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Tap water quality report

Aquarion-New Canaan

EPA monitoring tested this supplier for 44 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

44
contaminants tested
16
detected
10,097
people served
0
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
SWP
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.

0
health-based violations
20
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2021-10-22
Other Monitoring Resolved 2021-10-22
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31
MR Monitoring Resolved 2020-02-29 → 2020-05-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0056 µg/L 2/4 2024
Pfhxa 0.0034 µg/L 1/4 2024
Pfpea 0.0030 µg/L 1/4 2024

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
14.65 µg/L
No EPA limit set
worst single sample: 16 µg/L
128/128 SYR4 2012–2019
Chloroform
61.65 µg/L
No EPA limit set
worst single sample: 84 µg/L
128/128 SYR4 2012–2019
TTHM
73.3 µg/L 92%
of the EPA limit 80 µg/L
worst single sample: 101 µg/L
128/128 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
45.7 µg/L 76%
of the EPA limit 60 µg/L
worst single sample: 58 µg/L
127/128 SYR4 2012–2019
Trichloroacetic Acid
25 µg/L
No EPA limit set
worst single sample: 32 µg/L
127/128 SYR4 2012–2019
Dichloroacetic Acid
19 µg/L
No EPA limit set
worst single sample: 25 µg/L
125/128 SYR4 2012–2019
Dibromochloromethane
6 µg/L
No EPA limit set
worst single sample: 9 µg/L
124/128 SYR4 2012–2019
Monochloroacetic Acid
2 µg/L
No EPA limit set
 92/128 SYR4 2012–2019
Copper
399 µg/L 31%
of the EPA limit 1300 µg/L
worst single sample: 740 µg/L
62/62 SYR4 2014–2017
Dibromoacetic Acid
2 µg/L
No EPA limit set
 40/128 SYR4 2012–2019
Bromoform
3 µg/L
No EPA limit set
 28/128 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2023
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
 11/62 SYR4 2014–2017
28 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaLithium

Utility contact

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

Frequently asked questions about Aquarion-New Canaan

Is Aquarion-New Canaan tap water safe to drink?

EPA monitoring detected 16 contaminants in Aquarion-New Canaan'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-New Canaan's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Aquarion-New Canaan serve?

Aquarion-New Canaan reports serving 10,097 people in Connecticut, per its EPA record.

Has Aquarion-New Canaan had any water quality violations?

The EPA has 20 violations on file for Aquarion-New Canaan, 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.