Average number of lice per fish on BC salmon farms

These graphs show the average number of sea lice (L.salmonis) per fish, by aquaculture reporting areas, at marine finfish aquaculture facilities in BC. Sea Lice counts are reported by industry and audited by Fisheries and Oceans Canada (DFO).

Sea lice occur naturally in the marine environment and their abundance is influenced by seasonal and year-to-year variations in ocean salinity, temperature and other environmental conditions. DFO’s Conditions of Licence for aquaculture require strict ongoing inspection of farmed fish to monitor sea lice levels and implementation of management measures so that sea lice numbers are at their lowest during the outmigration of wild juvenile salmon, from March 1 to June 30 of each year.

In autumn, adult wild salmon return to their spawning grounds. These fish carry high numbers of sea lice, which can infect farmed salmon. For this reason, sea lice abundance on farmed salmon peaks seasonally from late summer to early fall. During the remainder of the year, licence holders must monitor and report to DFO when levels reach the three motile threshold; detailed industry sea lice reports and DFO audit results are available.

Sunshine Coast

Long text version

Sea lice abundance at BC salmon farms on the Sunshine Coast, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023
230201February 2023			0.2
230301March 2023	3	0.2
230401April 2023	3	0.1
230501May 2023	3
230601June 2023	3
230701July 2023			0.5
230801August 2023			0.5
220101January 2022	0.6
220201February 2022	0.8
220301March 2022	3	1.2
220401April 2022	3	1.2
220501May 2022	3	0.8
220601June 2022	3	0.7
220701July 2022			0.5
220801August 2022			0.5
220901September 2022			0.6
221001October 2022			0.5
221101November 2022
221201December 2022			0.3
210101January 2021			2.2
210201February 2021			1.5
210301March 2021	3	2.4
210401April 2021	3
210501May 2021	3	0.3
210601June 2021	3	0.1
210701July 2021			0.1
210801August 2021			0.2
210901September 2021			2.4
211001October 2021			4.9
211101November 2021			0.4
211201December 2021			1.0
200101January 2020			2.6
200201February 2020			1.7
200301March 2020	3	0.4
200401April 2020	3	0.4
200501May 2020	3	1.3
200601June 2020	3	1.6
200701July 2020			0.8
200801August 2020			0.7
200901September 2020			0.9
201001October 2020
201101November 2020
201201December 2020
190101January 2019			0.3
190201February 2019
190301March 2019	3	0.5
190401April 2019	3	0.1
190501May 2019	3	0.1
190601June 2019	3	0.4
190701July 2019			0.1
190801August 2019			0.1
190901September 2019			0.4
191001October 2019			0.9
191101November 2019			2.1
191201December 2019			3.6
180101January 2018			1.7
180201February 2018			0.9
180301March 2018	3	0.3
180401April 2018	3	0.2
180501May 2018	3	0.1
180601June 2018	3	0.1
180701July 2018			0.2
180801August 2018			0.2
180901September 2018			0.3
181001October 2018			0.6
181101November 2018			0.1
181201December 2018
170101January 2017			5.3
170201February 2017			4.3
170301March 2017	3	2.0
170401April 2017	3	2.0
170501May 2017	3	0.3
170601June 2017	3	0.2
170701July 2017			0.1
170801August 2017			0.1
170901September 2017			0.2
171001October 2017			0.4
171101November 2017			0.6
171201December 2017			0.8
160101January 2016			2.1
160201February 2016			1.4
160301March 2016	3	0.6
160401April 2016	3	0.5
160501May 2016	3	1.3
160601June 2016	3	2.4
160701July 2016			0.4
160801August 2016			0.1
160901September 2016			0.4
161001October 2016			0.2
161101November 2016			0.9
161201December 2016			0.6
150101January 2015			0.2
150201February 2015			0.1
150301March 2015	3	0.1
150401April 2015	3	0.1
150501May 2015	3	0.1
150601June 2015	3	0.1
150701July 2015			0.2
150801August 2015			3.7
150901September 2015			7.2
151001October 2015			3.4
151101November 2015			0.6
151201December 2015			1.1
140101January 2014			0.3
140201February 2014			0.0
140301March 2014	3	0.3
140401April 2014	3	0.2
140501May 2014	3	0.1
140601June 2014	3	0.0
140701July 2014
140801August 2014
140901September 2014			0.0
141001October 2014			0.0
141101November 2014			0.1
141201December 2014			0.1
130101January 2013
130201February 2013
130301March 2013	3	1.5
130401April 2013	3	0.0
130501May 2013	3
130601June 2013	3
130701July 2013
130801August 2013
130901September 2013
131001October 2013			0.1
131101November 2013			0.1
131201December 2013			0.3
120101January 2012			0.1
120201February 2012			0.1
120301March 2012	3	0.1
120401April 2012	3	0.2
120501May 2012	3	0.3
120601June 2012	3
120701July 2012			0.2
120801August 2012
120901September 2012
121001October 2012
121101November 2012
121201December 2012
110101January 2011			0.8
110201February 2011			0.6
110301March 2011	3	0.3
110401April 2011	3	0.4
110501May 2011	3	0.1
110601June 2011	3	0.0
110701July 2011			0.0
110801August 2011			0.1
110901September 2011			0.0
111001October 2011			0.1
111101November 2011			0.1
111101December 2011			0.2

