Is South Hempstead, NY tap water safe?
The short answer
1 of the 3 utilities serving South Hempstead has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and New York’s records: Liberty Utilities New York - Lynbrook.
Hempstead (V), which serves the most people here, has 1 result above EPA’s new limit, which takes effect in 2029 and 1 result above the health goal. The worst: PFOS at 4.7 ppt, above EPA’s new limit, which takes effect in 2029.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in South Hempstead’s ZIP codes, from EPA’s estimates.
- Open report
Hempstead (V)
New York · serves 56,000 people · about 6,500 in South Hempstead
1 result above EPA’s new limit, which takes effect in 2029 and 1 result above the health goal. The worst: PFOS at 4.7 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Rockville Centre (V)
New York · serves 24,700 people · about 630 in South Hempstead
3 results above the health goal. The worst: Lead at 1.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Liberty Utilities New York - Lynbrook
New York · serves 220,000 people · under 100 in South Hempstead
1 result above EPA’s new limit, which takes effect in 2029 and 3 results above the health goal. The worst: PFOS at 5.1 ppt, above EPA’s new limit, which takes effect in 2029.
5 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Hempstead (V)’s water, which serves the most people here. Another utility’s report names what handles its own results.
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ZeroWater 10 Cup Pitcher (ZP-010)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53checked Oct. 4, 2026
Certified for: PFOS
Aquasana Claryum Direct Connect (AQ-MF-1)
Under-sink carbon
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: PFOS
Express Water StreamLine Direct Connect System (USC001)
Under-sink carbon
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: PFOS
Water testing near South Hempstead
The 3 labs New York certifies closest to South Hempstead, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Nassau County Dept of Health
Hempstead, NY · about 1 mile
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
EMSL Analytical, Inc.
Carle Place, NY · about 5 miles
Certified for bacteria, lead and copper, asbestos
NY Environmental and Analytical Labs Inc.
Port Washington, NY · about 11 miles
Certified for bacteria, lead and copper
Which ZIP codes are in South Hempstead: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: NYS Environmental Laboratory Approval Program (ELAP), drinking water labs, as listed in TNI LAMS; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near South Hempstead
Other towns in Nassau County with a page of their own.
What to do next
- Read Hempstead (V)’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOSRanked by certification and what they cost over five years.The best water filters for PFAS, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water