Thirty-six seasons. Then nothing.

Congress passes the Coastal Zone Management Act

States are asked to develop coastal management programs, with federal funding available.

The Village gets ahead of the State

Anticipating New York's own coastal legislation, Mamaroneck forms a 30-member Coastal Zone Management Committee of residents, chaired by the Mayor and Village Manager. A State grant funds a Phase One report, published January 1981.

A permanent Coastal Zone Management Commission

The Village passes a local law creating a standing commission charged with recommending actions to preserve the coastal zone. New York adopts its State Coastal Management Program the same year.

The Local Waterfront Revitalization Program recommends a Bti pilot

The Village's own adopted plan calls for review of mosquito control in tidal wetlands, and recommends a pilot program to test Bti, noting that biological control of larvae "may be both more effective and less environmentally harmful" than aerial pesticide spraying. It directs that the work be coordinated with the Westchester County Department of Health and the State Department of Environmental Conservation.

Adopted by the Board of Trustees in November 1984. Approved by the New York Secretary of State in May 1985. Concurred by the US Office of Ocean and Coastal Resource Management in August 1985.

The program is designed

Mosquito control is worked out during Harbor and Coastal Zone Management Commission discussions. Several of the residents involved still live in the Village.

The New York Times covers the pilot

An article headlined "Using Bacteria, Mamaroneck Begins to Triumph Over Mosquitos" describes the program and the areas where it worked.

The pilot becomes a permanent municipal program

Following evaluation of the pilot data, the Village upgrades to a full-scale program: Bti and methoprene applied to marshes, creek edges and catch basins. The Mayor at the time described it as launched with "the blessing of the County and the State," adding that the Village "wasn't required to respond but it seemed prudent."

The State Comptroller's Office would later describe this as "a practice which we understand the Village has undertaken since 1989."

West Nile virus arrives in the region

What began as a quality-of-life program acquires a public health rationale. This becomes a stated factor in continuing it through subsequent administrations.

Operating under State permits

The program runs under valid Department of Environmental Conservation permits. For roughly three decades Village staff complete the permit application and the private landowner signs as owner where required. The application form provides a box for "owner" and a box for "other."

A permit lapses, and the Village learns what happens

Village staff do not renew the permit covering larvicide treatment at Guion Creek and Otter Creek. An infestation follows. The Village responds with a one-time adulticide spray using a licensed professional.

Former Mayor, email to residents, July 29, 2026.

Treatment resumes at both creeks, every year

The Village retains licensed professionals to apply larvicide at Guion Creek and Otter Creek each season. No further widespread complaints are recorded. One of the licensed applicators is a Village police officer holding the certification.

The Village has also long sprayed Harbor Island Park ahead of the annual Fireman's Carnival.

Former Mayor, email to residents, July 29, 2026.

A one-time spray in response to complaints

Applicator records for this treatment were filed with the Village Manager's office.

A permitting question about Otter Creek

The Village applies for its permit as usual. For Otter Creek Preserve, the DEC advises that the landowner — the Westchester Land Trust — must be the applicant. The DEC indicates that copying the Land Trust serves as acknowledgment, and the Village proceeds with treatment as planned. Instructions are given for the following year.

This is the last season the program operates.

A new Village Manager is appointed

Kathleen Gill is appointed Village Manager. Within months, the larvicide program that had run every season since 1989 is not funded for the year ahead.

The Village Attorney writes to the State Comptroller

At 11:48am the Village Attorney sends an informal opinion request to the State Comptroller's local government unit and, in the same email, to the Attorney General's opinions office. It asks whether it is appropriate to apply Bti on private property in the Village absent a local board of health or health officer approval.

The letter states that the practice had been undertaken since 1989 and was "ceased last year upon a new Village administration deeming it inappropriate and without legal authority." It describes the program as "selective treatment of individual properties for spraying," asserts that "mosquito control measures can be taken by private property owners should they see fit," and closes by stating the author's own view that the practice was inappropriate.

Three features of the request matter. It cites the permissive word "may" in § 1500(1) as though permission were a prohibition. It relies on §§ 1501 and 1502, which operate only through a municipal board of health — the very body the Village says it does not have. And its reading of § 1502, that benefited landowners rather than the Village should bear the cost, is the reasoning that resurfaces in July as a proposal to spray private property and bill residents.

He forwards the request to the Mayor, Board, Village Manager, Assistant Village Manager and Clerk on July 14, 2026 — the day after telling the public the Village was waiting to hear back.