Discovery Islands

Long text version

Sea lice abundance at BC salmon farms in the Discovery Islands, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			0.8
230201February 2023			0.9
230301March 2023	3	1.2
230401April 2023	3	1.4
230501May 2023	3	1.1
230601June 2023	3	2.4
230701July 2023			2.8
230801August 2023
220101January 2022			5.0
220201February 2022			3.6
220301March 2022	3	1.3
220401April 2022	3	0.8
220501May 2022	3	1.6
220601June 2022	3	1.6
220701July 2022			1.9
220801August 2022			5.3
220901September 2022			7.5
221001October 2022			4.6
221101November 2022			2.1
221201December 2022			2.0
210101January 2021			2.7
210201February 2021			1.7
210301March 2021	3	1.5
210401April 2021	3	0.8
210501May 2021	3	1.6
210601June 2021	3	1.0
210701July 2021			2.0
210801August 2021			4.0
210901September 2021			6.9
211001October 2021			3.7
211101November 2021			6.3
211201December 2021			6.3
200101January 2020			1.7
200201February 2020			2.4
200301March 2020	3	2.2
200401April 2020	3	1.9
200501May 2020	3	1.1
200601June 2020	3	1.9
200701July 2020			1.9
200801August 2020			4.4
200901September 2020			4.3
201001October 2020			3.8
201101November 2020			4.1
201201December 2020			4.3
190101January 2019			1.9
190201February 2019			2.1
190301March 2019	3	1.7
190401April 2019	3	1.5
190501May 2019	3	0.8
190601June 2019	3	1.1
190701July 2019			1.3
190801August 2019			1.7
190901September 2019			3.8
191001October 2019			4.2
191101November 2019			3.2
191201December 2019			2.4
180101January 2018			0.2
180201February 2018			0.1
180301March 2018	3	0.2
180401April 2018	3	0.4
180501May 2018	3	0.2
180601June 2018	3	0.3
180701July 2018			0.5
180801August 2018			1.2
180901September 2018			2.9
181001October 2018			2.7
181101November 2018			2.0
181201December 2018			2.2
170101January 2017			4.2
170201February 2017			0.5
170301March 2017	3	0.3
170401April 2017	3	0.5
170501May 2017	3	0.7
170601June 2017	3	0.9
170701July 2017			1.2
170801August 2017			1.1
170901September 2017			1.4
171001October 2017			4.4
171101November 2017			6.0
171201December 2017			1.7
160101January 2016			0.8
160201February 2016			1.1
160301March 2016	3	1.0
160401April 2016	3	1.3
160501May 2016	3	0.8
160601June 2016	3	0.8
160701July 2016			0.7
160801August 2016			0.7
160901September 2016			0.7
161001October 2016			1.6
161101November 2016			5.7
161201December 2016			6.5
150101January 2015			2.0
150201February 2015			1.5
150301March 2015	3	2.9
150401April 2015	3	2.8
150501May 2015	3	1.1
150601June 2015	3	0.8
150701July 2015			0.9
150801August 2015			1.2
150901September 2015			2.2
151001October 2015			3.2
151101November 2015			2.9
151201December 2015			0.9
140101January 2014			1.7
140201February 2014			1.6
140301March 2014	3	1.0
140401April 2014	3	0.6
140501May 2014	3	0.7
140601June 2014	3	1.3
140701July 2014			2.0
140801August 2014			0.8
140901September 2014			3.6
141001October 2014			1.5
141101November 2014			2.4
141201December 2014			3.9
130101January 2013			4.4
130201February 2013			1.1
130301March 2013	3	0.4
130401April 2013	3	0.3
130501May 2013	3	0.2
130601June 2013	3	0.2
130701July 2013			2.0
130801August 2013			0.6
130901September 2013			0.6
131001October 2013			2.5
131101November 2013			3.4
131201December 2013			1.8
120101January 2012			1.3
120201February 2012			1.7
120301March 2012	3	1.3
120401April 2012	3	2.2
120501May 2012	3	1.5
120601June 2012	3
120701July 2012			0.5
120801August 2012			0.5
120901September 2012			2.2
121001October 2012			3.1
121101November 2012			4.7
121201December 2012			3.2
110101January 2011			1.1
110201February 2011			0.4
110301March 2011	3	0.5
110401April 2011	3	0.5
110501May 2011	3	0.7
110601June 2011	3	1.2
110701July 2011			0.8
110801August 2011			2.2
110901September 2011			1.8
111001October 2011			1.2
111101November 2011			1.1
111101December 2011			1.8

