Ramstadholmen

Site 13581 · Nærøysund municipality · Production area 7, Nord-Trøndelag med Bindal

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

unknownAdult female lice per fishNo count in week 39. Latest: 0.00 in week 20, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 20 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

1Lice treatments in 2026Latest: Mechanical delousing, week 4, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Active disease casesILA, suspected 11 May 2026Register since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

3Wellboat visits in 2026by 1 vessel · latest 21 Jan 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	0.15	0.5	Below the limit
2	0.18	0.5	Below the limit
3	0.15	0.5	Below the limit
4	0.00	0.5	Below the limit
5	0.18	0.5	Below the limit
6	0.21	0.5	Below the limit
7	0.18	0.5	Below the limit
8	0.20	0.5	Below the limit
9	0.16	0.5	Below the limit
10	0.18	0.5	Below the limit
11	0.15	0.5	Below the limit
12	0.13	0.5	Below the limit
13	0.05	0.5	Below the limit
14	0.14	0.5	Below the limit
15	0.13	0.5	Below the limit
16	0.12	0.2	Below the limit
17	0.19	0.2	Near the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.00	0.2	Below the limit
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	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

Earlier years

20250 of 9 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	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	0.19	0.5	Below the limit
45	0.30	0.5	Below the limit
46	0.40	0.5	Near the limit
47	0.35	0.5	Below the limit
48	0.14	0.5	Below the limit
49	0.17	0.5	Below the limit
50	0.00	0.5	Below the limit
51	0.15	0.5	Below the limit
52	0.19	0.5	Below the limit

20240 of 9 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	0.18	0.5	Below the limit
2	0.21	0.5	Below the limit
3	0.22	0.5	Below the limit
4	0.23	0.5	Below the limit
5	0.22	0.5	Below the limit
6	0.23	0.5	Below the limit
7	0.21	0.5	Below the limit
8	0.23	0.5	Below the limit
9	0.27	0.5	Below the limit
10	unknown	0.5	Reported without a count
11	unknown	0.5	Reported without a count
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	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	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	0.00	0.5	Below the limit
42	0.19	0.5	Below the limit
43	0.07	0.5	Below the limit
44	0.13	0.5	Below the limit
45	0.20	0.5	Below the limit
46	0.44	0.5	Near the limit
47	0.15	0.5	Below the limit
48	0.23	0.5	Below the limit
49	0.20	0.5	Below the limit
50	0.25	0.5	Below the limit
51	0.14	0.5	Below the limit
52	0.16	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 4, 2026
Mechanical delousingWhole site
Week 50, 2025
Thermal delousingWhole site
Week 47, 2025
Thermal delousingWhole site
Week 47, 2023
Mechanical delousing1 pen

Show all 6

Week 46, 2023
Thermal delousing3 pens
Week 43, 2023
Thermal delousingWhole site

Disease

Norwegian Food Safety Authority

11 May 2026
Infectious salmon anaemia (ISA): suspectedStatus: active · started 11 May 2026 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

3 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
21 Jan 2026	Ronja Heroy	Stokkasjøen	6 h 1 min
20 Jan 2026	Ronja Heroy	Stokkasjøen	18 h 12 min
19 Jan 2026	Ronja Heroy	Stokkasjøen	10 h 50 min
10 Dec 2025	Ronja Boroy	Hestøy	35 h 57 min
09 Dec 2025	Ronja Boroy	Hestøy	10 h 8 min
21 Nov 2025	Ronja Boroy	Geitryggen	8 h 42 min
20 Nov 2025	Ronja Boroy	Geitryggen	19 h 29 min
25 Oct 2025	Ronja Heroy	Geitryggen	5 h 46 min
25 Oct 2025	Ronja Heroy	Geitryggen	1 h 22 min
25 Oct 2025	Ronja Heroy	Geitryggen	1 h 48 min
25 Oct 2025	Ronja Heroy	Geitryggen	1 h 26 min
24 Oct 2025	Ronja Heroy	Geitryggen	2 h 0 min

Show 7 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
24 Oct 2025	Ronja Heroy	Geitryggen	1 h 38 min
24 Oct 2025	Ronja Heroy	Geitryggen	3 h 10 min
23 Oct 2025	Ronja Heroy	Geitryggen	1 h 45 min
17 Mar 2024	Ronja Havsoy	Hestøy	4 h 40 min
14 Mar 2024	Ronja Havsoy	Geitryggen	1 h 23 min
06 Mar 2024	Ro North	Hestøy	1 h 48 min
04 Mar 2024	Ronja Havsoy	Hestøy	1 h 59 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 NR 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS
NT NR 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Mowi Seawater Norway AS

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