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The Salmon Ledger
NOEN

Røysa

Site 12298 · Giske municipality · Production area 5, Stadt til Hustadvika

Below the lice limit, week 39Operated by Mowi Seawater Norway AS · group Mowi
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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 5 weeks with a countCalculated 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
2Wellboat visits in 2026by 2 different vessels · latest 31 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
Show as table
Adult female lice per fish per week, 2026
WeekAdult female lice per fishLice limitStatus
1unknown0.5Not reported
2unknown0.5Not reported
3unknown0.5Not reported
4unknown0.5Not reported
5unknown0.5Not reported
6unknown0.5Not reported
7unknown0.5Not reported
8unknown0.5Not reported
9unknown0.5Not reported
10unknown0.5Not reported
11unknown0.5Not reported
12unknown0.5Not reported
13unknown0.5Not reported
14unknown0.5Not reported
15unknown0.5Not reported
16unknown0.2Not reported
17unknown0.2Not reported
18unknown0.2Not reported
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
350.000.5Below the limit
360.000.5Below the limit
370.000.5Below the limit
380.000.5Below the limit
390.000.5Below the limit

Earlier years

20252 of 46 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
10.010.5Below the limit
20.030.5Below the limit
30.090.5Below the limit
40.090.5Below the limit
50.130.5Below the limit
60.140.5Below the limit
70.120.5Below the limit
80.110.5Below the limit
90.110.5Below the limit
100.150.5Below the limit
110.110.5Below the limit
120.190.5Below the limit
130.210.5Below the limit
140.240.5Below the limit
150.010.5Below the limit
160.010.2Below the limit
170.010.2Below the limit
180.030.2Below the limit
190.030.2Below the limit
200.010.2Below the limit
210.040.2Below the limit
220.030.5Below the limit
230.070.5Below the limit
240.170.5Below the limit
250.200.5Below the limit
260.210.5Below the limit
270.460.5Near the limit
280.550.5Above the limit
290.320.5Below the limit
300.220.5Below the limit
310.380.5Below the limit
323.670.5Above the limit
330.430.5Near the limit
340.460.5Near the limit
350.480.5Near the limit
360.340.5Below the limit
370.170.5Below the limit
380.370.5Below the limit
390.470.5Near the limit
400.470.5Near the limit
410.170.5Below the limit
420.170.5Below the limit
430.150.5Below the limit
440.150.5Below the limit
450.370.5Below the limit
460.380.5Below the limit
47unknown0.5Reported without a count
48unknown0.5Not reported
49unknown0.5Not reported
50unknown0.5Not reported
51unknown0.5Not reported
52unknown0.5Not reported
20240 of 38 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, 2024
WeekAdult female lice per fishLice limitStatus
10.140.5Below the limit
20.030.5Below the limit
30.030.5Below the limit
40.040.5Below the limit
50.060.5Below the limit
60.060.5Below the limit
70.060.5Below the limit
80.080.5Below the limit
90.100.5Below the limit
100.080.5Below the limit
110.110.5Below the limit
120.110.5Below the limit
130.160.5Below the limit
140.180.5Below the limit
150.190.5Below the limit
160.150.2Below the limit
170.140.2Below the limit
180.110.2Below the limit
190.130.2Below the limit
200.140.2Below the limit
210.180.2Near the limit
220.190.5Below the limit
230.340.5Below the limit
240.090.5Below the limit
250.070.5Below the limit
260.130.5Below the limit
270.210.5Below the limit
280.200.5Below the limit
290.220.5Below the limit
300.320.5Below the limit
310.280.5Below the limit
320.200.5Below the limit
33unknown0.5Reported without a count
34unknown0.5Reported without a count
35unknown0.5Reported without a count
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
470.000.5Below the limit
480.000.5Below the limit
490.000.5Below the limit
500.000.5Below the limit
510.000.5Below the limit
520.000.5Below 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
400.010.5Below the limit
410.030.5Below the limit
420.020.5Below the limit
430.010.5Below the limit
440.030.5Below the limit
450.030.5Below the limit
460.040.5Below the limit
470.020.5Below the limit
480.090.5Below the limit
490.120.5Below the limit
500.160.5Below the limit
510.260.5Below the limit
520.330.5Below the limit

Treatments

Norwegian Food Safety Authority
  • Week 41, 2025
    Mechanical delousing1 pen
  • Week 40, 2025
    Mechanical delousing2 pens
  • Week 37, 2025
    Mechanical delousing4 pens
  • Week 36, 2025
    Mechanical delousing5 pens
Show all 19
  • Week 35, 2025
    Mechanical delousingWhole site
  • Week 33, 2025
    Mechanical delousing6 pens
  • Week 29, 2025
    Mechanical delousing4 pens
  • Week 28, 2025
    Thermal delousing5 pens
  • Week 16, 2025
    Thermal delousing4 pens
  • Week 15, 2025
    Thermal delousing4 pens
  • Week 3, 2025
    Medicinal feedWhole site · Emamectin benzoat
  • Week 2, 2025
    Medicinal feedWhole site · Emamectin benzoat
  • Week 27, 2024
    Mechanical delousing6 pens
  • Week 24, 2024
    Mechanical delousingWhole site
  • Week 16, 2024
    Thermal delousing3 pens
  • Week 1, 2024
    Freshwater treatment3 pens
  • Week 52, 2023
    Freshwater treatment2 pens
  • Week 42, 2023
    Freshwater treatment3 pens
  • Week 41, 2023
    Freshwater treatment4 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

