Is Roslyn Wd Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Mixed public/private
Counties served: Nassau

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	1994-09-01 → 1994-09-30
MR	Monitoring	Resolved	1996-01-01
MR	Monitoring	Resolved	1996-01-01
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30
MR	Monitoring	Resolved	1994-04-01 → 1994-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFOA	0.0056 µg/L	2/16	2025
Pfpea	0.0030 µg/L	1/16	2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	6335 µg/L 63% of the EPA limit 10000 µg/L worst single sample: 8400 µg/L	394/406	SYR4	2012–2019
Nitrate-Nitrite	6200 µg/L 62% of the EPA limit 10000 µg/L worst single sample: 7600 µg/L	82/92	SYR4	2012–2019
Barium	39 µg/L 2% of the EPA limit 2000 µg/L worst single sample: 40.4 µg/L	80/82	SYR4	2012–2019
cis-1,2-Dichloroethylene	1.182 µg/L 1.7% of the EPA limit 70 µg/L worst single sample: 1.2 µg/L	37/477	SYR4	2012–2019
Copper	224 µg/L 17% of the EPA limit 1300 µg/L worst single sample: 590 µg/L	35/77	SYR4	2012–2019
Trichloroethylene	0.9700 µg/L 19% of the EPA limit 5 µg/L worst single sample: 1.2 µg/L	31/479	SYR4	2012–2019
Lead	7.1 µg/L 47% of the EPA limit 15 µg/L worst single sample: 9.4 µg/L	27/84	SYR4	2012–2019
Gross Beta Particle Activity	2.2355 pCi/L No EPA limit set worst single sample: 3.37 pCi/L	22/23	SYR4	2013–2019
Tetrachloroethylene	19.95 µg/L 399% of the EPA limit, at the 95th percentile of samples — 5 µg/L worst single sample: 20 µg/L	22/450	SYR4	2012–2019
Combined Uranium	2.07525 µg/L 6.9% of the EPA limit 30 µg/L worst single sample: 5.08 µg/L	18/21	SYR4	2013–2019
Ethylene Dibromide	0.0200 µg/L 40% of the EPA limit 0.0500 µg/L	17/174	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	9/9	LCR	2023
Combined Radium (-226 And -228)	2.0395 pCi/L 41% of the EPA limit 5 pCi/L worst single sample: 2.11 pCi/L	4/28	SYR4	2013–2019
1,1-Dichloroethylene	0.5950 µg/L 8.5% of the EPA limit 7 µg/L worst single sample: 0.6000 µg/L	3/479	SYR4	2012–2019
Chromium	7.095 µg/L 7.1% of the EPA limit 100 µg/L worst single sample: 7.4 µg/L	2/86	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	2.0315 pCi/L 14% of the EPA limit 15 pCi/L worst single sample: 2.05 pCi/L	2/20	SYR4	2013–2019
Antimony, Total	0.6500 µg/L 11% of the EPA limit 6 µg/L	1/80	SYR4	2012–2019
Arsenic	3.2 µg/L 32% of the EPA limit 10 µg/L	1/82	SYR4	2012–2019
TTHM	6.74 µg/L 8.4% of the EPA limit 80 µg/L	1/147	SYR4	2012–2019
Toluene	0.9000 µg/L 0.1% of the EPA limit 1000 µg/L	1/479	SYR4	2012–2019

86 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: PASSARIELLO, RICHARD J.
Phone: 516-621-7770
Email: [email protected]

Frequently asked questions about Roslyn Wd

Is Roslyn Wd tap water safe to drink?

EPA monitoring detected 22 contaminants in Roslyn Wd's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Roslyn Wd's water?

EPA monitoring detected Nitrate, Nitrate-Nitrite, Barium, cis-1,2-Dichloroethylene, Copper, and others. The full list with the level and data source for each is above.

How many people does Roslyn Wd serve?

Roslyn Wd reports serving 17,000 people in New York, per its EPA record.

Has Roslyn Wd had any water quality violations?

The EPA has 56 violations on file for Roslyn Wd, of which 1 is health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.