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The Salmon Ledger
NOEN

Ringholmen

Site 12784 · Hitra municipality · Production area 6, Nordmøre og Sør-Trøndelag

Below the lice limit, week 39Operated by Lerøy Midt Sjø AS · group Lerøy Seafood Group
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0.19Adult 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
32Lice treatments in 2026Latest: Mechanical delousing, week 39, 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
24Wellboat visits in 2026by 4 different vessels · latest 11 Sep 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026
2Escapes reported1 salmon, August 2022Since 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
10.120.5Below the limit
20.090.5Below the limit
30.100.5Below the limit
40.100.5Below the limit
50.110.5Below the limit
60.110.5Below the limit
70.060.5Below the limit
80.050.5Below the limit
90.050.5Below the limit
100.060.5Below the limit
110.070.5Below the limit
120.070.5Below the limit
130.090.5Below the limit
140.120.5Below the limit
150.140.5Below the limit
160.130.2Below the limit
170.100.2Below the limit
180.080.2Below the limit
190.080.2Below the limit
200.030.2Below the limit
210.030.2Below the limit
220.030.5Below the limit
230.050.5Below the limit
240.090.5Below the limit
250.160.5Below the limit
260.160.5Below the limit
270.180.5Below the limit
280.230.5Below the limit
290.310.5Below the limit
300.380.5Below the limit
310.410.5Near the limit
320.420.5Near the limit
330.440.5Near the limit
340.250.5Below the limit
350.300.5Below the limit
360.320.5Below the limit
370.330.5Below the limit
380.180.5Below the limit
390.190.5Below the limit

Earlier years

20251 of 29 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
10.210.5Below the limit
20.210.5Below the limit
30.160.5Below the limit
40.170.5Below the limit
50.180.5Below the limit
60.170.5Below the limit
70.190.5Below the limit
80.140.5Below the limit
90.160.5Below the limit
100.180.5Below the limit
110.180.5Below the limit
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
380.010.5Below the limit
390.010.5Below the limit
400.020.5Below the limit
410.140.5Below the limit
420.420.5Near the limit
430.570.5Above the limit
440.320.5Below the limit
450.050.5Below the limit
460.040.5Below the limit
470.050.5Below the limit
480.050.5Below the limit
490.060.5Below the limit
500.110.5Below the limit
510.170.5Below the limit
520.130.5Below the limit
20241 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
Show as table
Adult female lice per fish per week, 2024
WeekAdult female lice per fishLice limitStatus
10.070.5Below the limit
20.060.5Below the limit
30.060.5Below the limit
40.050.5Below the limit
50.010.5Below the limit
60.040.5Below the limit
70.050.5Below the limit
80.040.5Below the limit
90.040.5Below the limit
100.050.5Below the limit
110.040.5Below the limit
120.050.5Below the limit
130.040.5Below the limit
140.040.5Below the limit
150.050.5Below the limit
160.050.2Below the limit
170.040.2Below the limit
180.060.2Below the limit
190.070.2Below the limit
200.080.2Below the limit
210.090.2Below the limit
220.110.5Below the limit
230.140.5Below the limit
240.160.5Below the limit
250.190.5Below the limit
260.210.5Below the limit
270.210.5Below the limit
280.250.5Below the limit
290.300.5Below the limit
300.400.5Near the limit
310.460.5Near the limit
320.400.5Near the limit
330.490.5Near the limit
340.430.5Near the limit
350.310.5Below the limit
360.390.5Below the limit
370.480.5Near the limit
380.730.5Above the limit
390.460.5Near the limit
400.230.5Below the limit
410.250.5Below the limit
420.330.5Below the limit
430.350.5Below the limit
440.300.5Below the limit
450.300.5Below the limit
460.270.5Below the limit
470.240.5Below the limit
480.230.5Below the limit
490.180.5Below the limit
500.180.5Below the limit
510.190.5Below the limit
520.210.5Below 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
400.000.5Below the limit
410.000.5Below the limit
420.000.5Below the limit
430.020.5Below the limit
440.060.5Below the limit
450.100.5Below the limit
460.130.5Below the limit
470.160.5Below the limit
480.130.5Below the limit
490.120.5Below the limit
500.090.5Below the limit
510.110.5Below the limit
520.080.5Below the limit