Broughton Archipelago

Long text version

Sea lice abundance at BC salmon farms in the Broughton Archipelago, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			1.2
230201February 2023			0.6
230301March 2023	3	0.6
230401April 2023	3	0.8
230501May 2023	3	0.9
230601June 2023	3	1.6
230701July 2023			1.9
230801August 2023
220101January 2022			1.2
220201February 2022			1.4
220301March 2022	3	0.8
220401April 2022	3	0.5
220501May 2022	3	0.5
220601June 2022	3	0.8
220701July 2022			0.9
220801August 2022			0.8
220901September 2022			0.6
221001October 2022			0.5
221101November 2022			0.6
221201December 2022			0.8
210101January 2021			1.4
210201February 2021			1.2
210301March 2021	3	0.7
210401April 2021	3	0.7
210501May 2021	3	0.8
210601June 2021	3	1.1
210701July 2021			1.1
210801August 2021			1.3
210901September 2021			1.6
211001October 2021			1.1
211101November 2021			1.1
211201December 2021			1.1
200101January 2020			0.7
200201February 2020			0.7
200301March 2020	3	0.3
200401April 2020	3	0.2
200501May 2020	3	0.1
200601June 2020	3	0.2
200701July 2020			0.4
200801August 2020			0.7
200901September 2020			0.3
201001October 2020			0.5
201101November 2020			0.7
201201December 2020			0.9
190101January 2019			0.8
190201February 2019			0.7
190301March 2019	3	0.6
190401April 2019	3	0.6
190501May 2019	3	0.6
190601June 2019	3	0.3
190701July 2019			0.2
190801August 2019			0.4
190901September 2019			1.3
191001October 2019			0.9
191101November 2019			0.8
191201December 2019			0.8
180101January 2018			1.1
180201February 2018			0.9
180301March 2018	3	0.5
180401April 2018	3	0.3
180501May 2018	3	0.3
180601June 2018	3	0.2
180701July 2018			0.2
180801August 2018			0.3
180901September 2018			0.4
181001October 2018			0.5
181101November 2018			0.7
181201December 2018			0.8
170101January 2017			3.5
170201February 2017			1.5
170301March 2017	3	0.3
170401April 2017	3	0.2
170501May 2017	3	0.2
170601June 2017	3	0.4
170701July 2017			0.4
170801August 2017			0.7
170901September 2017			1.1
171001October 2017			1.5
171101November 2017			1.3
171201December 2017			1.3
160101January 2016			2.0
160201February 2016			2.0
160301March 2016	3	0.8
160401April 2016	3	0.4
160501May 2016	3	0.3
160601June 2016	3	0.2
160701July 2016			0.4
160801August 2016			1.0
160901September 2016			1.2
161001October 2016			1.1
161101November 2016			2.0
161201December 2016			2.7
150101January 2015			4.3
150201February 2015			3.8
150301March 2015	3	2.1
150401April 2015	3	1.6
150501May 2015	3	1.0
150601June 2015	3	1.1
150701July 2015			0.4
150801August 2015			0.4
150901September 2015			0.5
151001October 2015			1.3
151101November 2015			1.6
151201December 2015			1.4
140101January 2014			2.4
140201February 2014			0.8
140301March 2014	3	0.6
140401April 2014	3	0.9
140501May 2014	3	0.3
140601June 2014	3	0.2
140701July 2014			0.2
140801August 2014			0.9
140901September 2014			2.5
141001October 2014			5.9
141101November 2014			3.4
141201December 2014			2.6
130101January 2013			1.6
130201February 2013			1.0
130301March 2013	3	0.5
130401April 2013	3	0.4
130501May 2013	3	0.3
130601June 2013	3	0.3
130701July 2013			0.2
130801August 2013			0.4
130901September 2013			2.3
131001October 2013			5.0
131101November 2013			3.1
131201December 2013			2.3
120101January 2012			1.6
120201February 2012			0.5
120301March 2012	3	0.3
120401April 2012	3	0.4
120501May 2012	3	0.5
120601June 2012	3	0.8
120701July 2012			0.5
120801August 2012			0.3
120901September 2012			1.1
121001October 2012			0.7
121101November 2012			1.8
121201December 2012			3.0
110101January 2011			1.0
110201February 2011			0.2
110301March 2011	3	0.1
110401April 2011	3	0.2
110501May 2011	3	0.2
110601June 2011	3	0.3
110701July 2011			0.3
110801August 2011			0.4
110901September 2011			1.5
111001October 2011			2.0
111101November 2011			1.9
111101December 2011			2.0

