2007 January – 2007 August: Helena River (WA). Pesticides: Multiple

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A baseline study of organic contaminants in the Swan and Canning catchment drainage system using passive sampling devices. Government of Western Australia Department of Water. December 2009

Helena River, WA

Deployment period two; January – February 2007
The estimated concentration in water (CW) (ng/L) of herbicides predicted from ED passive samplers deployed in January – February 2007 in sub-catchments near Perth. The sampling rates used 0.12 L/day.

Diuron: (Replicate A) 44ng/ED, 12Cw. (Replicate B) 40ng/ED, 11Cw. 9.5 ND%

Simazine: (Replicate A) 19ng/ED, 5.1Cw. (Replicate B) 18ng/ED, 4.7Cw. 5.4 ND%

Atrazine: (Replicate A) 5ng/ED, 1.4Cw. (Replicate B) 2.1ng/ED, 0.6Cw. 83 ND%

Desethyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Desisopropyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Hexazinone: (Replicate A) 6.7ng/ED, 1.8Cw. (Replicate B) 6.3ng/ED, 1.7Cw. 5.3 ND%

Ametryn: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) 2.5ng/ED, 0.7Cw. – %

Mean ND 26%

The estimated concentration in water (ng/L) of insecticides predicted from PDMS passive samplers deployed during January – February 2007 in sub-catchments near Perth.

Phosphate Tri-n-butyl: 8ng/L (Replicate A), 13ng/L (Replicate B)

Trifluralin: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Diazinon: 63ng/L (Replicate A), 54ng/L (Replicate B)

Terbuthylazine: <8ng/L (Replicate A), <8ng/L (Replicate B)

Triallate: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Terbutryn: <3ng/L (Replicate A), <3 (Replicate B)

Chlorpyrifos: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Chlordane Trans: 0.2ng/L (Replicate A), 0.2ng/L (Replicate B)

Dieldrin: 2ng/L (Replicate A), <0.5ng/L (Replicate B)

Propiconazole: <3ng/L (Replicate A), 9ng/L (Replicate B)

Mean ND%: 21

Deployment period three; April – May 2007
The estimated concentration in water (CW) (ng/L) of herbicides predicted from ED passive samplers deployed in January – February 2007 in sub-catchments near Perth. The sampling rates used 0.12 L/day.

Diuron: (Replicate A) 72ng/ED, 23Cw. (Replicate B) 61ng/ED, 19Cw. 16.9 ND%

Simazine: (Replicate A) 110ng/ED, 36Cw. (Replicate B) 110ng/ED, 36Cw. 1.2 ND%

Atrazine: (Replicate A) 15ng/ED, 4.9Cw. (Replicate B) 19ng/ED, 6.1Cw. 21 ND%

Desethyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, 0.3Cw. – ND%

Desisopropyl Atrazine: (Replicate A) 7.7ng/ED, 2.5Cw. (Replicate B) 10ng/ED, 3.2Cw. 26 ND%

Hexazinone: (Replicate A) 3.1ng/ED, 1.0Cw. (Replicate B) 4.6ng/ED, 1.5Cw. 39 ND%

Mean ND 21%

The concentration in water (ng/L) of herbicides, detected in snapshot water samples collected during April – May 2007.

Diuron: Replicates 16 Apr 39ng/L, 23 Apr 54ng/L. Mean 23 Apr 46ng/L

Simazine: Replicates 16 Apr 90ng/L, 23 Apr 43ng/L. Mean 23 Apr 66ng/L

Atrazine: Replicates 16 Apr 8.3ng/L, 23 Apr 5.1ng/L. Mean 23 Apr 6.7ng/L

Desethyl Atrazine: Replicates 16 Apr <1ng/L, 23 Apr <1ng/L. Mean 23 Apr <1ng/L

Desisopropyl Atrazine: Replicates 16 Apr 9.2ng/L, 23 Apr 7.1ng/L. Mean 23 Apr 8.1ng/L

Hexazinone: Replicates 16 Apr <1ng/L, 23 Apr 1.8ng/L. Mean 23 Apr <1ng/L

Ametryn: Replicates 16 Apr <1ng/L, 23 Apr <1ng/L. Mean 23 Apr <1ng/L

The estimated concentration in water (ng/L) of insecticides predicted from PDMS passive samplers deployed during April – May 2007 in subcatchments near Perth.

