Is North Castle Water District #4 Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Westchester

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
MON	Monitoring	Resolved	2020-01-01 → 2020-01-31
MON	Monitoring	Resolved	2020-01-01 → 2020-01-31
MON	Monitoring	Resolved	2020-01-01 → 2020-01-31
MON	Monitoring	Resolved	2020-01-01 → 2020-01-31
MON	Monitoring	Resolved	2018-01-01 → 2018-01-31
MON	Monitoring	Resolved	2018-01-01 → 2018-01-31
MON	Monitoring	Archived	2017-03-01 → 2017-03-31
MON	Monitoring	Archived	2017-01-01 → 2017-01-31
MR	Monitoring	Resolved	2015-01-01
MR	Monitoring	Resolved	2015-01-01

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	1444.5 µg/L 14% of the EPA limit 10000 µg/L worst single sample: 1490 µg/L	28/28	SYR4	2012–2019
Bromodichloromethane	4.5955 µg/L No EPA limit set worst single sample: 6.8 µg/L	24/24	SYR4	2012–2019
Chloroform	2.5495 µg/L No EPA limit set worst single sample: 2.71 µg/L	24/24	SYR4	2012–2019
Dibromochloromethane	7.317 µg/L No EPA limit set worst single sample: 11 µg/L	24/24	SYR4	2012–2019
TTHM	18.72 µg/L 23% of the EPA limit 80 µg/L worst single sample: 29.3 µg/L	24/24	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	4.966 µg/L 8.3% of the EPA limit 60 µg/L worst single sample: 7.23 µg/L	17/24	SYR4	2012–2019
Lead	0.0025 mg/L 17% of the EPA limit 0.0150 mg/L	16/16	LCR	2025
Bromoform	6.064 µg/L No EPA limit set worst single sample: 8.78 µg/L	15/24	SYR4	2012–2019
Barium	316.8 µg/L 16% of the EPA limit 2000 µg/L worst single sample: 322 µg/L	14/14	SYR4	2012–2019
Chromium	7.475 µg/L 7.5% of the EPA limit 100 µg/L worst single sample: 7.8 µg/L	14/14	SYR4	2012–2019
Nitrate-Nitrite	1405.5 µg/L 14% of the EPA limit 10000 µg/L worst single sample: 1490 µg/L	14/14	SYR4	2012–2019
Dichloroacetic Acid	1.86 µg/L No EPA limit set worst single sample: 1.92 µg/L	13/24	SYR4	2012–2019
Dibromoacetic Acid	3.667 µg/L No EPA limit set worst single sample: 4.36 µg/L	12/24	SYR4	2012–2019
Combined Radium (-226 And -228)	1.099 pCi/L 22% of the EPA limit 5 pCi/L worst single sample: 1.149 pCi/L	6/6	SYR4	2016–2018
Combined Uranium	7.95 µg/L 27% of the EPA limit 30 µg/L worst single sample: 8.9 µg/L	6/6	SYR4	2016–2018
Gross Beta Particle Activity	8.64 pCi/L No EPA limit set worst single sample: 9.21 pCi/L	6/6	SYR4	2016–2018
Cyanide	42.6 µg/L 21% of the EPA limit 200 µg/L worst single sample: 46 µg/L	5/12	SYR4	2012–2018
Fluoride	135.5 µg/L 3.4% of the EPA limit 4000 µg/L worst single sample: 140 µg/L	4/14	SYR4	2012–2019
Trichloroacetic Acid	1.3815 µg/L No EPA limit set worst single sample: 1.41 µg/L	4/24	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	0.7800 pCi/L 5.2% of the EPA limit 15 pCi/L worst single sample: 0.8000 pCi/L	2/6	SYR4	2016–2018
2,4-D	3.02 µg/L 4.3% of the EPA limit 70 µg/L	1/11	SYR4	2014–2017
Monochloroacetic Acid	1.73 µg/L No EPA limit set	1/24	SYR4	2012–2019
Simazine	0.1400 µg/L 3.5% of the EPA limit 4 µg/L	1/11	SYR4	2014–2017

52 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TPAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: RENDE, JOSEPH
Phone: 914-273-3000
Email: supervisor@northcastleny.com

Frequently asked questions about North Castle Water District #4

Is North Castle Water District #4 tap water safe to drink?

EPA monitoring detected 23 contaminants in North Castle Water District #4'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 North Castle Water District #4's water?

EPA monitoring detected Nitrate, Bromodichloromethane, Chloroform, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.

How many people does North Castle Water District #4 serve?

North Castle Water District #4 reports serving 1,225 people in New York, per its EPA record.

Has North Castle Water District #4 had any water quality violations?

The EPA has 12 violations on file for North Castle Water District #4, of which 0 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.