MN Water Science Center: Summary of pesticides in rain at all sites, May through September 1994.

Table 6.--Summary of pesticides in rain at all sites, May through September 1994.

[Total number of samples is 107 from 6 sites (Park Rapids, Princeton, Minneapolis, Crystal Springs, Blue Earth, and Lamberton) Laboratory analysis conducted at the University of Minnesota; mg/L, micrograms per liter; --, not determined]
Common name	Brand name	Percent detection	Maximum concentration ( mg/L)	Date of maximum concentration	Site of maximum concentration
Herbicides
Atrazine	Aatrex	93	2.8	June 7	Lamberton
Alachlor	Lasso	87	1.2	May 24	Princeton
Cyanazine	Bladex	68	24	May 24	Princeton
Metribuzin	Sencor	62	1.1	June 14	Minneapolis
Metolachlor	Dual	51	.70	June 7	Lamberton
Acetochlor	Harness+	36	.46	April 26	Crystal Springs
EPTC	Eradicane	35	.26	August 2	Princeton
Pendimethalin	Prowl	32	.43	May 3	Princeton
Simazine	Princep	28	.11	June 8	Blue Earth
Propazine	Milogard	26	.06	June 7	Lamberton
Propachlor	Ramrod	21	.51	June 7	Lamberton
Prometon	Pramitol	19	.08	August 9	Park Rapids
Ethalfluralin	Sonalan	13	.08	June 25	Princeton
Trifluralin	Treflan	9	.21	June 7	Lamberton
Propanil	Erban	8	.28	May 3	Blue Earth
Terbacil	Sinbar	7	.07	July 5	Lamberton
Pebulate	Tillam	6	.03	October 4	Lamberton
Butylate	Sutan+	3	.02	October 4	Crystal Springs
Tebuthiuron	Spike	2	.01	June 14	Lamberton
Triallate	Far-Go	1	.02	June 7	Princeton
Benfluralin	Benefin	0	<.01	--	--
Insecticides
Methyl parathion	Penncap-M	51	.49	June 14	Minneapolis
Azinphos-methyl	Guthion	41	1.27	July 5	Lamberton
Terbufos	Counter	24	1.14	May 3	Princeton
Chlorpyrifos	Lorsban	22	.06	August 2	Crystal Springs
Fonofos	Dyfonate	21	.33	July 5	Lamberton
Lindane	Lindane	17	.19	September 27	Lamberton
Malathion	Cythion	8	.19	July 5	Lamberton
Phorate	Thimet	4	.03	August 2	Princeton
Permethrin	Ambush	3	.15	July 5	Lamberton
Diazinon	Diazinon	0	<.01	--	--
Ethoprop	Mocap	0	<.01	--	--

Table 6.--Summary of pesticides in rain at all sites, May through September 1994.

[Total number of samples is 107 from 6 sites (Park Rapids, Princeton, Minneapolis, Crystal Springs, Blue Earth, and Lamberton) Laboratory analysis conducted at the University of Minnesota; mg/L, micrograms per liter; --, not determined]

Common name

Brand name

Percent detection

Maximum concentration

( mg/L)

Date of maximum concentration

Site of maximum concentration

Herbicides

Atrazine

Aatrex

2.8

June 7

Lamberton

Alachlor

Lasso

1.2

May 24

Princeton

Cyanazine

Bladex

May 24

Princeton

Metribuzin

Sencor

1.1

June 14

Minneapolis

Metolachlor

Dual

.70

June 7

Lamberton

Acetochlor

Harness+

.46

April 26

Crystal Springs

EPTC

Eradicane

.26

August 2

Princeton

Pendimethalin

Prowl

.43

May 3

Princeton

Simazine

Princep

.11

June 8

Blue Earth

Propazine

Milogard

.06

June 7

Lamberton

Propachlor

Ramrod

.51

June 7

Lamberton

Prometon

Pramitol

.08

August 9

Park Rapids

Ethalfluralin

Sonalan

.08

June 25

Princeton

Trifluralin

Treflan

.21

June 7

Lamberton

Propanil

Erban

.28

May 3

Blue Earth

Terbacil

Sinbar

.07

July 5

Lamberton

Pebulate

Tillam

.03

October 4

Lamberton

Butylate

Sutan+

.02

October 4

Crystal Springs

Tebuthiuron

Spike

.01

June 14

Lamberton

Triallate

Far-Go

.02

June 7

Princeton

Benfluralin

Benefin

<.01

Insecticides

Methyl parathion

Penncap-M

.49

June 14

Minneapolis

Azinphos-methyl

Guthion

1.27

July 5

Lamberton

Terbufos

Counter

1.14

May 3

Princeton

Chlorpyrifos

Lorsban

.06

August 2

Crystal Springs

Fonofos

Dyfonate

.33

July 5

Lamberton

Lindane

.19

September 27

Lamberton

Malathion

Cythion

.19

July 5

Lamberton

Phorate

Thimet

.03

August 2

Princeton

Permethrin

Ambush

.15

July 5

Lamberton

Diazinon

<.01

Ethoprop

Mocap

<.01

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