Is Dix Hills, NY tap water safe?
The short answer
1 of the 4 utilities serving Dix Hills 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: Suffolk County Water Authority.
South Huntington Water District, which serves the most people here, has 2 results above the health goal. The worst: Lead at 1.3 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
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 Dix Hills’s ZIP codes, from EPA’s estimates.
- Open report
South Huntington Water District
New York · serves 81,760 people · about 17,400 in Dix Hills
2 results above the health goal. The worst: Lead at 1.3 ppb, above the health goal.
No health-based violations since 2016
- Open report
Dix Hills Water District
New York · serves 34,522 people · about 14,500 in Dix Hills
2 results above the health goal. The worst: Arsenic at 0.91 ppb, above the health goal.
No health-based violations since 2016
- Open report
Suffolk County Water Authority
New York · serves 1.1 million people · about 10,100 in Dix Hills
2 results above EPA’s new limit, which takes effect in 2029 and 1 result above the health goal. The worst: PFOS at 17.4 ppt, above EPA’s new limit, which takes effect in 2029.
1 health-based violation since 2016
- Open report
Greenlawn Water District
New York · serves 42,000 people · about 780 in Dix Hills
2 results above the health goal. The worst: Lead at 1.0 ppb, above the health goal.
No 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 South Huntington Water District’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, Arsenic
Water testing near Dix Hills
The 3 labs New York certifies closest to Dix Hills, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Certified Laboratories LLC
Melville, NY · about 3 miles
Certified for bacteria
Pace Analytical Services, LLC - Melville, NY
Melville, NY · about 3 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Suffolk Co Public Env Health Lab
Hauppauge, NY · about 8 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, PFAS, radioactivity
ZIP codes in Dix Hills
Which ZIP codes are in Dix Hills: 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 Dix Hills
Other towns in Suffolk County with a page of their own.
What to do next
- Read South Huntington Water District’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for LeadRanked by certification and what they cost over five years.The best water filters for lead, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water