A Manhasset home on Manhasset-Lakeville Water District service that uses 36,000 gallons in a four-month billing period pays $48.60 for that water. At 36,001 gallons, the bill is about $61.20. One extra gallon adds roughly $12.60, because the district bills every gallon at the highest rate the household reaches.
The district states the rule directly on its rate schedule. Its rates are "not intended to be a blend of rates for different levels of consumption." Instead, each customer "pays for all gallons consumed at the highest rate applicable under the foregoing table, based upon the total consumption." Water bills in most places rise gradually with use. In this district the bill climbs in steps, and on a large lot the sprinkler system usually decides which step the house lands on.
The gallon that reprices the bill
The Manhasset-Lakeville Water District's posted rate schedule, as it reads in October 2026, calls its pricing "Conservation Driven Block Rates." Residential consumption is measured over four-month periods. Applied to the tier boundaries, the schedule produces these bills:
| Four-month use | Rate applied to every gallon | Water charge |
|---|---|---|
| Up to 8,000 gallons | Minimum | $10.80 |
| 36,000 gallons | $1.35 per 1,000 | $48.60 |
| 36,001 gallons | $1.70 per 1,000 | about $61.20 |
| 72,000 gallons | $1.70 per 1,000 | $122.40 |
| 72,001 gallons | $2.65 per 1,000 | about $190.80 |
| 216,000 gallons | $2.65 per 1,000 | $572.40 |
| Over 216,001 gallons | Commercial rate | Commercial schedule |
The second step is the steep one. Moving from 72,000 to 72,001 gallons adds roughly $68 to a single bill. Above 216,001 gallons, a residential account moves onto the commercial schedule. That schedule is billed monthly and tops out at $4.40 per 1,000 gallons for the largest users.
The design is deliberate. The district's superintendent, Paul Schrader, told the Long Island Press that the tiers charge more for higher use in order to promote conservation. Other districts on the North Shore price water differently. The Water Authority of Great Neck North bills residential accounts quarterly. Its minimum charge includes 10 CCF, and all use above that is billed at one per-CCF rate, set at $5.66 for 2026. Its schedule has no tiers. Two houses with similar habits can end up with differently shaped bills depending on which side of a district line they sit.
Why a 2025 billing change moved some homes up a tier
A tiered system rewards keeping consumption split across accounts, and until early 2025 some larger Manhasset properties did that. They had separate water services for household use and for irrigation, and each service was billed on its own. The Long Island Press reported in March 2025 that the district had combined those accounts into one bill. New billing software made it possible to put several accounts at one location on a single bill.
The paper's example shows the effect. Fifty thousand gallons on one combined bill is charged at $1.70 per 1,000, or $85. Split into 15,000 domestic gallons and 35,000 irrigation gallons on two bills, both stay at $1.35, for $67.50 in total. Mr. Schrader described the old arrangement as an inequity that let "the larger residential property owners to pay less for the same amount of water." He also said most homes in the district already had a single service covering both uses. One longtime customer told the Press that the change came without warning and called it a "hidden price increase."
This matters to a buyer reading a seller's bills. A property that once had a separate irrigation account may have a cost history from before 2025 that no longer reflects what it pays. Under a combined bill, lawn watering and household use count toward the same threshold.
Where the lawn enters the math
The district names lawn sprinkling as "the leading non-essential water use." Its conservation rules apply to every irrigated property:
- Odd-numbered houses may water on odd-numbered days, and even-numbered houses on even-numbered days.
- No sprinkling is allowed between 10:00 a.m. and 4:00 p.m.
- Rain sensors or moisture gauges are required on all automatic systems and must be able to shut the system off when it rains.
The district's irrigation page warns that sprinkler use can produce high consumption. It suggests reading the meter before and after a typical watering cycle to see what one cycle uses. On a property near the 36,000 or 72,000 gallon line, that reading shows how many cycles fit in a billing period before every gallon moves to the next rate. Mr. Schrader's own suggestions in the Long Island Press were watering every other day, adding a rain sensor and installing a smart irrigation controller.
