	Kines	2 h 5 min
04 Apr 2025	Caspian	Alsvåg	3 h 8 min
03 Apr 2025	Ronja Heroy	Kines	31 min
02 Apr 2025	Ronja Heroy	Kines	2 h 21 min
02 Apr 2025	Ronja Heroy	Kines	3 h 7 min
29 Mar 2025	Froy Jarl	Hestøy	2 h 50 min
24 Mar 2025	Froy Jarl	Hestøy	3 h 42 min
17 Mar 2025	Froy Jarl	Hestøy	2 h 35 min
03 Mar 2025	Ronja Havsoy	Hestøy	2 h 37 min
01 Mar 2025	Ronja Havsoy	Hestøy	2 h 28 min
29 Jan 2025	Froy Jarl	no other farm	55 min
29 Jan 2025	Froy Jarl	no other farm	2 h 21 min
29 Jan 2025	Froy Jarl	no other farm	3 h 24 min
28 Jan 2025	Froy Jarl	no other farm	1 h 30 min
28 Jan 2025	Froy Jarl	no other farm	2 h 13 min
28 Jan 2025	Froy Jarl	no other farm	2 h 4 min
27 Jan 2025	Froy Jarl	no other farm	5 h 38 min
27 Jan 2025	Froy Jarl	no other farm	2 h 53 min
27 Jan 2025	Froy Jarl	no other farm	3 h 8 min
27 Jan 2025	Froy Jarl	no other farm	1 h 2 min
26 Jan 2025	Froy Jarl	no other farm	6 h 46 min
26 Jan 2025	Froy Jarl	no other farm	5 h 8 min
25 Jan 2025	Froy Jarl	no other farm	1 h 33 min
25 Jan 2025	Froy Jarl	no other farm	3 h 32 min
24 Jan 2025	Froy Jarl	no other farm	5 h 12 min
24 Jan 2025	Froy Jarl	no other farm	5 h 21 min
19 Nov 2024	Ronja Heroy	Kines	5 h 36 min
18 Nov 2024	Ronja Heroy	Kines	18 h 34 min
17 Nov 2024	Ronja Heroy	Kines	8 h 37 min
05 Nov 2024	Ro North	Kines	21 h 52 min
03 Nov 2024	Ro North	Kines	25 h 50 min
03 Nov 2024	Ro North	Kines	2 h 18 min
03 Nov 2024	Ro North	Kalvik	1 h 59 min
19 Sep 2024	Ronja Heroy	Gyltneset	31 h 8 min
18 Sep 2024	Ronja Heroy	Gyltneset	12 h 47 min
04 Sep 2024	Ro North	Storvika V	7 h 26 min
03 Sep 2024	Ro North	Storvika V	3 h 33 min
03 Sep 2024	Ro North	Storvika V	17 h 28 min
02 Sep 2024	Ro North	Storvika V	19 h 14 min
20 Aug 2024	Ro North	Kines	1 h 33 min
20 Aug 2024	Ro North	Kines	3 h 5 min
19 Aug 2024	Ro North	Kines	3 h 45 min
19 Aug 2024	Ro North	Kalvik	2 h 39 min

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

Licences

Site MAB: 5,400 tonnes

Licence	Type	Capacity	Holder
N HR 0018	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N HR 0020	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0008	Kommersiell / matfiskSalmon, Rainbow trout, Trout	831 t	Mowi Seawater Norway AS
N SF 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0012	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS
N SF 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	812 t	Mowi Seawater Norway AS

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