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General Water Use Restrictions

Aquatic Vegetation Herbicide Control Water Use Restrictions 1- number of days after treatment before use in private waters only.

 
Human Use
Livestock
Irrigation
Common Name
Drinking
Swimming
Fish
Watering
Turf
Crops
copper sulfate 2
0
0
0
0
0
0
copper complexes
0
0
0
0
0
0
2,4-D
*
*
*
*
*
*
diquat
2-3
0
0
1-3 3
2-3
5
endothall 4
7-25
1
0
7-25
7-25
7-25
glyphosate 5
0
0
0
0
0
0
fluridone 6
0
0
0
0
7-30
7-30
triclopyr
#
0
0
0
0 7
120 8
imazapyr @ 0 0 0 120 9 120 9
SCP 0 0 0 0 0 0

1 Aquatic vegetation control can result in a period of low dissolved oxygen which can stress and/or kill fish. It is best to treat most aquatic vegetation early in the growing season, when the plant is rapidly growing. Treating small areas (e.g. 1/4) of pond at a time at 10 - 14 day intervals will allow for decomposition usually without causing an oxygen depletion.

2 If water is for drinking, the elemental copper concentration should not exceed 1.0 ppm (i.e. 4.0 ppm copper sulfate)

3 Depending on forumulation - Read label.

4 Length of use restriction for endothall varies with concentration used. Read label.

5 Do not apply within 0.5 mile of a functioning potable water intake.

6 Do not apply within 0.25 mile of a functioning potable water intake.

7 No restriction on irrigating established grasses but do not harvest hay for 14 days after application. Read label.

8 Or until non-detectable concentrations in immunoassay analysis.

* Water restrictions on 2,4-D vary with formulation, rate, and time of year. Read label.

# Minimum setback distances from potable water intakes required and laboratory tests to determine < 0.4ppm for use. Read label.

@ > 1/2 mile from potable water intake

9 Or until < 1.0 ppb

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