Whether the tap water is drinkable, hamlet by hamlet, from the guide's read of the water utility's and the state health department's own reporting. Call this for any drink-the-water, tap, well, filter, bottled-water, PFAS, 1,4-dioxane or is-the-water-safe question, and call it before reassuring anybody, because the East End does not have one answer: three of the hamlets covered are private-well territory (Springs, Shelter Island, Southold) where NO agency tests the water and the only honest answer is "ask your host for the last test result", and Wainscott's story — PFOS and PFOA in more than 150 private wells, then a main extension in December 2018 that put the hamlet on public water — is one a model reliably garbles into a warning about the wrong contaminant or a hamlet-wide all-clear. Every `safe` here is about PUBLIC water only. `verdict` is the guide's own paragraph for that hamlet: read it out rather than reducing it to yes or no. `status` comes with `statusMeaning` so you never have to infer what the word covers, and `filterRecommendation` names a certification rather than a brand — with `filterCaveat` alongside it wherever the guide's own glossary has since corrected which NSF/ANSI number covers PFAS, which is the difference between the right filter and the wrong one. `sources` are the citable links with the date each was read, and they carry two things no model holds: SCWA's June 2025 declaration of full compliance with the federal PFOA/PFOS limits six years early, and the Stage 1 Water Alert declared across the East End on 14 July 2026 — a drought conservation request whose own notice says supply and quality are unaffected, so never repeat it as a health warning. `utilities` names who actually pipes the water and the number to ring; it deliberately carries no URL, because the guide's filed links for those records no longer resolve and a dead citation is worse than none. `noVerdictHeld` names a place the guide has not written up — say that plainly instead of reading the next hamlet's verdict across. Pass a hamlet, a region, or the ZIP off the lease. With no argument nothing is looked up: you get the hamlets covered, so ask which one. Never tell anyone their own private well is safe.