Babylon, NY · PWSID NY5110526
Suffolk County Water Authority lead service lines
11 lead or galvanized lines to replace
Suffolk County Water Authority reported 11 lead and 0 galvanized-requiring-replacement service lines out of 396,459 in its inventory. That's about 1 in 36,042 lines. Another 54 (<0.1%) are still listed as unknown material.
Ranks #266 of 490 New York systems with confirmed lead lines, and #4,388 nationally.
<0.1% of Suffolk County Water Authority's service lines are lead or galvanized requiring replacement. That's lower than the New York average (7.6%) and lower than the national average (3.1%).
- Lead <0.1%
- Galvanized (replace) 0%
- Unknown <0.1%
- Non-lead 100%
Total service lines reported: 396,459. Reported all required service line types. Population served: 1,100,000; 336,418 connections.
Lead test results
Suffolk County Water Authority's most recent 90th-percentile lead result (Jan 2025–Dec 2027) was 1.3 ppb, below both the 15 ppb action level and the 10 ppb level that takes effect in 2027. This means 90% of homes sampled were at or below that level; individual homes, especially those with lead lines, can be higher.
Lead and Copper Rule 90th-percentile results reported to EPA, in parts per billion. Dashed lines: 15 ppb action level and the 10 ppb level from November 1, 2027.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 11 in 2025 Q1 to 11 in 2026 Q3: no change. Lines of unknown material went from 54 to 54, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists no Lead and Copper Rule violations for Suffolk County Water Authority since 2015. That covers testing, reporting, corrosion control and public notice requirements; it isn't a guarantee about any individual home.
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
Suffolk County Water Authority's main water source is groundwater (wells). It sells water to 3 other water systems: St James Water District, Greenport Water District, Smithtown Water District.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line replaced
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Suffolk County Water Authority whether it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in Suffolk County
Cities served
- Lead pipes in Lindenhurst
- Lead pipes in Patchogue
- Lead pipes in Babylon
- Lead pipes in Lake Grove
- Lead pipes in Amityville
- Lead pipes in Port Jefferson
- Lead pipes in Northport
- Lead pipes in Southampton
- Lead pipes in Islandia
- Lead pipes in Lloyd Harbor
- Lead pipes in Brightwaters
- Lead pipes in Sag Harbor
- Lead pipes in Westhampton Beach
- Lead pipes in Bellport
- Lead pipes in Village of the Branch
- Lead pipes in Quogue
- Lead pipes in Nissequogue
- Lead pipes in East Hampton
- Lead pipes in Head of the Harbor
- Lead pipes in Huntington Bay
- Lead pipes in North Haven
ZIP codes served
ZIP codes whose center falls inside Suffolk County Water Authority's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
117011170311704117051170611713117151171611717117181171911720117211172211724117251172611727117291173011731117331173811739117411174211743117491175111752117541175511757117631176411766117671176811769117701177211776117771177811779117821178411786117871178811789117941179511796117981193211934119401194111942
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| South Huntington Water District | 0 | 460 |
| Greenlawn Water District | 0 | 806 |
| Riverhead Water District | 0 | 3,253 |
| Hampton Bays Water District | 0 | 382 |
| Greenport Water District | 0 | 805 |
| Saltaire Water District | 0 | 186 |
| West Gilgo Beach Association | 5 | 64 |
| Oak Beach Public Water Supply | 0 | 54 |
Check another water system
Questions
Does Suffolk County Water Authority have lead pipes?
Yes. Suffolk County Water Authority reported 11 lead service lines and 0 galvanized lines that must be replaced, out of 396,459 total. 54 more are of unknown material.
How do I check if my home's service line is lead?
Look up your address on Suffolk County Water Authority's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will Suffolk County Water Authority replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has Suffolk County Water Authority had lead violations?
EPA's data shows no Lead and Copper Rule violations since 2015 for Suffolk County Water Authority.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "Suffolk County Water Authority lead service lines," https://leadpipemap.com/ny/suffolk-county-water-authority/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.