Is Rockville Centre Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
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

128

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2002-10-01 → 2002-10-31
MCL	Health-based	Resolved	2002-10-01 → 2002-10-31
MCL	Health-based	Resolved	2002-10-01 → 2002-10-31
MCL	Health-based	Resolved	2001-09-01 → 2001-09-30
MCL	Health-based	Resolved	2001-09-01 → 2001-09-30
MCL	Health-based	Resolved	1998-02-01 → 1998-02-28
MCL	Health-based	Resolved	1998-02-01 → 1998-02-28
MCL	Health-based	Archived	1996-10-01 → 1996-10-31
MCL	Health-based	Archived	1994-07-01 → 1994-07-31
MR	Monitoring	Resolved	2014-01-01 → 2014-12-31

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
Copper	156.15 µg/L 12% of the EPA limit 1300 µg/L worst single sample: 300 µg/L	50/64	SYR4	2012–2019
Barium	8.3 µg/L 0.4% of the EPA limit 2000 µg/L worst single sample: 12 µg/L	38/63	SYR4	2012–2019
Lead	2.9025 µg/L 19% of the EPA limit 15 µg/L worst single sample: 7.75 µg/L	26/64	SYR4	2012–2019
Dibromochloromethane	2.36 µg/L No EPA limit set worst single sample: 2.45 µg/L	21/29	SYR4	2014–2019
Bromoform	4.585 µg/L No EPA limit set worst single sample: 6.2 µg/L	18/29	SYR4	2014–2019
Combined Uranium	1.075 µg/L 3.6% of the EPA limit 30 µg/L worst single sample: 1.255 µg/L	17/21	SYR4	2013–2016
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	10/10	LCR	2024
Bromodichloromethane	0.9280 µg/L No EPA limit set worst single sample: 1 µg/L	9/29	SYR4	2014–2019
Dibromoacetic Acid	2.94 µg/L No EPA limit set worst single sample: 3.7 µg/L	9/29	SYR4	2014–2019
Gross Beta Particle Activity	2.77 pCi/L No EPA limit set worst single sample: 2.95 pCi/L	9/9	SYR4	2016
Arsenic	1.96 µg/L 20% of the EPA limit 10 µg/L worst single sample: 2.1 µg/L	5/64	SYR4	2012–2019
Combined Radium (-226 And -228)	1.946 pCi/L 39% of the EPA limit 5 pCi/L worst single sample: 1.99 pCi/L	5/21	SYR4	2013–2016
Nitrate	66 µg/L 0.7% of the EPA limit 10000 µg/L	4/142	SYR4	2012–2019
TTHM	6.27 µg/L 7.8% of the EPA limit 80 µg/L worst single sample: 6.3 µg/L	3/3	SYR4	2018–2019
Total Haloacetic Acids (HAA5)	2.16 µg/L 3.6% of the EPA limit 60 µg/L worst single sample: 2.2 µg/L	3/3	SYR4	2018–2019
Monochloroacetic Acid	2.2 µg/L No EPA limit set	1/29	SYR4	2014–2019
Nitrate-Nitrite	61 µg/L 0.6% of the EPA limit 10000 µg/L	1/68	SYR4	2012–2019
Selenium	6 µg/L 12% of the EPA limit 50 µg/L	1/64	SYR4	2012–2019
Thallium, Total	0.3500 µg/L 18% of the EPA limit 2 µg/L	1/64	SYR4	2012–2019

93 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-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-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: IANNONE, ANTHONY
Phone: 516-678-9313
Email: [email protected]

Frequently asked questions about Rockville Centre

Is Rockville Centre tap water safe to drink?

EPA monitoring detected 19 contaminants in Rockville Centre'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 Rockville Centre's water?

EPA monitoring detected Copper, Barium, Lead, Dibromochloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Rockville Centre serve?

Rockville Centre reports serving 24,700 people in New York, per its EPA record.

Has Rockville Centre had any water quality violations?

The EPA has 128 violations on file for Rockville Centre, of which 9 are 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.