Pool Leak Detection on Long Island

12 companies offering leak detection, each with a Nassau or Suffolk County license we checked on Sep 24, 2026.

About this service

Losing more water than evaporation explains usually means a leak in the shell, liner, plumbing or equipment. Leak specialists use pressure testing, dye testing and sometimes divers to pinpoint the source before repair.

Questions to ask before you hire

  • How do you test for leaks (pressure, dye, dive)?
  • Is the detection fee separate from the repair?
  • Can you repair what you find, or do you refer it out?
12 licensed companies

Advantage L.I.

Holbrook, NYServes Suffolk15+ years in business

License verified
  • Openings & closings
  • Heaters & heat pumps
  • Leak detection
  • New pool construction

Towns: Holbrook, Port Jefferson Station, Coram, Farmingville, Miller Place +4 more

All Island Group

Farmingdale, NYServes Nassau & Suffolk50+ years in business

License verifiedEmergency serviceRetail store
  • Weekly pool service
  • Openings & closings
  • Leak detection
  • New pool construction
  • Renovation & resurfacing

Towns: Dix Hills, Roslyn, Hewlett, Woodmere, Kings Point +5 more

Empire Pools, Inc.

Holbrook, NYServes Nassau & SuffolkEst. 1998

License verifiedPrices publishedOnline bookingEmergency service
  • Weekly pool service
  • Openings & closings
  • Liner replacement
  • Heaters & heat pumps
  • Salt water systems
  • Leak detection
  • +2 more

Towns: Amityville, Westbury, Baldwin, Miller Place, South Setauket

Pool openingfrom $285 + tax

Fresh Blue Pools

West Babylon, NYServes Nassau & Suffolk10+ years in business

License verified
  • Weekly pool service
  • Openings & closings
  • Salt water systems
  • Leak detection
  • Safety covers
  • Renovation & resurfacing

Towns: West Babylon

Majestic Pool Service

Bay Shore, NYServes Suffolk25+ years in business

License verifiedOnline booking
  • Weekly pool service
  • Openings & closings
  • Liner replacement
  • Heaters & heat pumps
  • Leak detection
  • Safety covers

Towns: Bay Shore, West Islip, Babylon, Lindenhurst, Deer Park +6 more

Marlin Pools, Inc.

Holbrook, NYServes Nassau & Suffolk30+ years in business

License verified
  • Weekly pool service
  • Openings & closings
  • Liner replacement
  • Heaters & heat pumps
  • Salt water systems
  • Leak detection
  • +3 more

Pools by Ricciardi and Son

Lindenhurst, NYServes Nassau & Suffolk35+ years in business

License verified
  • Weekly pool service
  • Openings & closings
  • Leak detection
  • New pool construction

Towns: Oceanside, Freeport, Merrick, Bellmore, Wantagh +15 more

Pro Tech Pools

Miller Place, NYServes Suffolk30+ years in business

License verifiedOnline booking
  • Weekly pool service
  • Openings & closings
  • Heaters & heat pumps
  • Salt water systems
  • Leak detection
  • Safety covers

Towns: Miller Place, Shoreham, Wading River, East Northport, Dix Hills +6 more

Sky Blue Pools

Deer Park, NYServes Nassau & SuffolkEst. 2004

License verified
  • Weekly pool service
  • Openings & closings
  • Liner replacement
  • Heaters & heat pumps
  • Leak detection
  • New pool construction
  • +1 more

Towns: Bayville, Oyster Bay, Mill Neck, Locust Valley, Glen Cove +15 more

Also confirm the county license is current before you sign. Every company above shows its license number and the date we checked it.

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