Is Aquarion-Marlborough Tap Water Safe? Quality Report

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

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

633

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MR	Monitoring	Resolved	2019-10-01 → 2019-12-31
MR	Monitoring	Resolved	2019-10-01 → 2019-12-31

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	386.65 µg/L 30% of the EPA limit 1300 µg/L worst single sample: 723 µg/L	284/291	SYR4	2012–2019
Lead	7 µg/L 47% of the EPA limit 15 µg/L worst single sample: 17 µg/L	184/291	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	31/31	LCR	2025
Nitrate	960 µg/L 9.6% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Nitrate-Nitrite	855 µg/L 8.6% of the EPA limit 10000 µg/L worst single sample: 960 µg/L	8/8	SYR4	2012–2019
Barium	4.8 µg/L 0.2% of the EPA limit 2000 µg/L worst single sample: 5 µg/L	3/3	SYR4	2012–2018
Fluoride	293 µg/L 7.3% of the EPA limit 4000 µg/L worst single sample: 300 µg/L	2/3	SYR4	2012–2018

63 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ULRICH, ROBERT J.
Phone: 203-926-4320
Email: [email protected]

Frequently asked questions about Aquarion-Marlborough

Is Aquarion-Marlborough tap water safe to drink?

EPA monitoring detected 7 contaminants in Aquarion-Marlborough'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 Aquarion-Marlborough's water?

EPA monitoring detected Copper, Lead, Lead, Nitrate, Nitrate-Nitrite, and others. The full list with the level and data source for each is above.

How many people does Aquarion-Marlborough serve?

Aquarion-Marlborough reports serving 1,348 people in Connecticut, per its EPA record.

Has Aquarion-Marlborough had any water quality violations?

The EPA has 633 violations on file for Aquarion-Marlborough, of which 8 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.