The share of the cost the meter never shows
The quarterly or four-month bill shows only part of what a property pays for water. The district's adopted 2026 budget projects $12,347,559 in expenses. It raises $4,169,749 through the property tax levy, about a third of the total, and budgets about $5.84 million from water sales and service charges, a little under half. The 2025 budget had the same split. Its levy was $4,061,656 against $11,984,934 in expenses.
The district's 2025 water quality report shows the size of that hidden share. The average cost of water in 2025 was $2.53 per 1,000 gallons, and district property owners also contributed $4,061,630 in property taxes. The Village of Plandome, which does not pay district property taxes, was charged $5.69 per 1,000 gallons that year. The gap between those two per-gallon figures is roughly what the tax levy pays for. For a homeowner, the full cost of water is the bill plus the district's share of the property tax bill. A low bill on a small lot still carries the tax share, and a large irrigated lot pays both.
What the capital work adds
Recent board decisions show that both of those funding sources will be paying for new treatment projects. According to the district's 2025 water quality report, advanced oxidation plants at the Shelter Rock and Searingtown sites are meant to remove 1,4-dioxane from three wells, with two earlier grants totaling more than $16 million. A separate grant covers 60 percent of the roughly $3 million cost of a GAC treatment project at the Campbell site. The report says new GAC vessels were installed at the Eden site in 2025, and that a PFAS treatment plant at Campbell Well No. 1 was bid, awarded and under construction.
At its July 21, 2026 meeting, the board approved spending of up to $7.121 million for PFAS treatment at the Gracefield Well and up to $5.66 million for emerging-contaminant removal at Campbell Well No. 2. It also authorized state WIIA grant applications for both projects, due July 27, 2026. Those were applications, not awards. The same minutes report that the Shelter Rock plant's sewer contract was under review by Nassau County and that the Searingtown plant was awaiting final state health approvals.
The district says this work is paid for through bonds, capital funds and grants, and that it is pursuing legal action against chemical manufacturers. Board minutes from September 4, 2025 record a $1.55 million transfer tied to the district's 3M PFAS settlement payment. The posted rate schedule does not show an effective date. When a buyer estimates future water costs, the current tier table is the place to start, but it may not be the price for the whole time they own the house.
Reading a Manhasset property's water costs before you commit
For a home in the district, the useful questions are specific to the property:
- Ask for recent bills, dated after March 2025. Bills from after the account consolidation show household and irrigation use together, which is how the property is billed today.
- Find each summer period's total gallons. A bill that lands just above 36,000 or 72,000 gallons is priced very differently from one just below, and the irrigation schedule usually decides which.
- Check the irrigation system against district rules. Automatic systems must have a rain sensor or moisture gauge that can shut them off when it rains.
- Budget for the start-up fee. The district's rate page lists a $100 new account set-up fee.
- Count the property tax share. The district's portion of the property tax bill is part of the cost of water, even though it never appears on the water bill.
A few questions buyers ask
Is the pricing really all-or-nothing at each tier? Yes, for residential accounts. The district says each customer pays for every gallon at the highest rate that applies to the total use, and that the rates are not blended.
What happens to a very large estate's usage? Residential use above 216,001 gallons in a four-month period is billed on the commercial schedule. That schedule is monthly and its rates go up to $4.40 per 1,000 gallons.
Why does Plandome pay a different rate? The district's 2025 report says the Village of Plandome was charged $5.69 per 1,000 gallons because it does not contribute district property taxes, unlike district residents.
This post is general information about published rates and district rules, not legal, tax or financial advice. Please confirm the details for any specific property with the water district and the right professionals.
When a Manhasset home is on your shortlist, its utility history belongs in the analysis along with the asking price. Beth Catrone can help you gather the bills, read them against the district's tiers, and work out what a property will actually cost to own before you make an offer. Let's Connect.
