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The Salmon Ledger
NOEN

Slettvika

Site 20815 · Ørsta municipality · Production area 5, Stadt til Hustadvika

Near the lice limit, week 39Operated by Måsøval Lisens AS
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0.41Adult female lice per fishLimit 0.50 · near 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
13Lice treatments in 2026Latest: Mechanical delousing, week 36, 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
8Wellboat visits in 2026by 3 different vessels · latest 23 Jul 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
Show as table
Adult female lice per fish per week, 2026
WeekAdult female lice per fishLice limitStatus
10.000.5Below the limit
20.000.5Below the limit
30.000.5Below the limit
40.000.5Below the limit
50.000.5Below the limit
60.010.5Below the limit
70.000.5Below the limit
80.010.5Below the limit
90.000.5Below the limit
100.100.5Below the limit
110.030.5Below the limit
120.110.5Below the limit
130.050.5Below the limit
140.230.5Below the limit
150.310.5Below the limit
160.010.2Below the limit
170.000.2Below the limit
180.000.2Below the limit
190.000.2Below the limit
200.050.2Below the limit
210.030.2Below the limit
220.080.5Below the limit
230.200.5Below the limit
240.460.5Near the limit
250.010.5Below the limit
260.100.5Below the limit
270.110.5Below the limit
280.080.5Below the limit
290.360.5Below the limit
300.080.5Below the limit
310.270.5Below the limit
320.190.5Below the limit
330.170.5Below the limit
340.300.5Below the limit
350.360.5Below the limit
360.080.5Below the limit
370.120.5Below the limit
380.320.5Below the limit
390.410.5Near the limit

Earlier years

20250 of 34 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
Show as table
Adult female lice per fish per week, 2025
WeekAdult female lice per fishLice limitStatus
10.090.5Below the limit
20.270.5Below the limit
30.250.5Below the limit
40.360.5Below the limit
50.390.5Below the limit
60.450.5Near the limit
70.080.5Below the limit
80.080.5Below the limit
90.060.5Below the limit
100.170.5Below the limit
110.230.5Below the limit
120.280.5Below the limit
130.290.5Below the limit
140.410.5Near the limit
150.490.5Near the limit
160.000.2Below the limit
170.000.2Below the limit
180.030.2Below the limit
190.000.2Below the limit
200.030.2Below the limit
210.020.2Below the limit
220.100.5Below the limit
230.280.5Below the limit
240.370.5Below the limit
250.480.5Near the limit
260.190.5Below the limit
270.020.5Below the limit
280.070.5Below the limit
290.340.5Below the limit
300.380.5Below the limit
310.480.5Near the limit
32unknown0.5Reported without a count
33unknown0.5Reported without a count
34unknown0.5Not reported
35unknown0.5Not reported
36unknown0.5Not reported
37unknown0.5Not reported
38unknown0.5Not reported
39unknown0.5Not reported
40unknown0.5Not reported
41unknown0.5Not reported
42unknown0.5Not reported
43unknown0.5Not reported
44unknown0.5Not reported
45unknown0.5Not reported
46unknown0.5Not reported
47unknown0.5Not reported
48unknown0.5Not reported
49unknown0.5Not reported
500.000.5Below the limit
510.000.5Below the limit
520.000.5Below the limit
20241 of 32 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
WeekAdult female lice per fishLice limitStatus
10.230.5Below the limit
20.260.5Below the limit
30.200.5Below the limit
40.340.5Below the limit
50.170.5Below the limit
60.360.5Below the limit
70.260.5Below the limit
80.330.5Below the limit
90.260.5Below the limit
100.330.5Below the limit
110.260.5Below the limit
120.330.5Below the limit
130.190.5Below the limit
140.360.5Below the limit
150.330.5Below the limit
160.890.2Above the limit
17unknown0.2Reported without a count
18unknown0.2Reported without a count
19unknown0.2Not reported
20unknown0.2Not reported
21unknown0.2Not reported
22unknown0.5Not reported
23unknown0.5Not reported
24unknown0.5Not reported
25unknown0.5Not reported
26unknown0.5Not reported
27unknown0.5Not reported
28unknown0.5Not reported
29unknown0.5Not reported
30unknown0.5Not reported
31unknown0.5Not reported
32unknown0.5Not reported
33unknown0.5Not reported
34unknown0.5Not reported
35unknown0.5Not reported
36unknown0.5Not reported
370.000.5Below the limit
380.000.5Below the limit
390.000.5Below the limit
400.020.5Below the limit
410.300.5Below the limit
420.350.5Below the limit
430.480.5Near the limit
440.470.5Near the limit
450.340.5Below the limit
460.320.5Below the limit
470.120.5Below the limit
480.250.5Below the limit
490.230.5Below the limit
500.460.5Near the limit
510.330.5Below the limit
520.410.5Near 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
Show as table
Adult female lice per fish per week, 2023
WeekAdult female lice per fishLice limitStatus
400.050.5Below the limit
410.360.5Below the limit
420.350.5Below the limit
430.230.5Below the limit
440.450.5Near the limit
450.230.5Below the limit
460.240.5Below the limit
470.180.5Below the limit
480.220.5Below the limit
490.350.5Below the limit
500.330.5Below the limit
510.260.5Below the limit
520.440.5Near the limit

Treatments

Norwegian Food Safety Authority
  • Week 36, 2026
    Mechanical delousing5 pens
  • Week 30, 2026
    Thermal delousing, Freshwater treatment12 pens
  • Week 25, 2026
    Thermal delousing, Freshwater treatment8 pens
  • Week 16, 2026
    Thermal delousing, Freshwater treatment8 pens
Show all 14
  • Week 26, 2025
    Other treatment3 pens · Ferskvann + termisk
  • Week 25, 2025
    Other treatment3 pens · Ferskvann + termisk
  • Week 16, 2025
    Freshwater treatment, Thermal delousing6 pens
  • Week 15, 2025
    Thermal delousing, Freshwater treatment4 pens
  • Week 7, 2025
    Thermal delousingWhole site
  • Week 1, 2025
    Thermal delousing3 pens
  • Week 47, 2024
    Thermal delousing3 pens
  • Week 42, 2024
    Mechanical delousing2 pens
  • Week 2, 2024
    Medicinal bath1 pen · Azamethiphos
  • Week 1, 2024
    Medicinal bath2 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

8 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.

