Is Sandwich Water District Tap Water Safe? Quality Report

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

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	2009-08-01 → 2009-08-31
MCL	Health-based	Resolved	2009-08-01 → 2009-08-31
MCL	Health-based	Resolved	2009-07-01 → 2009-07-31
MCL	Health-based	Resolved	2009-07-01 → 2009-07-31
MCL	Health-based	Archived	2007-08-01 → 2007-08-31
MCL	Health-based	Resolved	2006-11-01 → 2006-11-30
MCL	Health-based	Resolved	2006-11-01 → 2006-11-30
MCL	Health-based	Resolved	2006-10-01 → 2006-10-31
MCL	Health-based	Resolved	2006-10-01 → 2006-10-31
MCL	Health-based	Resolved	2006-07-01 → 2006-07-31

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
Tetrachloroethylene	1.6 µg/L 32% of the EPA limit 5 µg/L worst single sample: 4.2 µg/L	503/1178	SYR4	2012–2019
Nitrate	3408.5 µg/L 34% of the EPA limit 10000 µg/L worst single sample: 4480 µg/L	160/160	SYR4	2012–2019
TTHM	6.7 µg/L 8.4% of the EPA limit 80 µg/L worst single sample: 8 µg/L	86/116	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	1.2 µg/L 2% of the EPA limit 60 µg/L worst single sample: 2.2 µg/L	50/105	SYR4	2012–2019
Barium	13.15 µg/L 0.7% of the EPA limit 2000 µg/L worst single sample: 15 µg/L	38/50	SYR4	2012–2016
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	18/18	LCR	2025
Fluoride	110 µg/L 2.8% of the EPA limit 4000 µg/L	1/50	SYR4	2012–2016

91 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DANIEL H MAHONEY
Phone: 5088882775
Email: [email protected]

Frequently asked questions about Sandwich Water District

Is Sandwich Water District tap water safe to drink?

EPA monitoring detected 7 contaminants in Sandwich Water District'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 Sandwich Water District's water?

EPA monitoring detected Tetrachloroethylene, Nitrate, TTHM, Total Haloacetic Acids (HAA5), Barium, and others. The full list with the level and data source for each is above.

How many people does Sandwich Water District serve?

Sandwich Water District reports serving 23,000 people in Massachusetts, per its EPA record.

Has Sandwich Water District had any water quality violations?

The EPA has 22 violations on file for Sandwich Water District, of which 18 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.