Greenlawn Water District Water Quality (New York) – 2025 Report Results

We read 20 results from Greenlawn Water District’s 2025 water quality report. No results over a legal limit; 7 above a health goal or guideline.

Serves about 42,000 people · Water system ID NY5103271 · Read the district’s 2025 report (opens in a new tab)

Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.

Results from the 2025 report

Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.

Contaminant	Result	Health goal	Legal limit	What it means
Arsenichighest measured · range ND to 1.5 · listed as a violation in the report · Wells · 2025 report, page 3	1.5 ppb	0.004 ppb	10 ppb	Above the health goal375x the health goal
Chromium-6highest measured · range ND to 0.26 · listed as a violation in the report · Wells · 2025 report, page 3	0.26 ppb	0.02 ppb	10 ppb	Above the health goal13x the health goal
Gross alpha (radioactivity)highest measured · range ND to 0.94 · listed as a violation in the report · Wells · 2025 report, page 4	0.94 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
PFOA (a PFAS)highest measured · range ND to 8.88 · listed as a violation in the report · Wells · 2025 report, page 3	8.88 ppt	0.007 ppt	10 ppt (New York) now; 4 ppt from 2029	Above the federal limit that takes effect in 20292.2x the 4 ppt federal limit that takes effect in 2029; below the 10 ppt New York limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029.
PFOS (a PFAS)highest measured · range ND to 7.07 · listed as a violation in the report · Wells · 2025 report, page 3	7.07 ppt	1 ppt	10 ppt (New York) now; 4 ppt from 2029	Above the federal limit that takes effect in 20291.8x the 4 ppt federal limit that takes effect in 2029; below the 10 ppt New York limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029.
Radium (combined 226 + 228)highest measured · range 0.93 to 1.59 · listed as a violation in the report · Wells · 2025 report, page 4	1.59 pCi/L	0 pCi/L	5 pCi/L	Above the health goalThe health goal is zero
Tetrachloroethylene (PCE)highest measured · listed as a violation in the report · Wells · 2025 report, page 4	3.7 ppb	0.06 ppb	5 ppb	Above the health goal62x the health goal
1,1-Dichloroethylenehighest measured · range ND to 0.62 · listed as a violation in the report · Wells · 2025 report, page 4	0.62 ppb	7 ppb	7 ppb	Below the health goal
Chloridehighest measured · range 5.2 to 74 · listed as a violation in the report · Wells · 2025 report, page 3	74 ppm	—	250 ppm guideline	Within the guideline
cis-1,2-Dichloroethylenehighest measured · range ND to 2 · listed as a violation in the report · Wells · 2025 report, page 4	2 ppb	70 ppb	70 ppb	Below the health goal
Copper90th percentile of 40 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 3	0.15 ppm	0.3 ppm	1.3 ppm (action level)	Below the health goal
Cyanidehighest measured · range ND to 20.4 · listed as a violation in the report · Wells · 2025 report, page 3	20.4 ppb	150 ppb	200 ppb	Below the health goal
Disinfection byproducts (TTHM)highest measured · range ND to 4.3 · listed as a violation in the report · Distribution system · 2025 report, page 4	4.3 ppb	None set	80 ppb	Below the legal limit
Ironhighest measured · range ND to 0.09 · listed as a violation in the report · Wells · 2025 report, page 3	0.09 ppm	—	0.3 ppm guideline	Within the guideline
Lead90th percentile of 40 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 3	Not detected	0.2 ppb	15 ppb (action level)	Not detected
Mercuryhighest measured · range ND to 0.22 · listed as a violation in the report · Wells · 2025 report, page 3	0.22 ppb	1.2 ppb	2 ppb	Below the health goal
Nitrate (as N)highest measured · range 0.79 to 9.6 · listed as a violation in the report · Wells · 2025 report, page 3	9.6 ppm	10 ppm	10 ppm	Below the health goal
PFHxS (a PFAS)highest measured · range ND to 4.87 · listed as a violation in the report · Wells · 2025 report, page 4	4.87 ppt	None set	10 ppt from 2029	Below the legal limit
Sulfatehighest measured · range ND to 15.9 · listed as a violation in the report · Wells · 2025 report, page 3	15.9 ppm	—	250 ppm guideline	Within the guideline
Sodiumhighest measured · range 3.6 to 57.2 · listed as a violation in the report · Wells · 2025 report, page 3	57.2 ppm	None set	None	No health limit

Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in Greenlawn Water District’s water between Oct 2023 and Aug 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFHxS3.2 pptFound in 1 of 24 samples · highest resultNo federal limit in force for this one

Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.

What you can do

Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.