When is Wyman Lake closed for treatment?

Wyman Lake is closed for treatment on May 28, 2026.

When can I swim, boat, or fish after treatment?

Swimming, boating, and fishing are permitted again on May 29, 2026.

When can I resume irrigating from the lake?

Irrigation from Wyman Lake is allowed beginning August 29, 2026.

Public Hearing — Westminster (LNEO0520856)

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Affects:General PublicProperty Buyers

Wyman Lake in Westminster will be treated with the aquatic herbicide Sonar (fluridone) on May 28, 2026; recreational use resumes May 29 and irrigation use resumes August 29. The notice informs the public about temporary closures and reopenings.

Key Takeaways

Lake closed for herbicide treatment on May 28, 2026
Swimming, boating, fishing allowed again on May 29, 2026
Irrigation from lake permitted starting August 29, 2026
Treatment uses Sonar (fluridone), an aquatic herbicide
Public should avoid lake during closure

Published: May 19, 2026 · today
Category: Public Hearing
City: Westminster
Case #: LNEO0520856

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If you don't respond

If you ignore the closure, you risk exposure to the herbicide on May 28, 2026 and may be trespassing during the restricted period; recreational use is prohibited until May 29, 2026 and irrigation remains prohibited until August 29, 2026.

What to do next

1
Avoid the lake during treatment
Do not swim, boat, fish, or access Wyman Lake on May 28, 2026 to avoid herbicide exposure.
2
Resume recreational activities
You may return for swimming, boating, and fishing starting May 29, 2026.
3
Delay irrigation use
Do not use lake water for irrigation until August 29, 2026.

Frequently asked questions

When is Wyman Lake closed for treatment?: Wyman Lake is closed for treatment on May 28, 2026.
When can I swim, boat, or fish after treatment?: Swimming, boating, and fishing are permitted again on May 29, 2026.
When can I resume irrigating from the lake?: Irrigation from Wyman Lake is allowed beginning August 29, 2026.

The suggestions and answers above are AI-generated for general information only. They can be wrong, and we don't take responsibility for their accuracy. Talk to a qualified professional before acting on them.

Legal terms in this notice

Sonar (fluridone): A trade name for fluridone, a systemic aquatic herbicide used to control submerged weeds.

Full Notice Text

Wyman Lake Westminster MA
Wyman Lake will be closed for treatment with Sonar(fluridone), an aquatic herbicide, on 5/28.  It will re-open for swimming, boating, and fishing on 5/29; for irrigation on 8/29.
May 19, 20 2026
LNEO0520856