Municipality · Trøndelag · 5020

Osen

5 registered sites for salmon and trout, operated by 4 companies. The farms are in production area 6 (Nordmøre og Sør-Trøndelag), rated yellow (2026 assessment).

Follow Osen

0 of 3Farms above the lice limit, week 39Norwegian Food Safety Authority · Week 39, 2026
0.0%Of lice counts above the limit, 202562 counts · Norwegian Food Safety Authority
2Sea lice treatments, 2025Norwegian Food Safety Authority · 01 Oct 2026
0Open disease cases nowNorwegian Food Safety Authority · 01 Oct 2026
0Escapes reported, 2025Directorate of Fisheries · 01 Oct 2026
NOK 4.5 mFrom the Aquaculture Fund, 2025Directorate of Fisheries (Aquaculture Fund) · 30 Sep 2026

Capacity per company in the municipality

Sites' maximum allowed biomass (MAB) in tonnes, summed per operator · total 18,720 tonnes · 1 sites without a stated capacity · Source: Directorate of Fisheries · updated 01 Oct 2026

Latest events

Atom feed

Food Safety Authority, Directorate of Fisheries, Coastal Administration (AIS) · the same events as in the alerts

Farms in Osen

Farm	Status week 39	Lice	MTB	Wellboat visits, 30 d
Indre Skjervøy Mowi Seawater Norway AS	Near the limit	0.48	7,020	5
Nausttaren Bjørøya AS	Below the limit	0.35	3,120	2
Breidvika Mowi Seawater Norway AS	Below the limit	0.15	5,460	2
Nordre Skokkeløy Måsøval Lisens AS	Not reported	unknown	3,120	0
Sætran Setran Settefisk AS	Not reported	unknown	unknown	0

Lice: adult female lice per fish, Week 39, 2026 (▲ above, ◆ near, ● below the limit, ○ unknown) · Food Safety Authority · Wellboat visits: 30 days to 12 Sep 2026, Coastal Administration (AIS) · MAB: allowed biomass in tonnes, Directorate of Fisheries

By year

Year	Farms reporting	Above limit	Treatments	Disease cases	Aquaculture Fund	Wild salmon caught
2026 (to date)	3	0.9%	36	0	unknown	unknown
2025	3	0.0%	2	0	NOK 4.5 m	726
2024	3	8.6%	22	0*	NOK 19 m	243
2023	2*	0.0%*	0*	unknown	NOK 5.2 m	382
2022	unknown	unknown	unknown	unknown	NOK 13.9 m	505
2021	unknown	unknown	unknown	unknown	NOK 3.4 m	516
2020	unknown	unknown	unknown	unknown	NOK 10.7 m	439
2019	unknown	unknown	unknown	unknown	NOK 6 m	572

* Partial year: lice counts from the Food Safety Authority from week 40 of 2023; disease register from 26 Nov 2024 (older cases only if still open then). The Aquaculture Fund publishes yearly around October–December. Wild salmon: reported catch in rivers with their mouth in the municipality (Statistics Norway). Unknown = no data, not zero.

Salmon rivers

Steinsdalselva (Osen)137.2Z

Reported wild salmon catch 2025: 726 salmon (1,308 kg).

Norwegian Environment Agency, Directorate of Fisheries · catch: Statistics Norway