Village Attorney, Informal Opinion Request, April 6, 2026, forwarded July 14, 2026. Office of the State Comptroller, letter of July 16, 2026, recording receipt on April 6.

The Comptroller's Office answers: this is a local decision

The office reviews with the Village Attorney the factors that must be considered under Public Health Law Article 15, Title 1 — Municipal Insect Control — which sets out the authority of municipal boards of health over mosquito problems that range across both public and private land. It informs him that the determination must be made locally, and considers the matter closed.

No further written opinion is promised, because the law is already clear.

Office of the State Comptroller, Division of Legal Services, July 16, 2026.

A contract the Land Trust cannot sign

The Village proposes paying the Westchester Land Trust — but structures the agreement around the Land Trust providing "environmental education programming for Village camps or the Marine Education Center." The Land Trust is a land conservation organization with a modest staff and no such programming. It asks that the contract be revised to describe what is actually being funded: larvicide application. The Village declines to revise it.

The offer to pay is itself notable. If a legal barrier genuinely prevented the use of public funds here, there would be nothing to negotiate.

Village Statement Regarding Mosquito Concerns Near Otter Creek Preserve. Westchester Land Trust correspondence.

The Land Trust obtains its own permit

The Westchester Land Trust informs the Village that the DEC has issued it a permit to apply Bti at Otter Creek Preserve, with treatment expected in early July. It funds the work through private donations and states it does not have the budget to take this on regularly, but acts because of the severity of the situation.

The County asks for access, then does not follow up

The Westchester County Department of Health emails a resident requesting a phone number and address in order to view the problem area. She replies the same day. She hears nothing further.

Treatment begins at Otter Creek. The Village posts its statement.

The Land Trust's licensed applicator begins monitoring and applying Bti, with a second application on July 4 and monitoring reports on July 10, 15 and 22.

The same period, the Village posts the statement saying it is awaiting written guidance from the Comptroller — six weeks after that office told the Village Attorney the decision was the Village's to make.

Guion Creek is nobody's job

The Land Trust confirms it is not treating Guion Creek, which lies outside the preserve boundaries, and notes that "the original Village program included Guion Creek."

Westchester Land Trust, Vice President of Conservation, July 8, 2026.

A packed Board of Trustees meeting

Residents from Shore Acres, Lawn Terrace, Taylors Lane, Stuart Avenue and the Guion Creek area speak. Physicians describe the risks. Parents describe children requiring medical treatment for infected bites, including at least two on antibiotics and one who missed school with an eye swollen shut. Nobody speaks in favor of inaction.

The Village Manager states that the Village is waiting on written confirmation from the Comptroller, that she cannot share what was said verbally, but that it was clearly indicated the answer would be no. She tells the public the Village has the money and is ready to pay, but that the Land Trust will not sign.

Mayor Torres tells the meeting that the Board cannot act without a declaration of a public health emergency. The statute the Comptroller's Office had pointed the Village to two months earlier — Public Health Law Article 15, Title 1, Municipal Insect Control — sets the threshold at a breeding place that "constitutes a danger or injury to life or health," and requires no emergency declaration of any kind.

A Land Trust board member, who is also a Village resident, testifies to clarify: the Land Trust is willing to apply larvicide and is not refusing to cooperate.

Seventy households sign in a single afternoon

A group letter goes to the Mayor, Board, Village Manager, Village Attorney and Committee for the Environment. It asks the plain questions: if the money is in the budget, why is larvicide not being applied at Guion Creek or in the catch basins? If the obstacle is personnel, will the Village license a staff member or hire a contractor?

The letter also raises a point that would dispose of the private-property question altogether: that Otter Creek has been deemed a navigable waterway, making the creek itself municipal property even though the Land Trust owns the surrounding preserve. ? (to be fact checked for accuracy)

A former Mayor proposes a permanent fix

A one-dollar seasonal lease between the Village and the Land Trust for mosquito abatement access, enacted by local law under Village Law § 4-412, would let the Village hold its own DEC permit as lessee and restore the program exactly as it operated. It costs nothing and burdens no one.

The proposal has not been taken up.

A records request is answered in sixteen minutes

A resident files a Freedom of Information request with the Village at 3:13pm and is told at 3:29pm that "the records sought cannot be found after a diligent search."

The statement comes down. No correction goes up.

The Village statement is removed from the website. No corrected statement is posted.

