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The Board of Health unanimously voted 4-0 to extend the moratorium on septic-system nitrogen loading credit variances from September 18 through November 11, 2025. The extension provides time to draft, legally review, and publicly consider proposed regulations that would apply the stricter Nantucket Harbor and Madaket Harbor standards to the Hummock Pond and wellhead protection districts.
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The moratorium continues to pause certain septic-system nitrogen credit variances in two protection districts. Proposed rules would require nitrogen-reducing system upgrades when properties are sold, systems fail, or new construction occurs, and would eliminate extra-bedroom credits in those districts. The Board scheduled a public hearing and possible final vote for November 20, 2025, after required newspaper notices.
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