Port Hardy

Long text version

Sea lice abundance at BC salmon farms in the Port Hardy area, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			1.1
230201February 2023			1.0
230301March 2023	3	1.4
230401April 2023	3	1.2
230501May 2023	3	0.7
230601June 2023	3	0.8
230701July 2023			2.6
230801August 2023
220101January 2022			1.7
220201February 2022			1.9
220301March 2022	3	1.0
220401April 2022	3	1.0
220501May 2022	3	0.6
220601June 2022	3	1.1
220701July 2022			2.3
220801August 2022			4.6
220901September 2022			3.8
221001October 2022			1.7
221101November 2022			1.6
221201December 2022			1.2
210101January 2021			1.8
210201February 2021			1.7
210301March 2021	3	2.2
210401April 2021	3	2.5
210501May 2021	3	1.4
210601June 2021	3	1.4
210701July 2021			2.4
210801August 2021			5.4
210901September 2021			8.1
211001October 2021			7.6
211101November 2021			4.6
211201December 2021			2.2
200101January 2020			1.1
200201February 2020			1.5
200301March 2020	3	0.9
200401April 2020	3	0.5
200501May 2020	3	0.7
200601June 2020	3	0.9
200701July 2020			1.7
200801August 2020			5.4
200901September 2020			4.0
201001October 2020			2.6
201101November 2020			2.0
201201December 2020			2.6
190101January 2019			0.7
190201February 2019			1.1
190301March 2019	3	0.4
190401April 2019	3	0.7
190501May 2019	3	0.8
190601June 2019	3	0.7
190701July 2019			1.0
190801August 2019			1.8
190901September 2019			3.0
191001October 2019			3.2
191101November 2019			1.3
191201December 2019			0.5
180101January 2018			0.5
180201February 2018			0.2
180301March 2018	3	0.3
180401April 2018	3	0.4
180501May 2018	3	0.5
180601June 2018	3	0.9
180701July 2018			2.0
180801August 2018			3.0
180901September 2018			1.7
181001October 2018			1.3
181101November 2018			1.1
181201December 2018			0.8
170101January 2017			3.0
170201February 2017			3.2
170301March 2017	3	1.9
170401April 2017	3	0.4
170501May 2017	3	0.3
170601June 2017	3	0.3
170701July 2017			0.6
170801August 2017			2.0
170901September 2017			4.4
171001October 2017			2.6
171101November 2017			1.0
171201December 2017			0.7
160101January 2016			0.5
160201February 2016			1.0
160301March 2016	3	1.7
160401April 2016	3	1.7
160501May 2016	3	1.5
160601June 2016	3	1.4
160701July 2016			1.5
160801August 2016			0.9
160901September 2016			1.5
161001October 2016			1.5
161101November 2016			2.1
161201December 2016			1.2
150101January 2015			2.3
150201February 2015			1.8
150301March 2015	3	1.5
150401April 2015	3	4.0
150501May 2015	3	3.0
150601June 2015	3	2.0
150701July 2015			1.5
150801August 2015			1.0
150901September 2015			2.4
151001October 2015			4.0
151101November 2015			0.8
151201December 2015			0.8
140101January 2014			0.2
140201February 2014			0.0
140301March 2014	3	0.1
140401April 2014	3	0.1
140501May 2014	3	0.2
140601June 2014	3	0.4
140701July 2014			0.7
140801August 2014			2.9
140901September 2014			6.5
141001October 2014			7.3
141101November 2014			2.6
141201December 2014			6.1
130101January 2013			0.3
130201February 2013			0.6
130301March 2013	3	0.6
130401April 2013	3	0.9
130501May 2013	3	0.9
130601June 2013	3	0.6
130701July 2013			0.8
130801August 2013			1.9
130901September 2013			3.7
131001October 2013			7.4
131101November 2013			4.9
131201December 2013			0.9
120101January 2012			1.3
120201February 2012			0.7
120301March 2012	3	0.7
120401April 2012	3	1.6
120501May 2012	3	0.3
120601June 2012	3
120701July 2012			2.0
120801August 2012			3.5
120901September 2012			5.0
121001October 2012			4.1
121101November 2012			2.7
121201December 2012			0.2
110101January 2011			1.4
110201February 2011			0.0
110301March 2011	3	0.4
110401April 2011	3	0.2
110501May 2011	3	0.3
110601June 2011	3	0.6
110701July 2011			0.9
110801August 2011			2.3
110901September 2011			1.9
111001October 2011			3.7
111101November 2011			2.5
111101December 2011			2.0