Treatments

Norwegian Food Safety Authority
  • Week 39, 2026
    Mechanical delousing1 pen
  • Week 38, 2026
    Mechanical delousing4 pens
  • Week 37, 2026
    Mechanical delousing2 pens
  • Week 36, 2026
    Mechanical delousing6 pens
Show all 32
  • Week 35, 2026
    Mechanical delousing2 pens
  • Week 34, 2026
    Mechanical delousing, Freshwater treatment, Thermal delousing6 pens
  • Week 33, 2026
    Mechanical delousing2 pens
  • Week 31, 2026
    Mechanical delousing4 pens
  • Week 30, 2026
    Mechanical delousing5 pens
  • Week 29, 2026
    Mechanical delousing3 pens
  • Week 28, 2026
    Mechanical delousing1 pen
  • Week 27, 2026
    Mechanical delousing2 pens
  • Week 26, 2026
    Mechanical delousing3 pens
  • Week 25, 2026
    Mechanical delousing2 pens
  • Week 20, 2026
    Mechanical delousing, Freshwater treatment6 pens
  • Week 19, 2026
    Freshwater treatment, Mechanical delousing2 pens
  • Week 17, 2026
    Mechanical delousing, Freshwater treatment4 pens
  • Week 16, 2026
    Mechanical delousing, Freshwater treatment6 pens
  • Week 8, 2026
    Mechanical delousing, Thermal delousing6 pens
  • Week 7, 2026
    Thermal delousing, Mechanical delousing8 pens
  • Week 1, 2026
    Freshwater treatment1 pen
  • Week 52, 2025
    Freshwater treatment2 pens
  • Week 51, 2025
    Freshwater treatment4 pens
  • Week 45, 2025
    Medicinal bath2 pens · Azamethiphos
  • Week 44, 2025
    Medicinal bath6 pens · Azamethiphos
  • Week 40, 2024
    Freshwater treatment, Mechanical delousing8 pens
  • Week 39, 2024
    Freshwater treatment, Mechanical delousing10 pens
  • Week 36, 2024
    Mechanical delousing3 pens
  • Week 35, 2024
    Mechanical delousing3 pens
  • Week 34, 2024
    Mechanical delousing2 pens
  • Week 32, 2024
    Freshwater treatment, Mechanical delousing6 pens
  • Week 31, 2024
    Mechanical delousing, Freshwater treatment2 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
  • 09 Aug 2022
    1 salmon escapedrecaptured 1 · Directorate of Fisheries
  • 23 Oct 2018
    1 salmon escapedCause: Håndtering · recaptured 1 · Directorate of Fisheries