2 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
31 Aug 2026RobrisHestøy1 h 43 min
30 Aug 2026LangsundOddane5 h 33 min
26 Nov 2025Ro FjordKrabbestig4 h 3 min
25 Nov 2025Ro FjordKrabbestig3 h 5 min
24 Nov 2025Ro FjordKrabbestig2 h 40 min
19 Nov 2025Ro FjordEggesbønes4 h 6 min
06 Oct 2025Ronja MistralGrunneneset11 h 57 min
05 Oct 2025Ronja MistralGrunneneset13 h 49 min
04 Oct 2025Ro FjordEggesbønes1 h 11 min
03 Oct 2025Ronja MistralGrunneneset20 h 11 min
02 Oct 2025Ro FjordEggesbønes5 h 23 min
02 Oct 2025Froy JarlEggesbønes3 h 56 min
Show 52 older visits
ArrivalVesselPrevious farm (14 days)Duration
02 Oct 2025Ronja MistralGrunneneset10 h 44 min
01 Oct 2025Ro FjordEggesbønes3 h 44 min
01 Oct 2025Froy JarlHegnes4 h 26 min
30 Sep 2025Ro FjordEggesbønes4 h 22 min
28 Sep 2025Ro FjordLangeråa disease or zone there4 h 28 min
27 Aug 2025Ronja MistralKyravika14 h 18 min
17 Aug 2025Ronja MistralJuvika B14 h 41 min
16 Aug 2025Ronja MistralJuvika B6 h 45 min
15 Aug 2025Ronja MistralJuvika B20 h 39 min
15 Aug 2025Ronja MistralJuvika B14 h 3 min
14 Aug 2025Ronja MistralJuvika B14 h 21 min
16 Jul 2025Ronja MistralJuvika B26 h 19 min
16 Jul 2025Ronja MistralJuvika B3 h 20 min
15 Jul 2025Ronja MistralJuvika B7 h 21 min
12 Jul 2025Ronja BoroyEggesbønes23 h 11 min
12 Jul 2025Ro WestKyravika17 h 18 min
15 Apr 2025Ro FjellOpshaugvik Land13 h 25 min
14 Apr 2025Ro FjellOpshaugvik Land22 h 35 min
13 Apr 2025Ro FjellOpshaugvik Land9 h 7 min
12 Apr 2025Ro FjellOpshaugvik Land22 h 45 min
11 Apr 2025Ro FjellOpshaugvik Land12 h 19 min
25 Nov 2024Ronja EvolutionOlderøy3 h 34 min
20 Nov 2024Ronja EvolutionOlderøy2 h 50 min
14 Nov 2024Ronja EvolutionBrattholmen6 h 20 min
13 Nov 2024Ronja EvolutionBrattholmen1 h 5 min
31 Aug 2024Ro FjordGudmundset1 h 42 min
30 Aug 2024Ro FjordOksebåsen V56 min
21 Aug 2024Ro FjordEggesbønes1 h 30 min
13 Aug 2024Ro FjordEggesbønes2 h 46 min
12 Aug 2024Ro FjordEggesbønes1 h 32 min
12 Aug 2024Ronja SkilsoyEggesbønes4 h 1 min
11 Aug 2024Ro FjordEggesbønes1 h 34 min
08 Aug 2024Ro FjordRogne11 h 59 min
31 Jul 2024Ro FjordEggesbønes3 h 17 min
04 Jul 2024Ronja SkilsoyEggesbønes2 h 16 min
03 Jul 2024Ronja SkilsoyEggesbønes4 h 46 min
10 Jun 2024Ronja BoroyDjupevik3 h 37 min
10 Jun 2024Ro FjordEggesbønes3 h 18 min
03 Jun 2024Ro FjordBrattholmen1 h 21 min
26 May 2024Ro FjordKrabbestig1 h 43 min
13 May 2024Ro FjordEggesbønes3 h 7 min
25 Apr 2024Ro FjordEggesbønes2 h 11 min
17 Apr 2024Ro WestRogne30 h 6 min
15 Apr 2024Ro FjordRindarøy1 h 44 min
04 Apr 2024Ro FjordEggesbønes2 h 45 min
05 Mar 2024Ronja BoroyEggesbønes3 h 17 min
07 Jan 2024Ronja Skilsoyno other farm24 h 36 min
06 Jan 2024Ronja Skilsoyno other farm2 h 44 min
05 Jan 2024Ronja Skilsoyno other farm17 h 5 min
04 Jan 2024Ronja Skilsoyno other farm2 h 48 min
03 Jan 2024Ronja Skilsoyno other farm17 h 17 min
02 Jan 2024Ronja Skilsoyno other farm19 h 43 min

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

Licences

Site MAB: 4,680 tonnes
LicenceTypeCapacityHolder
M AK 0002Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMowi Seawater Norway AS
M G 0001Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMowi Seawater Norway AS
M H 0019Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMowi Seawater Norway AS
M SM 0001Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMowi Seawater Norway AS
M SM 0015Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMowi Seawater Norway AS
M VD 0001Kommersiell / matfiskSalmon, Rainbow trout, Trout733 tMowi Seawater Norway AS

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