The same day, a resident is told that the DEC will not issue a permit to the Village, and that the Village has no board of health because that authority lies with Westchester County.

Public Health Law § 302 is found

A resident locates the provision stating that in villages, the board of health is the board of trustees. The central deflection of the previous two months does not hold.

The same day, the Village Manager writes to the Land Trust still asserting that the Village cannot secure a permit and cannot reimburse because it is not a board of health, while proposing a "more generic agreement."

118 households petition Westchester County

A formal request goes to the County Health Commissioner asking for a public health nuisance assessment and determination under Public Health Law § 1305, with photographic evidence of infestation and of children's injuries — scarring, allergic reactions requiring steroids, bites that progressed to infection requiring weeks of antibiotics.

The Commissioner replies within three hours: the County will send an inspector.

The Land Trust also replies to the Village the same day, restating that it secured the permit, contracted a licensed applicator, began treatment on July 1, and remains open to a conversation about compensation, citing the Comptroller's letter.

The Mayor says the Village will treat public areas

Posted on social media over the weekend, with an official staff statement promised for Monday July 27.

No statement appears on July 27.

County inspectors arrive, unannounced

Two inspectors sample the marsh edges near Guion Creek. Residents had twice asked to be present and were not contacted; the inspectors are not accompanied by Village staff. A resident finds them by chance. Their method includes larval sampling and landing-rate counts.

West Nile virus is confirmed in Westchester

One of seven mosquito pools tested in the week of July 19–25 returns positive in Rye. The virus has also been detected in Greenwich, and earlier in the season in adjacent Rockland County. Statewide, 2026 saw the earliest positive confirmation in more than twenty years.

A former Mayor puts the history on the record

He confirms the 2018 permit lapse, the resulting infestation, the one-time spray, and that from 2019 through 2023 the Village retained licensed professionals to larvicide both Guion Creek and Otter Creek every year — with no further widespread complaints.

Two incompatible explanations for Guion Creek

The Village Manager states that to her knowledge Guion Creek was never treated with larvicide, and separately that Guion Creek is tidal so larvicide cannot remain in place long enough to be effective. The Land Trust and a former Mayor both say otherwise.

The Committee for the Environment drafts a resolution

It asks the Board to convene immediately and re-implement the program for the remainder of 2026 so far as reasonably practicable; to enter a memorandum of understanding reimbursing the Land Trust; and to appoint a task force of no more than seven — including Village management, the Committee, the Land Trust and residents — to report by January 31, 2027, with a program in place by March 31 and running by April 30, 2027.

The DEC issues the catch basin permit

The Village Manager reports that the permit has been received and that larvicide treatment of catch basins will begin Monday August 4 at 7:00am. This is the first Village-funded mosquito control work in two seasons.

The permit itself, DEC number AI-3-26-009, is broader than first described. Its authorized area is simply "catch basins" — with no geographic limit — it runs from August 1 through October 31, 2026, and it authorizes up to 1,300 briquets. Nothing in it covers Guion Creek or Otter Creek, but nothing in it confines catch basin treatment to one neighborhood either.

The Village Manager writes to residents

A short email states that the catch basins will be treated the following morning at 7am, and that "the contractor will evaluate whether Guion creek should be treated as well."

This is the first indication in five months that Guion Creek may be treated. As recently as July 30 the Village Manager had said that to her knowledge Guion had never been treated, and that it was tidal so larvicide could not remain in place long enough to work.

The email adds that "there is no consensus in the neighborhood as to spraying," that the County is inspecting the area and will make recommendations with a report expected shortly, and that regular updates will follow.

On the consensus point, the two requests at issue are distinct. Residents have asked for Bti larvicide at Guion Creek, Otter Creek and the catch basins, and that request is not in dispute among them — a member of the Shore Acres property owners' association wrote to the Village Manager on July 30 stating that members "do not need the spraying, we handle our own," and asking the Village to focus on Bti at those three locations. What residents have not requested, and have not agreed to, is chemical adulticide spraying of private yards.

Still unanswered: whether the existing DEC permit covers Guion Creek or a separate permit is required, and where reimbursement of the Westchester Land Trust stands.

Catch basin treatment begins, and it is not limited to Shore Acres

On Tuesday, August 4, 2026, the Village applies FourStar Briquets to catch basins under DEC permit AI-3-26-009. The contractor completes 127 catch basins in Shore Acres by that morning, and treats a further 150 basins elsewhere in the Village the same day:

The Village Manager writes that more basin dunks are being ordered so that further areas can be treated.

