Irrigation Well vs. Municipal Water on Long Island: Is Drilling a Well Worth It for Your Lawn?

If you run an irrigation system on Long Island, you already know the feeling. Summer arrives, the lawn needs water, and your municipal water bill quietly doubles — or triples. By September, you've spent hundreds of dollars, sometimes over a thousand, watering grass and landscaping that drew from the same metered supply you use for drinking, cooking, and bathing.

Here's what a growing number of Long Island homeowners have figured out: there's a better way. An irrigation well — a dedicated well drilled specifically to supply your sprinkler system with groundwater — can eliminate municipal water charges for outdoor irrigation entirely, delivering a return on investment that typically pays off within just a few years.

But is it the right move for your property? This guide breaks down exactly how irrigation wells work on Long Island, what they cost, what you'll save, how fast you'll recoup your investment, and everything you need to know before making the call.

What Is an Irrigation Well?

An irrigation well is a drilled well that taps into Long Island's underground aquifer system to supply water exclusively for outdoor use — sprinkler systems, drip irrigation, garden watering, and similar applications. It operates completely independently of your municipal water supply, drawing groundwater directly and delivering it to your irrigation system through a dedicated pump and pressure system.

Because irrigation water doesn't need to meet drinking water standards, irrigation wells on Long Island typically target the Upper Glacial aquifer — the shallowest of Long Island's three major aquifers — at depths generally ranging from 50 to 100 feet depending on your location and local groundwater conditions. This shallower target depth makes irrigation wells more affordable to drill than drinking water wells, which typically need to reach the deeper Magothy aquifer.

The setup is straightforward: a submersible pump draws water from the well, a pressure tank and control system manage the flow, and the system connects directly to your existing irrigation lines. Once installed, you turn on your sprinklers and the meter stops running.

The Real Cost of Watering Your Lawn With Municipal Water on Long Island

Before comparing costs, it helps to understand exactly what you're paying now.

Long Island's water rates vary significantly depending on your provider — and many homeowners are paying more than they realize, especially during irrigation season.

What Long Island homeowners actually pay:

Water rates across the island range widely. The annual cost of municipal water for a typical Long Island residential customer varies from as low as $148 in some districts to over $1,100 in others, with the average Suffolk County Water Authority customer paying around $355 per year including service charges. However, those averages are based on typical residential use — not heavy summer irrigation use.

Most water districts on Long Island use tiered or conservation pricing, meaning the more water you use, the higher your per-gallon rate. Jericho Water District, for example, charges $1.30 per 1,000 gallons up to a threshold, with rates climbing to $3.90 per 1,000 gallons at high usage volumes. Customers of Liberty Utilities in Nassau County tend to pay among the highest rates on the island — the average Liberty customer in the Sea Cliff district used roughly 95,800 gallons annually at a cost of about $1,340.

The math on irrigation:

A typical Long Island lawn irrigation system running two to three times per week during a 20-week summer season uses somewhere between 30,000 and 80,000 gallons of water — depending on lawn size, system design, and local rainfall. At SCWA rates, 50,000 gallons of irrigation water costs roughly $400 to $600 per season. At Liberty or higher-rate district rates, that same irrigation load can easily reach $700 to $1,200+ per season.

And rates keep rising. Liberty Utilities customers in Nassau County saw a cumulative rate increase of 34.2% go into effect in August 2024 — a reminder that municipal water costs are a moving target that trends in one direction over time.

The bottom line: if you're spending $400–$1,200 or more per summer running your sprinkler system on municipal water, an irrigation well has a compelling financial case.

How Much Does an Irrigation Well Cost on Long Island?

The total cost of an irrigation well installation on Long Island typically falls in the range of $7,000 to $15,000 for a complete system — including drilling, casing, pump, pressure tank, and connection to your existing irrigation system.

Here's how the cost breaks down:

Drilling: The drilling component is priced per foot. On Long Island, irrigation wells typically reach depths of 50 to 100 feet targeting the Upper Glacial aquifer, making them significantly less expensive to drill than deep drinking water wells. Rotary drilling in Long Island's sandy soils is generally efficient, keeping drilling costs manageable.

Pump and Pressure System: A submersible pump, pressure tank, and control box are installed to deliver water from the well to your irrigation system at consistent pressure. Pump sizing depends on your irrigation system's demand — a larger lawn with more irrigation zones requires more pump capacity.

Connection to Existing Irrigation: Your contractor connects the well system to your existing irrigation lines, typically adding a backflow preventer and the plumbing necessary to route well water to your sprinkler controller.

Permitting: All water well drilling on Long Island requires regulatory compliance under NYSDEC and county health department requirements. Your contractor handles permit applications as part of the project. Permit fees are generally included in total project costs.

What affects your specific cost:

• Depth required to reach adequate groundwater yield at your property

• Soil conditions encountered during drilling

• Your irrigation system's flow demand (gallons per minute)

• Site accessibility for drilling equipment

• Your specific town or village's permit requirements

One important note: Get quotes that include everything — drilling, pump, pressure tank, piping, and permits. A "low" quote that covers only drilling and excludes pump installation can be misleading when you see the total.

Water Restrictions: A Factor That's Easy to Underestimate

One of the less-discussed advantages of an irrigation well is freedom from water use restrictions.

Long Island periodically experiences drought conditions — and when they hit, many municipal water districts implement mandatory or voluntary outdoor water use restrictions. These restrictions apply to municipal customers, not to property owners drawing from their own private wells.

If you've invested in professional landscaping, lawn care, or garden plantings that need consistent watering to thrive, having that supply cut off or restricted mid-summer by a drought advisory is a real problem. An irrigation well puts you in control regardless of external conditions.

Is Your Property Right for an Irrigation Well?