Esperanza Inlet

Long text version

Sea lice abundance at BC salmon farms in the Esperanza Inlet area, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			0.4
230201February 2023			1.0
230301March 2023	3	0.6
230401April 2023	3	0.9
230501May 2023	3	1.2
230601June 2023	3	2.1
230701July 2023			7.3
230801August 2023
220101January 2022			0.0
220201February 2022			0.0
220301March 2022	3	0.1
220401April 2022	3	0.2
220501May 2022	3	0.1
220601June 2022	3	0.2
220701July 2022			1.0
220801August 2022			4.5
220901September 2022			2.6
221001October 2022			1.6
221101November 2022			1.5
221201December 2022			1.2
210101January 2021			0.7
210201February 2021			0.6
210301March 2021	3	1.1
210401April 2021	3	0.9
210501May 2021	3	2.0
210601June 2021	3	1.3
210701July 2021
210801August 2021
210901September 2021
211001October 2021
211101November 2021			0.0
211201December 2021			0.0
200101January 2020			0.0
200201February 2020			0.0
200301March 2020	3	0.1
200401April 2020	3	0.1
200501May 2020	3	0.6
200601June 2020	3	1.8
200701July 2020			2.0
200801August 2020			7.0
200901September 2020			11.7
201001October 2020			5.4
201101November 2020			0.9
201201December 2020			1.2
190101January 2019			1.4
190201February 2019			1.5
190301March 2019	3	3.1
190401April 2019	3	3.6
190501May 2019	3	14.4
190601June 2019	3	2.8
190701July 2019			1.9
190801August 2019			4.1
190901September 2019			6.0
191001October 2019			10.3
191101November 2019			0.1
191201December 2019			0.0
180101January 2018			0.0
180201February 2018			0.0
180301March 2018	3	0.0
180401April 2018	3	0.1
180501May 2018	3	0.2
180601June 2018	3	1.4
180701July 2018			11.2
180801August 2018			40.2
180901September 2018			25.5
181001October 2018			10.3
181101November 2018			1.5
181201December 2018			3.3
170101January 2017			28.9
170201February 2017			42.8
170301March 2017	3	36.6
170401April 2017	3	9.4
170501May 2017	3	8.4
170601June 2017	3	9.8
170701July 2017
170801August 2017
170901September 2017
171001October 2017
171101November 2017			0.0
171201December 2017			0.0
160101January 2016			0.1
160201February 2016			0.0
160301March 2016	3	0.1
160401April 2016	3	0.1
160501May 2016	3	0.1
160601June 2016	3	0.5
160701July 2016			2.8
160801August 2016
160901September 2016			16.1
161001October 2016			15.5
161101November 2016			11.3
161201December 2016			14.3
150101January 2015			0.2
150201February 2015			0.0
150301March 2015	3	0.1
150401April 2015	3	0.0
150501May 2015	3	0.0
150601June 2015	3	1.0
150701July 2015			1.7
150801August 2015
150901September 2015
151001October 2015			0.1
151101November 2015			0.4
151201December 2015			0.1
140101January 2014			0.0
140201February 2014			0.0
140301March 2014	3	0.0
140401April 2014	3	0.0
140501May 2014	3	0.0
140601June 2014	3	0.1
140701July 2014			1.8
140801August 2014			1.9
140901September 2014			0.4
141001October 2014			0.7
141101November 2014			0.5
141201December 2014			0.5
130101January 2013
130201February 2013
130301March 2013	3
130401April 2013	3
130501May 2013	3
130601June 2013	3
130701July 2013
130801August 2013
130901September 2013
131001October 2013
131101November 2013
131201December 2013			0.0
120101January 2012
120201February 2012
120301March 2012	3
120401April 2012	3
120501May 2012	3
120601June 2012	3
120701July 2012
120801August 2012
120901September 2012
121001October 2012
121101November 2012
121201December 2012
110101January 2011			0.4
110201February 2011			0.6
110301March 2011	3	1.1
110401April 2011	3	0.4
110501May 2011	3	0.7
110601June 2011	3	1.7
110701July 2011
110801August 2011			12.9
110901September 2011
111001October 2011
111101November 2011
111101December 2011

Central Coast

Long text version

Sea lice abundance at BC salmon farms in the Central Coast area, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			1.3
230201February 2023			0.9
230301March 2023	3	0.6
230401April 2023	3	0.6
230501May 2023	3	0.5
230601June 2023	3	1.3
230701July 2023			6.7
230801August 2023
220101January 2022			4.5
220201February 2022			1.7
220301March 2022	3	2.4
220401April 2022	3	0.5
220501May 2022	3	1.9
220601June 2022	3	1.7
220701July 2022			5.2
220801August 2022			1.6
220901September 2022			1.8
221001October 2022			2.8
221101November 2022			0.7
221201December 2022			3.0
210101January 2021			1.2
210201February 2021			2.4
210301March 2021	3	0.8
210401April 2021	3	2.0
210501May 2021	3	1.1
210601June 2021	3	1.0
210701July 2021			1.3
210801August 2021			0.4
210901September 2021			0.8
211001October 2021			1.9
211101November 2021			2.4
211201December 2021			4.1
200101January 2020			1.8
200201February 2020			1.0
200301March 2020	3	1.6
200401April 2020	3	2.3
200501May 2020	3	2.7
200601June 2020	3	1.1
200701July 2020			0.4
200801August 2020			0.7
200901September 2020			1.0
201001October 2020			3.0
201101November 2020			5.6
201201December 2020			2.5
190101January 2019			0.4
190201February 2019			0.3
190301March 2019	3	0.4
190401April 2019	3	0.6
190501May 2019	3	0.5
190601June 2019	3	0.6
190701July 2019			2.4
190801August 2019			4.7
190901September 2019			6.6
191001October 2019			13.6
191101November 2019			7.0
191201December 2019			2.0
180101January 2018			1.1
180201February 2018			1.3
180301March 2018	3	0.7
180401April 2018	3	0.4
180501May 2018	3	0.9
180601June 2018	3	0.7
180701July 2018			0.6
180801August 2018			0.3
180901September 2018			0.2
181001October 2018			0.6
181101November 2018			1.0
181201December 2018			0.8
170101January 2017			3.4
170201February 2017			1.5
170301March 2017	3	0.5
170401April 2017	3	1.0
170501May 2017	3	1.7
170601June 2017	3	1.7
170701July 2017			1.1
170801August 2017			1.8
170901September 2017			3.0
171001October 2017			4.2
171101November 2017			0.7
171201December 2017			1.0
160101January 2016			0.8
160201February 2016			0.5
160301March 2016	3	0.2
160401April 2016	3	0.7
160501May 2016	3	1.0
160601June 2016	3	1.3
160701July 2016			1.0
160801August 2016			2.2
160901September 2016			5.3
161001October 2016			13.3
161101November 2016			3.7
161201December 2016			7.8
150101January 2015			5.8
150201February 2015			5.0
150301March 2015	3	7.3
150401April 2015	3	10.8
150501May 2015	3	8.6
150601June 2015	3	9.0
150701July 2015			10.7
150801August 2015			14.9
150901September 2015			10.8
151001October 2015			13.6
151101November 2015			8.8
151201December 2015			1.2
140101January 2014			9.6
140201February 2014			6.7
140301March 2014	3	2.8
140401April 2014	3	1.5
140501May 2014	3	0.2
140601June 2014	3	0.2
140701July 2014			0.7
140801August 2014			0.9
140901September 2014			3.2
141001October 2014			4.4
141101November 2014			4.2
141201December 2014			3.0
130101January 2013			15.5
130201February 2013			12.0
130301March 2013	3	8.2
130401April 2013	3	3.0
130501May 2013	3	4.1
130601June 2013	3	2.7
130701July 2013			2.0
130801August 2013			7.7
130901September 2013			11.2
131001October 2013			13.2
131101November 2013			15.3
131201December 2013			9.2
120101January 2012			1.3
120201February 2012			1.1
120301March 2012	3	0.8
120401April 2012	3	1.9
120501May 2012	3	2.1
120601June 2012	3	0.2
120701July 2012			2.1
120801August 2012			5.3
120901September 2012			1.6
121001October 2012			6.7
121101November 2012			12.3
121201December 2012			10.0
110101January 2011			0.5
110201February 2011			0.3
110301March 2011	3	0.2
110401April 2011	3	0.3
110501May 2011	3	0.4
110601June 2011	3	0.4
110701July 2011			1.3
110801August 2011			4.2
110901September 2011			4.7
111001October 2011			8.1
111101November 2011			6.1
111101December 2011			2.4

