Nassau and Suffolk, including Fishers Island
Tap a service territory. The color is a modeled water bill at the usage you pick — the same gallons, the same 5/8-inch residential meter where the tariff names one. It is not a claim that private suppliers are always more expensive, and it is not your tax bill.
Like for like: the modeled water bill only. Fixed or minimum charges, usage blocks, and surcharges that are part of that water bill stay in the stack. A special-district property-tax levy is a district total. It is assessment-specific. This page never divides it by connections and never adds it to the meter.
Base Tariff Only (Riders & Local Taxes Extra — itemized separately, not summed into an uncertified single all-in invoice). Liberty’s PSC base charge is colored and listed. Percent riders, the Sea Cliff property-tax surcharge, and village gross-receipts tax are printed beside it. They are not mashed into one household total.
Each polygon is one community water system in the file, joined on the system id. A blank stretch of the island is uncolored. That means the layer has no polygon there, or the filter is hiding it. It does not mean the water is free.
Bars are the modeled water bill: fixed or minimum, then usage, then surcharges that belong in that bill. A hatched note means property tax is outside the bar. Partial tariffs and missing fees are listed under the bars and are not ranked as cheap. Liberty’s base tariff uses the same scale and is not given a rank.
These cards put named suppliers next to each other at the usage above. A lower meter in a commissioner district is not an all-in household savings. The district may also levy a property tax this page does not assign to a house.
Hold the posted tariff for twelve months. Split the year into the snapshot’s summer-weighted quarters, then into the supplier’s real billing cycle. Sum the cycle charges. Round the year to the cent. This is an estimate from a public tariff, not a quote for an address and not a utility’s rounded invoice.
The worked example loads with the tariff file.
At 100,000 gallons the quarters are 16,000, 26,000, 40,000 and 18,000. At 50,000 they are 11,000, 13,000, 15,000 and 11,000. At 180,000 they are 18,000, 48,000, 92,000 and 22,000. Any other total keeps those shares and puts the rounding gallon in July–September. Monthly tariffs, including Liberty, price three equal months inside each quarter. Four-month bills use January–April, May–August and September–December. Six-month bills use January–June and July–December. A real read date can move a tier. This model does not know your read date.
One CCF is 748.052 gallons in this file, the exact cubic-foot factor the research snapshot uses. SCWA’s own page, rechecked November 6, 2026, America/New_York, tells customers that 1 CCF = 748 gallons and that 120 CCF is 89,760 gallons. The model still converts at 748.052 because the billed unit is the CCF, and the snapshot said so. It does not silently switch to 748.
A minimum that includes gallons is the whole charge until those gallons are used up. The gallons inside the minimum are not billed again. A minimum floor, as in East Williston, is the higher of the minimum and the tier math, not both.
Left out on purpose: sewer, irrigation-only accounts, emergency or storm fees, private wells, hydrant charges, and any property tax whose parcel formula is not in the file. A missing fee that the source says is mandatory but does not price is a partial record. That system is not ranked.
These are adopted budget lines, not a house’s school-style tax. Bethpage and Hicksville show the Town of Hempstead portion only. Where the levy cell says Unknown, nobody filled in zero.
| District | 2026 levy | What the line covers | Connections | Levy ÷ connections | Water bill |
|---|
The JSON is the tariff input. The GeoJSON is the map. The CSV is the model output at 50,000, 100,000 and 180,000 gallons, including rows that are not comparable. Blank bill cells are empty, not zero.
Four Liberty rows are one company and separate rate territories. A system with no posted schedule stays in the list with the price left blank.
| System | Status | Water bill | $ / 1,000 | Cycle | 2026 levy | Boundary | Sources |
|---|
The join audit loads with the two files.
| Check | Result |
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PSC leaves and the effective surcharge statements, authority rate sheets, district pages, and adopted town budgets. The date on each note is when the file was read. The rate year is whatever the sheet itself says. Third-party water-cost websites are not the authority.
The rate file did not load. Refresh the page. The map reads /data/li-water-rates-2026.json and /data/li-water-service-areas.geojson.