Not every Long Island property is equally suited for an irrigation well. Here are the key factors to evaluate:

Groundwater availability at your location: Long Island's Upper Glacial aquifer is generally present and accessible throughout Nassau and Suffolk Counties, but yield varies by location. Areas with coarser, sandier soils typically yield more water than areas with finer, silty materials. An experienced local driller can advise on expected yield at your specific property.

Lot size and setback requirements: Well drilling requires adequate setback distances from septic systems, cesspools, property lines, and other wells per NYSDEC and county health department regulations. On smaller suburban lots, confirming that a compliant well location exists is an important first step.

Existing contamination history: Because irrigation wells draw from the shallow Upper Glacial aquifer, they are more susceptible to surface contamination than deeper drinking water wells. If your property or the surrounding area has a history of oil tank contamination, industrial activity, or agricultural chemical use, a groundwater assessment before drilling is advisable. Eastern Environmental Solutions can evaluate your site's environmental history as part of our pre-drilling assessment.

Your irrigation demand: Irrigation wells are sized to match the flow demand of your system — measured in gallons per minute (GPM). A larger lawn with more irrigation zones requires higher yield and a more powerful pump. Your contractor will assess your irrigation system's demand and confirm that the planned well can supply it adequately.

Municipal water costs in your district: The higher your current municipal water rates, the faster an irrigation well pays off. Homeowners in Liberty Utilities territory or other higher-rate districts see faster returns than those in lower-rate districts. Knowing your specific per-gallon rate helps accurately project your payback timeline.

The Irrigation Well Drilling Process on Long Island

Here's what to expect when you move forward with an irrigation well installation:

Site Assessment Your contractor evaluates the proposed well location, confirms adequate setback distances, and assesses site accessibility for drilling equipment.

Permitting NYSDEC registration for the contractor and required county health department notifications or permits are handled before drilling begins. For Long Island wells specifically, a Preliminary Report of Proposed Well is filed with NYSDEC Region 1 in Stony Brook.

Drilling The well is drilled using rotary methods appropriate for Long Island's sandy soils. Drilling an irrigation well at typical Long Island depths is generally completed in a single day.

Casing and Development Steel or PVC casing is installed and grouted per state standards. The well is developed — pumped and surged — to maximize yield and clear drilling sediment from the formation.

Pump and System Installation A submersible pump, pressure tank, and control system are installed and connected to your irrigation lines. Your contractor tests the system, confirms adequate flow rates, and adjusts the pump settings for your system's demand.

Well Completion Report A Long Island Well Completion Report is filed with NYSDEC Region 1 upon project completion. A copy is provided to you — keep it as documentation of the well.

Timeline: Most residential irrigation well installations are completed within a few days once permitting is in order, though the full process from initial inquiry to completed installation typically takes two to four weeks.

Why Eastern Environmental Solutions for Your Long Island Irrigation Well

Eastern Environmental Solutions brings over 21 years of drilling experience on Long Island to every irrigation well project. Unlike residential-only well drillers, we are a full-service environmental contractor — which means we bring a level of technical depth and site understanding that goes beyond standard well installation.

What sets us apart:

• Deep knowledge of Long Island's aquifer system across Nassau and Suffolk Counties

• Geoprobe® fleet for pre-drilling groundwater assessment when needed

• Full site evaluation including environmental history review

• Complete installation — drilling, pump, pressure system, irrigation connection, and permitting

• All work performed by NYSDEC-registered water well contractors

• 24/7 availability for service and emergency response

Whether your property is in Manorville or Massapequa, Riverhead or Rockville Centre, we can assess your site, advise on expected yield, and deliver a complete irrigation well installation that starts saving you money from day one.

📞 Ready to stop paying for every sprinkler cycle? Call Eastern Environmental Solutions at (631) 727-2700 for a free irrigation well consultation. Or request a quote online. Available 24/7.

Frequently Asked Questions: Irrigation Wells on Long Island

Can I use an irrigation well for drinking water too? Irrigation wells are designed and permitted for non-potable outdoor use only. They are not held to the same construction standards as drinking water wells and typically draw from the shallower Upper Glacial aquifer, which is more susceptible to contamination. If you want a well for both irrigation and drinking water, a deeper, potable-standard well is the appropriate solution.

Will an irrigation well affect my neighbors' wells? For residential irrigation wells drawing modest volumes, impact on neighboring wells is extremely unlikely given Long Island's highly productive aquifer system. Large-scale high-volume withdrawals require more careful assessment, but standard residential irrigation wells do not create this concern.

How much water can an irrigation well supply? Typical residential irrigation wells on Long Island yield between 10 and 30+ gallons per minute — more than sufficient for most residential sprinkler systems, which typically require 8–15 GPM at peak demand. Your contractor will confirm adequate yield during installation.

Do I need to treat or filter the irrigation well water? For sprinkler irrigation, no treatment is required. Groundwater drawn from the Upper Glacial aquifer is adequate for lawn and landscape irrigation without filtration. If you want to use it for vegetable gardens, a basic water quality test is advisable.

Will my irrigation well require maintenance? Yes — minimal but important. An annual pump inspection is recommended to confirm the pump is operating efficiently. Pump components have a typical service life of 10–15 years. Well casings and screens should be inspected periodically. Total annual maintenance costs for a residential irrigation well are typically modest, especially compared to the water costs being avoided.

What happens to my irrigation well in winter? Irrigation systems on Long Island are winterized each fall — and the well pump system follows the same process. Proper winterization protects the pump and pressure tank from freeze damage and is standard practice for any irrigation contractor servicing Long Island systems.

Eastern Environmental Solutions, Inc. — 258 Line Road, Manorville, NY 11949 | (631) 727-2700 | easternenviro.com Serving Long Island, Nassau County, Suffolk County, NYC, New Jersey & Upstate New York