Quatsino Sound

Long text version

Sea lice abundance at BC salmon farms in the Quatsino Sound area, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			0.1
230201February 2023			0.1
230301March 2023	3	0.1
230401April 2023	3	0.1
230501May 2023	3	0.1
230601June 2023	3	0.1
230701July 2023			0.2
230801August 2023
220101January 2022			7.4
220201February 2022			7.6
220301March 2022	3	2.2
220401April 2022	3	5.5
220501May 2022	3	8.2
220601June 2022	3
220701July 2022
220801August 2022
220901September 2022
221001October 2022
221101November 2022
221201December 2022			0.0
210101January 2021			0.2
210201February 2021			0.3
210301March 2021	3	0.4
210401April 2021	3	0.4
210501May 2021	3	0.3
210601June 2021	3	0.4
210701July 2021			0.4
210801August 2021			0.1
210901September 2021			0.5
211001October 2021			1.2
211101November 2021			4.4
211201December 2021			11.7
200101January 2020			0.9
200201February 2020			1.9
200301March 2020	3	2.7
200401April 2020	3	2.9
200501May 2020	3	4.2
200601June 2020	3	2.0
200701July 2020			1.8
200801August 2020
200901September 2020
201001October 2020
201101November 2020			0.1
201201December 2020			0.1
190101January 2019			0.1
190201February 2019			0.2
190301March 2019	3	0.4
190401April 2019	3	0.3
190501May 2019	3	0.3
190601June 2019	3	0.5
190701July 2019			1.0
190801August 2019			4.7
190901September 2019			11.6
191001October 2019			9.1
191101November 2019			1.8
191201December 2019			1.0
180101January 2018			0.1
180201February 2018			0.1
180301March 2018	3	0.1
180401April 2018	3	0.3
180501May 2018	3	0.8
180601June 2018	3	0.7
180701July 2018
180801August 2018
180901September 2018
181001October 2018
181101November 2018			0.0
181201December 2018			0.1
170101January 2017			0.1
170201February 2017			0.2
170301March 2017	3	0.2
170401April 2017	3	0.3
170501May 2017	3	0.1
170601June 2017	3	0.2
170701July 2017			0.3
170801August 2017			0.7
170901September 2017			1.4
171001October 2017			3.1
171101November 2017			3.5
171201December 2017			0.6
160101January 2016			1.5
160201February 2016			4.1
160301March 2016	3	8.8
160401April 2016	3	13.9
160501May 2016	3
160601June 2016	3
160701July 2016
160801August 2016
160901September 2016
161001October 2016
161101November 2016			0.0
161201December 2016			0.1
150101January 2015			1.6
150201February 2015			3.0
150301March 2015	3	3.9
150401April 2015	3	9.4
150501May 2015	3	6.2
150601June 2015	3	4.5
150701July 2015			4.1
150801August 2015			1.3
150901September 2015			0.9
151001October 2015			1.3
151101November 2015			1.4
151201December 2015			1.1
140101January 2014			4.0
140201February 2014			2.7
140301March 2014	3	1.2
140401April 2014	3	0.6
140501May 2014	3	0.4
140601June 2014	3	0.9
140701July 2014			1.6
140801August 2014			2.8
140901September 2014			4.1
141001October 2014			3.3
141101November 2014			0.7
141201December 2014			0.6
130101January 2013			1.0
130201February 2013			1.7
130301March 2013	3	1.8
130401April 2013	3	1.9
130501May 2013	3	1.2
130601June 2013	3	1.8
130701July 2013			2.4
130801August 2013			5.1
130901September 2013			12.0
131001October 2013			18.9
131101November 2013			5.6
131201December 2013			4.4
120101January 2012			0.5
120201February 2012			1.3
120301March 2012	3	1.5
120401April 2012	3	1.6
120501May 2012	3	0.7
120601June 2012	3
120701July 2012			0.7
120801August 2012
120901September 2012			2.9
121001October 2012			4.0
121101November 2012			1.6
121201December 2012			1.9
110101January 2011			3.8
110201February 2011			1.4
110301March 2011	3	0.6
110401April 2011	3	0.9
110501May 2011	3	1.2
110601June 2011	3	1.3
110701July 2011			2.4
110801August 2011			6.9
110901September 2011			7.5
111001October 2011			1.6
111101November 2011			0.6
111101December 2011			0.5

