Is Oyster Bay, NY tap water safe?

Data: U.S. EPA · How we read the data · How we check it

No federal limits exceeded in EPA data for Jericho Water District. 5 PFAS were detected below the limits.

10 public water systems serve parts of Oyster Bay. The largest, Jericho Water District, serves 58,000 people, and one system here had PFAS above a federal limit. Your water bill names your system.

Largest system

Jericho Water District

58,000 people · Groundwater · EPA ID NY2902831

PFAS	Highest average	Limit	Status
PFOA Not detected	–	4 ppt	Not detected
PFOS Not detected	–	4 ppt	Not detected
PFHxS Not detected	–	10 ppt	Not detected
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 2 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 1

Full Jericho Water District results

Across New York, 31 of 322 water systems EPA tested had PFAS above a 2024 federal limit, and 16 systems were above the lead action level in results from the last five years. New York results.

Oyster Bay homes and lead pipes

83%

of homes built before 1980 (New York 74%, US 50%)

16%

built before 1950 (New York 38%)

11%

of households rent (New York 46%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Oyster Bay town (tables B25034, B25003). Estimates for small places have a margin of error.

Which system serves your ZIP code

Based on the ZIP codes each system reported serving. Boundaries don't follow ZIP lines exactly, so your water bill is the final word.

System	ZIP codes in Oyster Bay
Jericho Water District 58,000 people	11545, 11547, 11548, 11568, 11579, 11709, 11732, 11753, 11791, 11797
South Farmingdale Water District 44,700 people	11714, 11735, 11758, 11762
Plainview Water District 34,000 people	11803, 11804
Locust Valley Water District 7,500 people	11560, 11765
Hicksville Water District 48,000 people	11801
Oyster Bay Water District 8,700 people	11771

Other water systems serving Oyster Bay

Hicksville Water District
48,000 people · Groundwater · New York · lists this city
No PFAS above limits
South Farmingdale Water District
44,700 people · Groundwater · New York · lists this city
No PFAS above limits
Massapequa Water District
43,000 people · Groundwater · New York · lists this city
No PFAS above limits
Plainview Water District
34,000 people · Groundwater · New York · lists this city
No PFAS above limitsAlso: 2 health-based violations since 2016
Bethpage Water District
33,000 people · Groundwater · New York · lists this city
No PFAS above limits
Oyster Bay Water District
8,700 people · Groundwater · New York · lists this city
No PFAS above limits

3 more systems

Locust Valley Water District
7,500 people · Groundwater · New York · lists this city
PFNA above limitAlso: PFAS Hazard Index above limit · PFHxS detected
Glenwood Water District
1,000 people · Purchased groundwater · New York · lists this city
Not in EPA's PFAS sample
Liberty Utilities New York – Mill Neck
280 people · Groundwater · New York · lists this city
Not in EPA's PFAS sample

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
North Hempstead 9 mi Water Authority of Western Nassau	Water Authority of Western Nassau	Above limit	1.4 ppb
Huntington 9 mi Suffolk County Water Authority	Suffolk County Water Authority	Above limit	1.25 ppb
Glen Cove 9 mi Glen Cove City Water System	Glen Cove City Water System	Above limit	3.9 ppb
Freeport 11 mi Village of Freeport	Village of Freeport	None above limits	3 ppb
Rockville Centre 12 mi Village of Rockville Centre	Village of Rockville Centre	None above limits	1 ppb
Hempstead 13 mi Liberty Utilities New York – Lynbrook	Liberty Utilities New York – Lynbrook	None above limits	5 ppb

Questions

Is Oyster Bay tap water safe to drink?

Jericho Water District had 1 health-based violation since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Oyster Bay, NY?

10 public water systems serve parts of Oyster Bay. The largest is Jericho Water District (58,000 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Oyster Bay tap water have PFAS?

Jericho Water District had 5 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Oyster Bay homes have lead pipes?

Census estimates put 83% of Oyster Bay homes as built before 1980 (New York: 74%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Jericho Water District's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.