Lake Gaston Weed Control Council uses scripts on their website

Controlling Weeds in Lake Gaston - Frequently Asked Questions

Answers provided by members of the Lake Gaston Weed Control Council on controlling weeds in lakes. You can download a copy of the FAQs and Answers by clicking here.

Hydrilla Status on Lake Gaston (December 2022)

The Lake Gaston Weed Control Council is now in a monitoring process with Hydrilla. Over the past several years we have been below 300 acres of Hydrilla per our annual full lake survey. It was the goal of the Lake Gaston Stakeholders to establish a goal of 300 acres being accepted as under control. At this time, we are requesting residents to treat their own areas if they see Hydrilla with the applicator listed on the lgwcc website ( The Lgwcc will monitor Hydrilla for an unexpected large breakout.

Our resources are limited, and we are treating Lyngbya which is much more expensive and difficult to get under control. All the questions listed here are still applicable to Hydrilla. They may be dated but they did happen and were resolved. You can also go to the website for NCSU and report Hydrilla or Lyngbya. (

Who makes the decision on which area is treated? (June 2009)

The final approval for the annual plan is made by the Lake Gaston Weed Council board of voting directors of which there are 3 for each of the 5 counties. The plan begins with a review of the annual survey by the Technical Advisory Group (TAG). It then moves to the Stake Holders group for their final input and approval. The plan allows for changes made by the appointed applicator for that year along with input from Seapro the provider of the chemicals to be used in certain areas. This plan this is presented to the council for approval normally in May of each year.

Our area was treated 2 years ago. When will we be treated again? (June 2011)

The Lake Gaston Weed Control Council does not treat each area on a regular schedule. The decision to treat a specific area depends on several factors: The results of the annual Remetrix Lake Survey, degree of infestation, water depth and water flow. These are all critical to the use of the time release chemical Sonar. It is very important that if you do receive public treatment that you follow up in subsequent years with private treatment. Hydrilla can only be controlled by continuous and contiguous treatment by both public and private applications. Grass carp are used in waters that are too deep and water flow to strong for chemical treatment. Attempts are made to treat new areas each year, but the mission of the council is to make the most effective use of the funds available.

If I contract for private treatment will that eliminate me from public treatment? (January 2012)

All contractors currently on the lake honor a contract if it moves to public treatment. They will normally offer to roll the contract for a year or return your money. As a note, it is illegal for any contractor to double treat an area. This will have negative effects on plants and animal life in the water. You as the contracting person should also assure you have written documentation that your applicator has notified Dominion Power of the treatment areas and with what chemical.

Mats of Hydrilla are blocking my boat dock and I cannot get my boat out for fishing, what can I do? (December 2012)

There is not an agency on the lake that has a charter to remove floating mats of Hydrilla. These break loose when the weed dies on the surface breaks loose and then by the water flow is carried along. We encourage property owners to notify us of their locations and do your best to remove them from the water. These mats carry the seed pods (turions) and will re seed wherever it drops those seed pods.

How do I know what areas were selected for treatment? (May 2010)

There are several places to attain this information. The LGWCC website is the primary site. Also you will find it on the selected applicators web page. It will also be published in the Lake Gaston Association (LGA) bulletin and the various local newspapers around the lake. Most important if you can attend the council meetings you will see first hand all the steps to the process. These are posted on the web sites of the weed council and the LGA. Also, notices are placed on the boat docks of the treatment areas notifying owners when the 3 treatments will take place.

Why is there not more grass carp used on the for controlling weeds in Lake Gaston? (August 2010)

This is a great question.....there have been many suggestions made by property owners to increase the amount of fish that are put into the lake. Simply put too much of a good thing could become a bad thing. The approach on the lake with input from North Carolina State University and others is one of balance of not just fish but chemicals with the end vision of re-vegetation in many parts of the lake with native plants. The current level of grass carp is 15 fish per infected acre. This is a number that has been agreed to by both NC and VA wildlife agencies. This does vary from year to year based upon how many infected acres of Hydrilla is reported each year. Recently we have increased the locations were fish are inserted.

I have heard so many things about grass carp. How do we know what they do? (May 2009)

It is certainly understandable why anyone would be somewhat confused. The weed council was also. In the past 3 years we have had Virginia Tech do a study on grass carp. We wanted to know how far they traveled after being released, what is the mortality rate and if in fact they are eating Hydrilla. They inserted GPS type sensors in the fish prior to being released and each fish transponder had a different code and sent out signals several times a minute. We found they traveled as far a 4 to 6 miles but the norm was about 1 to 2 miles from release. Thus the determination to increase our release points. A mortality rate was determined. Actually sensors were found on land after predator birds captured the fish and ate them. This mortality rate caused NC State to adjust the planned mortality rate to a higher one. We also conducted a survey of bow hunting grass carp with clubs on the lake and took a key part of the fish (otilith) to determine the age of the fish in reference to its size. This assured us they were eating Hydrilla.

How is the LGWCC funded? (June 2009)

The LGWCC is the only entity on the lake that can receive funds for public use. The sources for funds come from several locations. The five (5) counties are the largest contributors at about $116,000 per county. However, in the last few years we have seen some counties lower their contribution dramatically. The City of Virginia Beach contributes on the average about $250,000 per year. The state of N.C. matches some of the funds at about $100,000 per year. The council received little to none from the Federal Government or the state of Virginia. Dominion Power is a partner and typically will pay for the cost of the grass carp or re-vegetation efforts. The total funds collected in any given year is about 1.2 million dollars. This amount is down from previous years due to the cut back from some counties. This makes it difficult to treat all the areas that the council would like to. GET INVOLVED WITH YOUR COUNTY GOVERNMENT...