Nootka Sound

Long text version

Sea lice abundance at BC salmon farms in the Nootka Sound area, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			0.0
230201February 2023			0.0
230301March 2023	3	0.0
230401April 2023	3	0.0
230501May 2023	3	0.1
230601June 2023	3	0.0
230701July 2023
230801August 2023
220101January 2022			1.3
220201February 2022			1.1
220301March 2022	3	1.0
220401April 2022	3	1.0
220501May 2022	3	1.4
220601June 2022	3	0.9
220701July 2022			1.0
220801August 2022
220901September 2022
221001October 2022
221101November 2022			0.0
221201December 2022			0.0
210101January 2021			0.0
210201February 2021			0.0
210301March 2021	3	0.2
210401April 2021	3	0.1
210501May 2021	3	0.1
210601June 2021	3	0.1
210701July 2021			0.4
210801August 2021			2.9
210901September 2021			7.9
211001October 2021			3.4
211101November 2021			1.6
211201December 2021			0.9
200101January 2020			4.7
200201February 2020			3.9
200301March 2020	3	5.6
200401April 2020	3	4.0
200501May 2020	3	6.4
200601June 2020	3	2.4
200701July 2020			1.5
200801August 2020
200901September 2020
201001October 2020			0.0
201101November 2020			0.0
201201December 2020			0.0
190101January 2019			0.0
190201February 2019			0.0
190301March 2019	3	0.0
190401April 2019	3	0.1
190501May 2019	3	0.1
190601June 2019	3	1.0
190701July 2019			2.7
190801August 2019			9.6
190901September 2019			7.6
191001October 2019			13.4
191101November 2019			9.5
191201December 2019			9.1
180101January 2018			2.6
180201February 2018			3.5
180301March 2018	3	4.3
180401April 2018	3	4.8
180501May 2018	3	4.0
180601June 2018	3	2.1
180701July 2018
180801August 2018
180901September 2018			0.0
181001October 2018			0.0
181101November 2018			0.0
181201December 2018			0.0
170101January 2017			0.1
170201February 2017			0.0
170301March 2017	3	0.0
170401April 2017	3	0.1
170501May 2017	3	0.1
170601June 2017	3	0.1
170701July 2017			0.1
170801August 2017			0.6
170901September 2017			4.5
171001October 2017			8.5
171101November 2017			8.4
171201December 2017			1.1
160101January 2016			1.1
160201February 2016			1.7
160301March 2016	3	2.2
160401April 2016	3	2.7
160501May 2016	3	2.1
160601June 2016	3	1.3
160701July 2016
160801August 2016
160901September 2016
161001October 2016			0.1
161101November 2016			0.0
161201December 2016			0.0
150101January 2015			0.9
150201February 2015			0.5
150301March 2015	3	0.5
150401April 2015	3	0.4
150501May 2015	3	0.3
150601June 2015	3	0.9
150701July 2015			5.2
150801August 2015			4.3
150901September 2015			2.9
151001October 2015			2.4
151101November 2015			1.6
151201December 2015			1.0
140101January 2014			0.2
140201February 2014			0.1
140301March 2014	3	0.2
140401April 2014	3	0.3
140501May 2014	3	0.2
140601June 2014	3	0.1
140701July 2014			0.1
140801August 2014			1.5
140901September 2014			3.1
141001October 2014			3.2
141101November 2014			2.5
141201December 2014			0.2
130101January 2013			1.7
130201February 2013			1.2
130301March 2013	3	1.3
130401April 2013	3	0.4
130501May 2013	3	0.3
130601June 2013	3	0.3
130701July 2013			0.2
130801August 2013			1.4
130901September 2013			2.9
131001October 2013			2.6
131101November 2013			0.7
131201December 2013			0.5
120101January 2012			0.5
120201February 2012			0.3
120301March 2012	3	0.4
120401April 2012	3	0.3
120501May 2012	3	0.3
120601June 2012	3
120701July 2012			0.2
120801August 2012			0.3
120901September 2012
121001October 2012			2.2
121101November 2012			2.2
121201December 2012			1.9
110101January 2011	0.3
110201February 2011			0.4
110301March 2011	3	0.4
110401April 2011	3	0.5
110501May 2011	3	0.5
110601June 2011	3	0.3
110701July 2011			0.4
110801August 2011			0.3
110901September 2011			0.6
111001October 2011			0.8
111101November 2011			0.7
111101December 2011			1.4

