CA State Parks, Division of Boating & Waterways – Water Hyacinth Treatments

  • NewsWater
  • by BPC Staff
  • on July 6, 2015



CA State Parks, Division of Boating and Waterways

Water Hyacinth and Spongeplant Control Program – 2015


Treatments for the Week of July 6 thru July 10 

water hyacinth








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“Treatment sites and schedules are subject to change based on regulatory requirements, weather conditions, plant growth and movement, waterway traffic, listed fish presence surveys, and other conditions.”

  • Spraying will be conducted during the hours of 7am to 4pm weekly, Monday thru Friday.
  • Herbicide applications during the treatment period will utilize Glyphosate (Roundup Custom), Imazamox (Clearcast) and 2, 4-D (Weedar).
  • Note: 2, 4-D may be used in the legal Delta between June 15th and September 15th, and in southern sites between July 15th and August 15th.

Treatment Period:


Area 2-4: Mar. 4th, 2015 – Nov. 30, 2015
Area 1: June 1, 2015 – Nov. 30, 2015

County References:

ALA – Alameda; CC – Contra Costa;

MER – Merced; SAC – Sacramento; SJ – San Joaquin;

STAN – Stanislaus; SOL – Solano; YOLO – Yolo

As of June 30, 2015
1,271* acres of Water
Hyacinth have been
treated at 98 sites
with 256 total


* Data is preliminary and

    subject to change.




Detailed Site Information

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Southern Treatment
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