This is real progress and it deserves to be said plainly. It is the first mosquito control work funded and carried out by the Village in two seasons, and it extends well beyond the neighborhood that raised the issue. The permit authorizes up to 1,300 briquets and runs through October 31, so there is both headroom and time for the rest of the Village and for reapplication.

Guion Creek and Otter Creek remain outside this permit. Neither is a catch basin, and neither is covered.

The County's field report lands, and it corroborates residents

Westchester County's Department of Health issues its Field Activity Report on the July 27–28 inspection. It is the first independent government assessment of the problem, and its findings run in residents' favor on every contested point.

On severity: inspectors were driven out of Otter Creek Preserve, sustained numerous bites at every wetland site, and had adult mosquitoes enter their vehicle at each location. The report states these observations "are consistent with the nuisance complaints received from area residents."

On the catch basins: larvae in only one of sixteen inspected, and the report attributes the low count to residents having treated the basins themselves with Bti. The false negative is now in the official record.

On root causes: extensive Phragmites australis throughout the wetland, creating sheltered breeding and resting habitat.

Water samples from the wetland sites, Otter Creek and the Guion Creek tributary were submitted for dissolved oxygen, pH, sodium and chloride. Results were still pending at the time of the report.

A resident files a comprehensive records request

Cristina Lerchen files a Freedom of Information Law request covering every financial record tied to Department 4086, Insect Control, since January 2022 — ledgers, invoices, purchase orders, vendor payments, permits, and any mosquito-related spending charged to other budget lines. The request also asks specifically about David Ballone, a certified commercial pesticide applicator, addressing whether the Village has pursued in-house licensing.

The Village Clerk acknowledges the request the same day, assigns it number 10628, and states that a response is expected on or about September 1, 2026 — after both the Committee meeting on August 6 and the Board meeting on August 10.

Adult mosquitoes found in the basins, and the Village agrees to spray public land

The Village Manager writes at 10:30am that while applying larvicide to the catch basins the previous day, the contractor noticed adult mosquitoes present. In response, all 127 Shore Acres basins will be sprayed tonight and tomorrow.

The Village will also spray two stretches of street adjacent to Village-owned property, roughly 3,500 linear feet in total:

The product named is EVO VIA MT, described by the Village as a botanical insecticide. The Village states it will continue to monitor and determine whether additional spraying is needed.

This is the ask residents actually made. Adulticide applied by the Village, on Village-owned land and streets, at Village expense. It is the opposite of the July 28 proposal to spray private yards and bill residents for it, and it comes two days after residents were told there was "no consensus in the neighborhood as to spraying." The distinction was never about spraying. It was about whose property and whose bill.

Note what this does and does not do. Adulticide kills mosquitoes already flying. It does not stop breeding. Spraying the street alongside Guion Creek is not the same as larviciding the standing water in the creek margins, and that request remains open.

Worth obtaining: the product label and active ingredient for EVO VIA MT; the regulatory basis for street adulticiding, since DEC permit AI-3-26-009 covers larvicide in catch basins only; and confirmation that residents along the route receive advance notice before application.

Three Trustees are understood to support a 2027 program

As of today, residents understand that three of the five Trustees support a comprehensive plan for spring 2027, including Otter Creek. Three is a majority of the Board, which means the votes to restore the program exist.

Delivering it will require the Village, the Westchester Land Trust and the DEC to coordinate on a single plan, and the permits will need to be filed over the winter rather than in August.

This reflected residents' understanding rather than a written commitment. On August 10, Trustee DeRose put the substance in writing before the Board — but as of that meeting nothing had been adopted by resolution or recorded in a vote.

The Village reports what it has treated, and commits to a schedule

Village staff report that roughly 300 catch basins were treated with larvicide about a week and a half earlier, and that on the preceding Friday the contractor treated 127 catch basins in Shore Acres and the Taylors Lane area, along with the median on The Parkway and Guion Creek. The Village states this work addresses the violations described in the County notice, and that it will follow up with the County once backup documentation is received from the contractor.

Treatment is to be repeated every two weeks for the remainder of the season. This is the first time the Village has committed to a recurring schedule rather than a single application.

The Village also reports reaching out to the Cornell Cooperative Extension mosquito research program, which has offered to advise the Village free of charge for next season, with particular attention to Guion Creek as a tidal system. A work plan for 2027 and future years is to be submitted to the Board and the community for input in the coming weeks.

