Kattholmen

Site 12872 · Kristiansund municipality · Production area 6, Nordmøre og Sør-Trøndelag

Below the lice limit, week 39Operated by Måsøval Lisens AS · group Måsøval

Broodstock site: the limit may differ from the general one.

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 4 weeks with a count · broodstock: limit may differCalculated 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

3Wellboat visits in 2026by 2 different vessels · latest 05 Sep 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported6 salmon, August 2018Since 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. Broodstock site: the limit may differ from the general one.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026Broodstock site: the limit may differ from the general one.

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Adult female lice per fish per week, 2026
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	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.00	0.5	Below the limit

Earlier years

20254 of 43 weeks with a count above the limit

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Adult female lice per fish per week, 2025
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	0.05	0.5	Below the limit
4	0.02	0.5	Below the limit
5	0.03	0.5	Below the limit
6	0.06	0.5	Below the limit
7	0.14	0.5	Below the limit
8	0.13	0.5	Below the limit
9	0.19	0.5	Below the limit
10	0.16	0.5	Below the limit
11	0.13	0.5	Below the limit
12	0.14	0.5	Below the limit
13	0.18	0.5	Below the limit
14	0.14	0.5	Below the limit
15	0.14	0.5	Below the limit
16	0.17	0.2	Near the limit
17	0.08	0.2	Below the limit
18	0.19	0.2	Near the limit
19	0.16	0.2	Below the limit
20	0.28	0.2	Above the limit
21	0.16	0.2	Below the limit
22	0.16	0.5	Below the limit
23	0.35	0.5	Below the limit
24	0.28	0.5	Below the limit
25	0.38	0.5	Below the limit
26	0.48	0.5	Near the limit
27	0.28	0.5	Below the limit
28	0.06	0.5	Below the limit
29	0.08	0.5	Below the limit
30	0.15	0.5	Below the limit
31	0.34	0.5	Below the limit
32	0.25	0.5	Below the limit
33	0.28	0.5	Below the limit
34	1.70	0.5	Above the limit
35	2.34	0.5	Above the limit
36	1.43	0.5	Above the limit
37	0.25	0.5	Below the limit
38	0.27	0.5	Below the limit
39	0.48	0.5	Near the limit
40	0.25	0.5	Below the limit
41	0.36	0.5	Below the limit
42	0.33	0.5	Below the limit
43	0.48	0.5	Near the limit
44	unknown	0.5	Reported without a count
45	unknown	0.5	Reported without a count
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

20240 of 31 weeks with a count above the limit

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Adult female lice per fish per week, 2024
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	0.00	0.5	Below the limit
23	0.00	0.5	Below the limit
24	0.00	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.00	0.5	Below the limit
27	0.00	0.5	Below the limit
28	0.00	0.5	Below the limit
29	0.03	0.5	Below the limit
30	0.03	0.5	Below the limit
31	0.05	0.5	Below the limit
32	0.05	0.5	Below the limit
33	0.00	0.5	Below the limit
34	0.03	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.01	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	0.01	0.5	Below the limit
45	0.01	0.5	Below the limit
46	0.00	0.5	Below the limit
47	0.01	0.5	Below the limit
48	0.00	0.5	Below the limit
49	0.02	0.5	Below the limit
50	0.02	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.01	0.5	Below the limit

20230 of 9 weeks with a count above the limit (data from week 40)

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Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.28	0.5	Below the limit
41	0.46	0.5	Near the limit
42	0.29	0.5	Below the limit
43	0.31	0.5	Below the limit
44	0.43	0.5	Near the limit
45	0.33	0.5	Below the limit
46	0.44	0.5	Near the limit
47	0.46	0.5	Near the limit
48	0.42	0.5	Near the limit
49	unknown	0.5	Reported without a count
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

Treatments

Norwegian Food Safety Authority

Week 40, 2025
Mechanical delousing4 pens
Week 37, 2025
Mechanical delousing3 pens
Week 35, 2025
Thermal delousing3 pens
Week 32, 2025
Mechanical delousingWhole site

Show all 11

Week 31, 2025
Mechanical delousing1 pen
Week 28, 2025
Freshwater treatment, Thermal delousing2 pens
Week 27, 2025
Thermal delousing, Freshwater treatment6 pens
Week 22, 2025
Mechanical delousing4 pens
Week 17, 2025
Other treatment4 pens · Flatsetsundspyler
Week 45, 2023
Other treatment2 pens · Flatsetsundspyler
Week 42, 2023
Other treatment5 pens · Flatsetsundspyler

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

27 Aug 2018
6 salmon escapedCause: Menneskelig svikt da mannskapet forklarte at de hadde satt trykk på lasterommet før de hadde åpnet bunnventiler. · Directorate of Fisheries

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
05 Sep 2026	Ro Spirit	Lavika	37 min
03 Sep 2026	Ro Spirit	Lavika	32 min
02 Sep 2026	Smola Vag	Skjervøy	4 h 9 min
30 Aug 2025	Njord Kya	Ulvan	45 h 37 min
31 Jul 2025	Njord Kya	Gaustad	2 h 32 min
30 Jul 2025	Njord Kya	Gaustad	17 h 15 min
06 Jul 2025	Njord Kya	Gaustad	17 h 33 min
05 Jul 2025	Njord Kya	Gaustad	23 h 21 min
04 Jul 2025	Njord Kya	Gaustad	22 h 27 min
27 May 2025	Njord Kya	Ulvan	31 h 39 min
26 May 2025	Njord Kya	Hogsnes	3 h 52 min
25 May 2025	Njord Kya	Gaustad	1 h 46 min

Show 11 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
11 May 2025	Njord Kya	Or	2 h 51 min
25 Apr 2025	Njord Kya	Ulvan	10 h 16 min
26 Nov 2024	Neptun	Gjerde	6 h 7 min
07 Nov 2024	Froey Viking	Omsøyholman	2 h 0 min
05 Nov 2024	Froey Viking	Omsøyholman	24 h 30 min
05 Nov 2024	Froey Viking	Omsøyholman	9 h 57 min
04 Nov 2024	Froey Viking	Omsøyholman	20 h 36 min
01 Sep 2024	Viknatrans	Gaustad	46 min
01 Sep 2024	Viknatrans	Gaustad	1 h 34 min
29 Aug 2024	Viknatrans	Or	1 h 8 min
01 Jun 2024	Viknatrans	Årsetfjorden	3 h 2 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.

Company	From	To
Måsøval AS	Week 40, 2023	Week 2, 2025
Måsøval Lisens AS	Week 3, 2025	Week 39, 2026

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

Licences

Site MAB: 3,120 tonnes

Licence	Type	Capacity	Holder
M FI 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
M TV 0009	Kommersiell / stamfiskSalmon, Rainbow trout, Trout	780 t	Aquagen AS
ST F 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
ST F 0062	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
ST HE 0005	Kommersiell / stamfiskSalmon, Rainbow trout	780 t	Aquagen AS
ST HE 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
ST HE 0019	Kommersiell / stamfiskSalmon, Rainbow trout	780 t	Aquagen AS

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