ArrivalVesselPrevious farm (14 days)Duration
23 Jul 2026Ro VentureHesteneset18 h 48 min
22 Jul 2026Ro VentureHesteneset2 h 23 min
22 Jul 2026Ro VentureHesteneset8 h 10 min
21 Jul 2026Ro VentureHesteneset17 h 49 min
17 Jun 2026Ro VentureRindarøy27 h 23 min
16 Jun 2026Ro VentureRindarøy8 h 48 min
16 Apr 2026Ro Serverno other farm27 h 57 min
25 Jan 2026LangsundHågardsneset1 h 4 min
16 Dec 2025ViknatransAursøysva1 h 21 min
16 Dec 2025ViknatransAursøysva4 h 39 min
14 Aug 2025Ro MasterRindarøy1 h 23 min
13 Aug 2025Ro MasterRindarøy1 h 26 min
Show 48 older visits
ArrivalVesselPrevious farm (14 days)Duration
12 Aug 2025Ro MasterFurneset1 h 57 min
08 Aug 2025Ro MasterRindarøy1 h 17 min
07 Aug 2025Ro MasterHesteneset2 h 6 min
04 Aug 2025Ro SailorRindarøy2 h 30 min
03 Aug 2025Ro SailorRindarøy1 h 32 min
27 Jul 2025Ro SailorRindarøy1 h 29 min
12 Jul 2025TonnyLangskjæra51 min
05 Jul 2025RobasGjermundnes1 h 50 min
29 Jun 2025Ro MasterRindarøy1 h 28 min
27 Jun 2025Ro FjellOpshaugvik Land6 h 6 min
26 Jun 2025Ro FjellOpshaugvik Land18 h 18 min
25 Jun 2025Ro FjellOpshaugvik Land12 h 54 min
22 Jun 2025Ro FjellOpshaugvik Land36 h 30 min
09 May 2025TonnyHaneholmen49 min
15 Apr 2025Ro VentureOpshaugvik Land32 h 57 min
14 Apr 2025Ro VentureAldeøyna8 h 25 min
13 Apr 2025Ro VentureAldeøyna11 h 20 min
13 Apr 2025Ro VentureAldeøyna33 min
13 Apr 2025RobrisHesteneset1 h 53 min
12 Apr 2025RobrisHesteneset5 h 59 min
12 Apr 2025Ro VentureAldeøyna12 h 57 min
16 Feb 2025Ro FjellFlåtegrunnen7 h 22 min
15 Feb 2025Ro FjellFlåtegrunnen17 h 24 min
31 Dec 2024Ro ServerMåren16 h 29 min
31 Dec 2024Ro ServerMåren4 h 51 min
30 Dec 2024Ro ServerMåren8 h 7 min
26 Nov 2024Ro Fjellno other farm8 h 11 min
25 Nov 2024Ro Fjellno other farm9 h 59 min
03 Nov 2024TonnyKvangardsnes59 min
05 Sep 2024Ro SpiritHestøy4 h 25 min
04 Sep 2024Ro SpiritHestøy2 h 58 min
03 Sep 2024Ro SpiritHestøy1 h 14 min
03 May 2024RosteinRindarøy45 min
03 May 2024RosteinRindarøy59 min
01 May 2024Ro FortuneHesteneset2 h 16 min
30 Apr 2024RosteinRindarøy1 h 53 min
29 Apr 2024Ro FortuneGjerde3 h 12 min
28 Apr 2024Ro FortuneGjerde1 h 6 min
28 Apr 2024RosteinRindarøy2 h 48 min
25 Apr 2024RosteinRindarøy1 h 10 min
24 Apr 2024RosteinHesteneset1 h 24 min
18 Apr 2024Ro VentureUtåker6 h 10 min
15 Jan 2024Ro ServerBleket38 min
14 Jan 2024Ro ServerBleket5 h 29 min
14 Jan 2024Ro ServerBleket5 h 1 min
02 Jan 2024Ro Spiritno other farm2 h 0 min
02 Jan 2024Ro Spiritno other farm3 h 33 min
02 Jan 2024Ro Spiritno other farm1 h 54 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.

CompanyFromTo
Måsøval Drift ASWeek 40, 2023Week 3, 2025
Måsøval Lisens ASWeek 4, 2025Week 39, 2026

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

Licences

Site MAB: 4,680 tonnes
LicenceTypeCapacityHolder
M AV 0028Undervisning / matfiskSalmon780 tMøre Og Romsdal Fylkeskommune
M SM 0011Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMåsøval Lisens AS
M VA 0008Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMåsøval Lisens AS
M VD 0009Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMåsøval Lisens AS
M VD 0036Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMåsøval Lisens AS
ST HE 0018Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMåsøval Lisens AS
ST SI 0002Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMåsøval Lisens AS

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