Figures here are drawn from the meeting audio and should be confirmed against the official minutes and the contractor's documentation. Note also that Guion Creek appears in this update for the first time — the basis for treating it, and whether it falls under DEC permit AI-3-26-009 or a separate authorization, has not been stated publicly.

Residents respond

David Freeman — Sandhu Drive, eighteen-year resident, environmental attorney, member and former chair of the Committee for the Environment — said most of his prepared remarks had been overtaken by Trustee DeRose's resolution and the Mayor's comments, and thanked both. He noted the Committee's long record of working with the Village Board on this issue: during his tenure as chair, the Committee received monthly reports on how the mosquito control program was being implemented. He offered the Committee's expertise and asked the Board to open a line of communication.

Soojin Park — twelve-year resident — thanked Trustee DeRose for a common-sense resolution and said she appreciated the Mayor's humility, but pressed further. She noted that a similar lapse had occurred once before under a new mayor who had not been properly briefed, and that that mayor immediately owned the mistake and asked how to fix it. This year the problem instead dragged on for months at real cost to residents in stress, uncertainty and volunteered time. She pointed out that while the Mayor is new, others on the Board are not — Trustee Kushnick previously headed the Committee for the Environment, and Deputy Mayor Lucas has served for many years — and urged the Board to draw on the historical knowledge already available to it. She emphasized that Mamaroneck is a three-and-a-half mile coastal community with two marshlands, that mosquito control is a matter of health, welfare and safety and not merely quality of life, and asked that the resolution be brought to a vote and made a standing annual budget item.

Dan Adler — The Parkway, recently moved to the Village — said his greatest frustration has been the difficulty of getting accurate information. Most of what he received was inaccurate, updates were not provided when circumstances changed, and the burden fell on residents to keep checking in. He objected to language framing the situation as a summer that had not been what residents hoped for, and to the suggestion that abatement is a nuisance falling to property owners to fund. He told the Board that the impression among residents is that the County forced the Village to act, rather than the Village responding to residents, and that this is not an impression the Board should want. He asked for a complete, holistic plan for 2027 that includes Otter Creek rather than another year of study, and said communication must improve.

The Village responded to this point directly, stating that its first actions were not prompted by the County — that the Village was already in process on the DEC application before the County conducted its two days of site visits and issued its notice.

Allison Stabile — Shore Acres — responded to the branding presentation given at the earlier work session, which had discussed recruiting volunteers and community ambassadors. Her point was that the Village already has both and is not engaging them. She noted that she came before the Board in March with 175 signatures from residents who had just learned the larvicide program would not run this year. She said she has never denigrated a staff member and would not; that she has volunteered in the Village for more than thirty years; and that she was among the first members of the Committee for the Environment when it was formed. Her message was that the historical knowledge the Board says it is missing is sitting in the room — it does not need to be purchased from a consultant, only asked for.

Summarized from the meeting audio, not a transcript. Speakers who wish their remarks corrected or expanded here should write to the address on the Take action page.

What has and has not happened

Treated: Otter Creek Preserve, by the Westchester Land Trust, at its own expense, from July 1. Two applications. Reimbursement still not agreed; the Land Trust last wrote to the Village on July 22 and is awaiting a reply.

Treated: 277 catch basins across Shore Acres, Harbor Heights, Rye Neck, Orienta and Heathcote, by the Village, from August 4. More dunks on order for further areas. The permit runs to October 31 and allows up to 1,300 briquets.

Treated: Guion Creek and the median on The Parkway, reported by the Village at the August 10 meeting. The permit basis for treating Guion Creek has not been stated publicly.

Committed at the August 10 meeting: Repeat treatment every two weeks for the remainder of the 2026 season. A budget increase from $20,000 to $30,000. A work plan for 2027 and future years to be brought to the Board and the community for input. Guidance from Cornell Cooperative Extension, free of charge, with particular attention to Guion Creek.

Introduced but not yet voted: Trustee DeRose's memo and resolutions, expected to return to the Board in September. Until there is a recorded vote, nothing in it binds the Village.

Pending: A comprehensive FOIL request (#10628) for insect control spending, due on or about September 1.

Not addressed: Reimbursement of the Land Trust. Correction of the public record, as requested by the Comptroller's Office on July 16. A recorded commitment for the 2027 season, where the insect control request currently stands 40 percent lower with the larvae control line at zero.