Phosphate Tri-n-Butyl: <30ng/L (Replicate A), <30ng/L (Replicate B)

Trifluralin: 1ng/L (Replicate A), 0.9ng/L (Replicate B)

Diazinon: 121ng/L (Replicate A), 114ng/L (Replicate B)

Propazine: <10ng/L (Replicate A), <10ng/L (Replicate B)

Terbutryn: <3ng/L (Replicate A), <3ng/L (Replicate B)

Chlorpyrifos: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Metolachlor: <8ng/L (Replicate A), 6ng/L (Replicate B)

Hepatchor Epoxide: <1ng/L (Replicate A), <1ng/L (Replicate B)

Chlordane Trans: <1ng/L (Replicate A), <1ng/L (Replicate B)

Oxadiazon: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Dieldrin: 2ng/L (Replicate A), 2ng/L (Replicate B)

Piperonyl Butoxide: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Benalaxyl: <3ng/L (Replicate A), <3ng/L (Replicate B)

Propiconazole: 15ng/L (Replicate A), 12ng/L (Replicate B)

Bifenthrin: <1ng/L (Replicate A), <1ng/L (Replicate B)

Rotenone: <2ng/L (Replicate A), <2ng/L (Replicate B)

Mean ND 16%

Deployment period four; July – August 2007
The estimated concentration in water (ng/L) of herbicides predicted from ED passive samplers deployed in July – August 2007 in subcatchments near Perth. The sampling rates used 0.12 L/day.

Diuron: 16ng/L (Replicate A), 11ng/L (Replicate B)

Simazine: 150ng/L (Replicate A), 110ng/L (Replicate B)

Atrazine: 17ng/L (Replicate A), 14ng/L (Replicate B)

Desethyl Atrazine: 2.1ng/L (Replicate A), 1.9ng/L (Replicate B)

Desisopropyl Atrazine: 8.3ng/L (Replicate A), 9.1ng/L (Replicate B)

Hexazinone: 3.7ng/L (Replicate A), 2.5ng/L (Replicate B)

Tebuthiuron: 0.3ng/L (Replicate A), <1ng/L (Replicate B)

The estimated concentration in water (ng/L) of insecticides predicted from PDMS passive samplers deployed during July – August 2007 in subcatchments near Perth.

Phosphate Tri-n-Butyl: 21ng/L (Replicate A), 19ng/L (Replicate B)

Trifluralin: 1ng/L (Replicate A), 1ng/L (Replicate B)

Diazinon: <6ng/L (Replicate A), <6ng/L (Replicate B)

Triallate: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Terbutryn: 3ng/L (Replicate A), 4ng/L (Replicate B)

Chlorpyrifos: 5ng/L (Replicate A), 5ng/L (Replicate B)

Metolachlor: 11ng/L (Replicate A), 8ng/L (Replicate B)

Hepatchor Epoxide: 1ng/L (Replicate A), 1ng/L (Replicate B)

Pendimethalin: <1ng/L (Replicate A), <1ng/L (Replicate B)

Chlordane Trans: <1ng/L (Replicate A), <1ng/L (Replicate B)

Methidathion: 102ng/L (Replicate A), 100ng/L (Replicate B)

Oxadiazon: 4ng/L (Replicate A), 4ng/L (Replicate B)

Dieldrin: 5ng/L (Replicate A), 5ng/L (Replicate B)

Piperonyl Butoxide: 1ng/L (Replicate A), 2ng/L (Replicate B)

Benalaxyl: <3ng/L (Replicate A), <3ng/L (Replicate B)

Propiconazole: 9ng/L (Replicate A), 8ng/L (Replicate B)

Bifenthrin: <1ng/L (Replicate A), <1ng/L (Replicate B)

Mean ND 10