Is Aquarion-Stamford Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Private
Counties served: Fairfield

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

129

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2021-12-30
Other	Monitoring	Resolved	2018-07-01
Other	Monitoring	Resolved	2018-07-01
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31
MR	Monitoring	Resolved	2016-01-01 → 2018-12-31

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFOA	0.0043 µg/L	3/8	2025
Pfhxa	0.0030 µg/L	1/8	2025
Pfpea	0.0031 µg/L	1/8	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
Copper	352.5 µg/L 27% of the EPA limit 1300 µg/L worst single sample: 730 µg/L	296/317	SYR4	2012–2019
Chloroform	58.75 µg/L No EPA limit set worst single sample: 79 µg/L	266/266	SYR4	2012–2019
Bromodichloromethane	17 µg/L No EPA limit set worst single sample: 22 µg/L	263/266	SYR4	2012–2019
Dibromochloromethane	4 µg/L No EPA limit set worst single sample: 6 µg/L	262/266	SYR4	2012–2019
TTHM	78.35 µg/L 98% of the EPA limit 80 µg/L worst single sample: 106 µg/L	254/254	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	49.35 µg/L 82% of the EPA limit 60 µg/L worst single sample: 61 µg/L	254/254	SYR4	2012–2019
Dichloroacetic Acid	21.4 µg/L No EPA limit set worst single sample: 29 µg/L	253/254	SYR4	2012–2019
Trichloroacetic Acid	30 µg/L No EPA limit set worst single sample: 34 µg/L	253/254	SYR4	2012–2019
Monochloroacetic Acid	2 µg/L No EPA limit set worst single sample: 4 µg/L	204/254	SYR4	2012–2019
Dibromoacetic Acid	1 µg/L No EPA limit set worst single sample: 2 µg/L	114/254	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	45/45	LCR	2026
Lead	18.6 µg/L 124% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 57 µg/L	37/317	SYR4	2012–2019
Nitrate	2372.5 µg/L 24% of the EPA limit 10000 µg/L worst single sample: 2470 µg/L	26/26	SYR4	2012–2019
Nitrate-Nitrite	1723.2 µg/L 17% of the EPA limit 10000 µg/L worst single sample: 2470 µg/L	25/25	SYR4	2012–2019
Barium	26.55 µg/L 1.3% of the EPA limit 2000 µg/L worst single sample: 78 µg/L	24/24	SYR4	2012–2019
Fluoride	858.5 µg/L 21% of the EPA limit 4000 µg/L worst single sample: 900 µg/L	24/24	SYR4	2012–2019
Monobromoacetic Acid	1 µg/L No EPA limit set	16/254	SYR4	2012–2019
Bromoform	1 µg/L No EPA limit set	7/266	SYR4	2012–2019

88 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

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

Frequently asked questions about Aquarion-Stamford

Is Aquarion-Stamford tap water safe to drink?

EPA monitoring detected 21 contaminants in Aquarion-Stamford'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-Stamford's water?

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

How many people does Aquarion-Stamford serve?

Aquarion-Stamford reports serving 119,214 people in Connecticut, per its EPA record.

Has Aquarion-Stamford had any water quality violations?

The EPA has 129 violations on file for Aquarion-Stamford, 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.