Wellboat visits

24 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
11 Sep 2026KristiansundHausan1 h 21 min
10 Sep 2026KristiansundHausan2 h 18 min
07 Sep 2026KristiansundHausan2 h 19 min
04 Sep 2026KristiansundHausan9 h 11 min
22 Aug 2026Ro FjellHofsøya14 h 54 min
01 Aug 2026KristiansundEdøya II10 h 38 min
11 Jul 2026KristiansundKjørsvikgrunn disease or zone there8 h 9 min
05 Jul 2026KristiansundBadstuvika2 h 22 min
04 Jul 2026KristiansundBadstuvika15 h 6 min
20 Jun 2026KristiansundFugløya16 h 40 min
14 May 2026Froy HovdingKjørsvikgrunn3 h 2 min
13 May 2026Froy HovdingKjørsvikgrunn15 h 12 min
Show 53 older visits
ArrivalVesselPrevious farm (14 days)Duration
12 May 2026Froy HovdingKjørsvikgrunn12 h 11 min
11 May 2026Froy HovdingKjørsvikgrunn12 h 3 min
10 May 2026Froy HovdingKjørsvikgrunn15 h 45 min
26 Apr 2026Froy HovdingVassgåsholmen9 h 41 min
24 Apr 2026Froy HovdingVassgåsholmen8 h 28 min
17 Apr 2026Froy HovdingEdøya7 h 52 min
16 Apr 2026Froy HovdingEdøya5 h 28 min
16 Apr 2026Froy HovdingEdøya8 h 33 min
15 Apr 2026Froy HovdingEdøya17 h 31 min
04 Jan 2026Froey Vikingno other farm17 h 29 min
03 Jan 2026Froey Vikingno other farm19 h 56 min
02 Jan 2026Froey Vikingno other farm5 h 57 min
22 Dec 2025Froey VikingHalsbukta18 h 18 min
20 Dec 2025Froey VikingHalsbukta12 h 29 min
03 Nov 2025Froey VikingVassgåsholmen12 h 7 min
03 Nov 2025Froey VikingVassgåsholmen2 h 4 min
29 Oct 2025Froey VikingVassgåsholmen11 h 22 min
15 Oct 2025Smola VagVassgåsholmen3 h 25 min
31 Aug 2025Ronja AuroraVassgåsholmen3 h 22 min
29 Aug 2025Ronja AuroraSmælingen3 h 30 min
28 Aug 2025Ronja AuroraSmælingen4 h 0 min
23 Mar 2025Froey VikingHagahammaren4 h 26 min
09 Mar 2025Froey VikingHofsøya3 h 21 min
24 Feb 2025Froey VikingVassgåsholmen2 h 12 min
23 Feb 2025Froey VikingVassgåsholmen2 h 43 min
17 Feb 2025Froey VikingSjølsvik2 h 23 min
16 Feb 2025Froey VikingSjølsvik2 h 29 min
13 Feb 2025KristiansundVassgåsholmen2 h 13 min
27 Jan 2025KristiansundNord Leksa3 h 55 min
20 Jan 2025KristiansundSegelråa3 h 18 min
01 Jan 2025KristiansundUlvan4 h 18 min
17 Dec 2024KristiansundVassgåsholmen3 h 36 min
04 Dec 2024Froy HovdingHårkallbåen14 h 35 min
03 Dec 2024Froy HovdingHårkallbåen4 h 14 min
02 Dec 2024KristiansundUlvan1 h 41 min
01 Dec 2024Froy HovdingHårkallbåen5 h 10 min
11 Nov 2024KristiansundVassgåsholmen2 h 10 min
10 Nov 2024KristiansundVassgåsholmen3 h 17 min
10 Oct 2024KristiansundHausan3 h 18 min
05 Oct 2024Froy HovdingNord Leksa14 h 29 min
04 Oct 2024Froy HovdingNord Leksa3 h 4 min
03 Oct 2024Froy HovdingNord Leksa27 h 27 min
25 Sep 2024Froy HovdingVassgåsholmen8 h 0 min
24 Sep 2024Froy HovdingVassgåsholmen19 h 44 min
06 Sep 2024TonnyHendneset1 h 3 min
06 Sep 2024Froy HovdingOmsøyholman15 h 59 min
05 Sep 2024Froy HovdingOmsøyholman16 h 36 min
04 Sep 2024Froy HovdingOmsøyholman13 h 34 min
28 Aug 2024Froy HovdingGunnarøya22 h 10 min
27 Aug 2024Froy HovdingGunnarøya10 h 37 min
24 Aug 2024KristiansundSandholmane10 h 31 min
07 Aug 2024Froy HovdingVassgåsholmen15 h 48 min
04 Aug 2024Froy HovdingVassgåsholmen12 h 31 min

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

Licences

Site MAB: 7,020 tonnes
LicenceTypeCapacityHolder
ST F 0003Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST F 0022Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST F 0023Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST F 0030Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST F 0031Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST H 0002Kommersiell / matfiskSalmon, Rainbow trout, Trout805 tLerøy Midt Sjø AS
ST H 0003Kommersiell / matfiskSalmon, Rainbow trout, Trout805 tLerøy Midt Sjø AS
ST H 0056Visning / matfiskSalmon, Rainbow trout, Trout780 tLerøy Midt AS
ST SI 0001Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST SI 0012Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS
ST SI 0013Kommersiell / matfiskSalmon, Rainbow trout, Trout788 tLerøy Midt Sjø AS

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