Clayoquot Sound

Long text version

Sea lice abundance at BC salmon farms in Clayoquot Sound, 2011 to 2023

Month and year	Management threshold	Average sea lice abundance during wild salmon outmigration period (March to June)	Average sea lice abundance during rest of year (July to February)
230101January 2023			0.4
230201February 2023			0.3
230301March 2023	3	0.4
230401April 2023	3	0.4
230501May 2023	3	0.2
230601June 2023	3	0.1
230701July 2023			1.5
230801August 2023
220101January 2022			5.7
220201February 2022			4.2
220301March 2022	3	5.1
220401April 2022	3	4.2
220501May 2022	3	2.3
220601June 2022	3	1.1
220701July 2022			0.7
220801August 2022			0.6
220901September 2022			0.4
221001October 2022			0.5
221101November 2022			0.4
221201December 2022			0.4
210101January 2021			2.0
210201February 2021			1.6
210301March 2021	3	0.6
210401April 2021	3	0.7
210501May 2021	3	1.0
210601June 2021	3	1.5
210701July 2021			2.7
210801August 2021			3.5
210901September 2021			7.7
211001October 2021			3.3
211101November 2021			3.1
211201December 2021			4.4
200101January 2020			1.5
200201February 2020			1.0
200301March 2020	3	1.0
200401April 2020	3	1.2
200501May 2020	3	1.7
200601June 2020	3	2.4
200701July 2020			2.2
200801August 2020			1.4
200901September 2020			2.8
201001October 2020			0.6
201101November 2020			1.4
201201December 2020			1.6
190101January 2019			3.8
190201February 2019			1.9
190301March 2019	3	2.2
190401April 2019	3	3.4
190501May 2019	3	1.8
190601June 2019	3	0.1
190701July 2019			0.2
190801August 2019			0.6
190901September 2019			1.9
191001October 2019			2.7
191101November 2019			2.4
191201December 2019			1.9
180101January 2018			2.9
180201February 2018			5.0
180301March 2018	3	7.2
180401April 2018	3	8.9
180501May 2018	3	11.9
180601June 2018	3	13.0
180701July 2018			9.2
180801August 2018			14.5
180901September 2018			6.6
181001October 2018			3.3
181101November 2018			1.5
181201December 2018			1.3
170101January 2017			0.8
170201February 2017			1.1
170301March 2017	3	1.5
170401April 2017	3	1.0
170501May 2017	3	1.9
170601June 2017	3	0.7
170701July 2017			0.9
170801August 2017			1.7
170901September 2017			2.7
171001October 2017			2.8
171101November 2017			2.0
171201December 2017			1.8
160101January 2016			1.1
160201February 2016			0.9
160301March 2016	3	1.1
160401April 2016	3	0.9
160501May 2016	3	0.9
160601June 2016	3	1.1
160701July 2016			1.1
160801August 2016			0.8
160901September 2016			0.7
161001October 2016			0.4
161101November 2016			0.2
161201December 2016			0.3
150101January 2015			0.1
150201February 2015			0.2
150301March 2015	3	0.7
150401April 2015	3	1.1
150501May 2015	3	1.3
150601June 2015	3	1.7
150701July 2015			2.2
150801August 2015			2.0
150901September 2015			7.3
151001October 2015			2.5
151101November 2015			0.9
151201December 2015			0.9
140101January 2014			0.3
140201February 2014			0.6
140301March 2014	3	0.5
140401April 2014	3	0.7
140501May 2014	3	1.3
140601June 2014	3	0.9
140701July 2014			0.9
140801August 2014			0.3
140901September 2014			0.2
141001October 2014			0.1
141101November 2014			0.1
141201December 2014			0.1
130101January 2013			0.2
130201February 2013			0.3
130301March 2013	3	0.7
130401April 2013	3	1.3
130501May 2013	3	0.4
130601June 2013	3	0.5
130701July 2013			0.3
130801August 2013			0.7
130901September 2013			0.3
131001October 2013			0.2
131101November 2013			0.3
131201December 2013			0.3
120101January 2012			0.3
120201February 2012			0.5
120301March 2012	3	0.7
120401April 2012	3	0.6
120501May 2012	3	0.5
120601June 2012	3	0.4
120701July 2012			0.7
120801August 2012
120901September 2012			0.4
121001October 2012			0.2
121101November 2012			0.2
121201December 2012			0.1
110101January 2011			0.2
110201February 2011			1.9
110301March 2011	3	0.3
110401April 2011	3	0.4
110501May 2011	3	0.5
110601June 2011	3	0.5
110701July 2011			0.9
110801August 2011			2.0
110901September 2011			1.0
111001October 2011			0.9
111101November 2011			0.4
111101December 2011			0.3