Risholmen

Site 12832 · Lillesand municipality · Production area 1, Svenskegrensen til Jæren

Status unknown: not reported in week 39Operated by Hellesund Fiskeoppdrett AS · group unknown

unknownAdult female lice per fishNo count in week 39. Latest: 0.40 in week 35, 2025Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

unknownWeeks above the limit in 2026No weeks with a count in 2026Calculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

unknownLice treatments in 2026No lice reports in 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

0Wellboat visits in 2026Latest visit 06 Sep 2025Derived 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.

2025

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
Week	Adult female lice per fish	Lice limit	Status
1	0.00	0.5	Below the limit
2	0.00	0.5	Below the limit
3	0.00	0.5	Below the limit
4	0.02	0.5	Below the limit
5	0.02	0.5	Below the limit
6	0.20	0.5	Below the limit
7	0.18	0.5	Below the limit
8	unknown	0.5	Reported without a count
9	unknown	0.5	Reported without a count
10	0.30	0.5	Below the limit
11	0.40	0.5	Near the limit
12	0.50	0.5	Above the limit
13	1.00	0.5	Above the limit
14	0.14	0.5	Below the limit
15	0.09	0.5	Below the limit
16	0.08	0.2	Below the limit
17	0.08	0.2	Below the limit
18	0.12	0.2	Below the limit
19	0.15	0.2	Below the limit
20	0.15	0.2	Below the limit
21	0.18	0.2	Near the limit
22	0.05	0.5	Below the limit
23	0.01	0.5	Below the limit
24	0.01	0.5	Below the limit
25	0.01	0.5	Below the limit
26	0.00	0.5	Below the limit
27	0.00	0.5	Below the limit
28	0.10	0.5	Below the limit
29	0.15	0.5	Below the limit
30	unknown	0.5	Reported without a count
31	unknown	0.5	Reported without a count
32	0.25	0.5	Below the limit
33	0.30	0.5	Below the limit
34	0.40	0.5	Near the limit
35	0.40	0.5	Near the limit
36	unknown	0.5	Not reported
37	unknown	0.5	Not reported
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported
40	unknown	0.5	Not reported
41	unknown	0.5	Not reported
42	unknown	0.5	Not reported
43	unknown	0.5	Not reported
44	unknown	0.5	Not reported
45	unknown	0.5	Not reported
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

Earlier years

20240 of 19 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
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	0.00	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.02	0.5	Below the limit
38	0.02	0.5	Below the limit
39	0.07	0.5	Below the limit
40	0.05	0.5	Below the limit
41	0.05	0.5	Below the limit
42	0.10	0.5	Below the limit
43	0.00	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.00	0.5	Below the limit
47	0.05	0.5	Below the limit
48	0.02	0.5	Below the limit
49	0.00	0.5	Below the limit
50	0.00	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.00	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 21, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 20, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 14, 2025
Other treatmentWhole site · Bruk av Salmosan i brønnbåt · Med Salmosan i brønnbåt

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

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
06 Sep 2025	Norwegian Gannet	Auenes	4 h 53 min
26 May 2025	Rostein	Revøy	3 h 2 min
31 Mar 2025	Robas	Auenes	2 h 25 min
31 Mar 2025	Robas	Eikebærånæ	3 h 0 min
12 Aug 2024	Mowi Star	Eikebærånæ	2 h 44 min

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

Licences

Site MAB: 585 tonnes

Licence	Type	Capacity	Holder
AA L 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Hellesund Fiskeoppdrett AS
AA L 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	804 t	Sørvest Laks AS

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