What are all the wire cages we see in parts of the lake? (2014)

These are cages that enclose new native plants. They are monitored to see how well they reproduce and survive the weather and animals. Some cages in the future will be opened up to see the effect of fish, turtles and other animals on the crop. This is an ongoing effort with North Carolina Wildlife, the Lake Gaston Weed Control Council and the Lake Gaston Association. We are careful not to put certain plants close to any property owners locations. These sites will be enlarged or additional ones added in coming years. If a private owner wishes to have some of these plants they can request it thru the Lake Gaston Weed Control Council.

I have Water Willow on my shoreline, can I remove it? (2015)

The answer is yes and no. Clarification: Water Willow is a protected species on the lake by Dominion Power. Therefore you need their permission to remove it. You should review the Shoreline Protection Plan on Dominions website for further information. Without their permission the answer is "no".

What is Lyngbya? (December 2021)

Filamentous, Cyanobacteria (Blue/Green Alga) • Native • But, Behaving like an Invasive • Colder Winter Months – Benthic • Warmer Summer Months – Surface • Problematic throughout the Southeast

Total Survey Sites: 5,368 2020 Survey Results Lyngbya: 1,158 22% of all survey sites 30% of vegetated site. For updated information search annual lake survey on website for current year.

Lyngbya grows on the bottom and grows into thick mats of algae. It is very difficult to kill because of its structure of a hairy like covering.

For the last 5 years we have had 7 historical sites that have been treated and monitored for results. The results have varied. A new application process is being implemented in 2021 by Aqua Services, Inc. Will be increasing to 376 acres for treatment from 90 acres.

Will my area be treated for Lyngbya? (July 2022)

The Lake Gaston Weed Control Council has limited resources to treat the entire 1,300+infested acres of the lake. Based upon the results of the annual full lake survey in the months of Sept/Oct and the biomass survey areas. Currently 376 acres are identified for treatment. This is not likely to increase till all counties contribute their full amount of $116,000. (with full funding we could potentially increase the acreage to 496). The state of Virginia contributed $800,00.00 to the Lgwcc via Brunswick County, Va. The Lyngbya issue will not be resolved by the Lgwcc alone. Residents will have to provide private treatment in their areas not in current public treatment areas. We are trying to spread the public treatments around the various counties as much as possible. Homeowners are encouraged to contact one of the applicators. (see lgwcc webpage) Aqua Services, PLM.


This is an image of Lyngbya. It is green/black algae. It grows on the bottom in mats. In the heat of the summer when water is hot it expels columns upwards that form unsightly mats and smelly odors. Normally found in the coves on the lake is less than 10 feet of water.

How can you help!

The Lake Gaston Weed Control Council with its partners: Lake Gaston Association, NCSU, NCWildlife, Virginia Wildlife and Dominion Power sponsor three primary activities on the lake each year.

Full Lake Survey: Involves volunteers to help survey the entire lake. Aug/Sept/Oct. We ask for a minimum of 4 hours for a site. Check the LGA website and various newspapers for sign up dates.

Revegetation Program: Involves volunteers to build, repair exclousure cages to protect planted native plants. It takes place each June for a week. There are areas across the entire lake. Volunteers can be anyone. Students who need community hours are welcome. Look for notices in the newspapers or go to the LGA webpage to volunteer.

New efforts by the Lake Gaston Weed Control Council to improve fishing opportunities

Fish Attractors

The Lgwcc is supporting a new program created by NCSU and NCWildlife. They have created “fish attractors” that can be inserted into the water with a built in structure to protect small fish from predators. The first 3 were put in the lake in 2021 and 2 will be put in during 2022.

How are decisions made for treatments on the lake

The process follows one that was created decades ago, and some changes made in subsequent years.

The Lake Gaston Weed Control Council (lgwcc) is the entity that collects funds, distributes funds and approves the plan for treatment each year.

NCSU with Lake Manager Jessica Baumann shares the survey results with the TAG. (technical advisory group). They determine the best plan for the next year. (January of each year)

NCSU presents the plan to the Pete Deschenes Stakeholders Board, which is chaired by Pete Deschenes. Stakeholders are made up of representatives from each county, business leaders, LGA, HOA organizations and others. The plan is approved as is or with changes to be presented to the Lgwcc. (February each year)

The Lake Gaston Weed Control Council receives the plan and approves as is or with changes. ( March of each year).

Plan given to NCSU Lake Manager Jessica Baumann for implementation.

Contact Info

Lake Gaston Weed Control Council
Jeff Zimmer
Treasurer of LGWCC

Phone: Wally Sayko: (434) 774-0715

Report Issues with Aquatic Plants on Lake Gaston

To report aquatic plant issues on Lake Gaston, please fill in the following form:


Be Aware...

It is "illegal" to take by any method Grass Carp from Lake Gaston in both Virginia and North Carolina. It is also "illegal" to be in possession of Grass Carp on Lake Gaston in both Virginia and North Carolina.