Guidelines for Canadian drinking water quality – Malathion: Canadian water quality data

**Table B1. Levels of malathion in Canadian aquatic sources and air from the National Water Quality Surveillance Program (2003-2005)**
Jurisdiction (year sampled)	No. detects/ samples	MDL (ng/L)	Range (ng/L)
Jurisdiction (year sampled)	No. detects/ samples	MDL (ng/L)	Min	Max
AB, SK, MB - 8 sites (2003)	0/13	14.7	Not available	Not available
AB, SK, MB - 15 sites (2003-2004)	0/30	14.70	< 14.70	< 14.70
BC - Lower Fraser Valley and Okanagan Basin (2003-2005)	7/96	0.062	< 0.062	75.1
ON (2003)	1/162	14.7	143	143
ON (2004)	2/228	14.7	31.7	449
ON (2005)	3/160	14.7	10.4	611
ON - 10 isolated lakes (2003-2005)	3/163	0.001	< 0.001	2.20
ON - 4 sites (2004-2005)	0/12	0.000	< 0.000	Not available
QC (2003)	0/49	20	Not available	Not available
QC (2004)	0/69	4-20	Not available	Not available
QC (2005)	0/62	20	Not available	Not available
MDL: method detection limit Note: Adapted from Environment Canada, 2011

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