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Almost sunset - Photo courtesy of Don Yurewicz
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Photo courtesy of Tom Gross

2023 Kickoff Meeting

Saturday, June 24

10AM via ZOOM

All who may be interested in joining the

AIS Patrol are welcome!

If you are new please contact

Maria Gross or Don Yurewicz

Maria at

603-491-3107 (cell) or 603-447-6068 (home)

Don at or 713-253-1211 (cell)

Aquatic Invasive Species Patrol

Photo credit: Don Yurewicz


The Aquatic Invasive Species (AIS) Patrol is a group of volunteers who monitor Conway Lake in canoes, kayaks, on paddle boards, or even while swimming/ snorkeling, checking for the presence of invasive plants and animals.  Invasive species are primarily introduced to a lake by "hitching" a ride on boats and recreational gear and can appear anytime.  Early detection is critical -- once introduced, invasive species grow vigorously and spread rapidly (see photos below).  It is difficult and costly to control or eradicate most of these species once established.  Successful remediation of a new infestation is therefore dependent on early detection and action. 

We also monitor the lake for Cyanobacteria.  These microorganisms can produce neurotoxins and under the right conditions can flourish and  create blooms that can be a health hazard. To learn more about this threat click the Cyanobacteria link to the left.

Our goal is to collectively patrol the entire shoreline of Conway Lake twice a month for the duration of the growing season, usually July through September. Our volunteers are the "eyes" of Conway Lake and the more volunteers we have to monitor its 21 miles of shoreline, the less likely an invasive species will have a chance to become established.


Anybody can join and we will help you get started.  You’ll meet with an AIS member from our team to learn how we patrol and what to look for in the lake.  And we will provide guides to help you identify the plants and animals in the lake.  It’s a great way to enjoy Conway Lake and you can feel good about playing an important role in keeping the lake healthy.  Click the Training Overview link to the left for a quick overview of how we train our volunteers.

You can also learn more about us on the AIS Patrol Blog:  

( blog)  The Blog is where we post the results of our patrols on the lake and where you can find detailed descriptions of native and invasive species, and helpful reference guides.


To join or if you would like more information please contact either: 

Maria Gross:

603-491-3107 (cell) or 603-447-6068 (home)


Don Yurewicz:

713 253-1211 (cell)



LOOK at the Growth Difference Between INVASIVE and NATIVE Water-Milfoil !

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INVASIVE Variable Water-Milfoil from a Nearby Lake

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NATIVE Water-Milfoil in

Conway Lake

Our Mission

Learn as much as possible about NH's native and invasive aquatic plants & animals, regularly patrol Conway Lake in order to identify and immediately address potential threats, and teach our communities ways we can defend the lake together.  To meet these goals, we strive to:

  • Learn to identify all native flora and fauna of Conway Lake.

  • Patrol the assigned zone(s) every other week from the end of June to early-mid October

  • Be accountable and notify fellow patrollers if patrolling is not possible at any time.

  • Mark suspicious plants using weighted floating markers and obtain GPS coordinates.

  • Share all patrol findings and areas patrolled at  These patrols will be noted on a digital map of the lake to assure that all zones are covered.

  • Review patrol coverage in August and the end of September to assure that all zones are being checked.

  • Build awareness in the community by informing friends and neighbors about our efforts and the NH law to Clean-Drain-Dry ALL watercraft, trailers, live bait boxes, anchors, ropes, and fishing gear before launching into Conway Lake!

  • Attend relevant webinars offered by NH Lakes and Lake Stewards of Maine.

  • Aim to recruit one new patroller every season.

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