Aquarion-Ridgefield

Published drinking-water records and contacts for Aquarion-Ridgefield. System CT1180011. Review sources and dates; not a real-time water assessment.

System ID: CT1180011
State or territory: CT
Published population served: 7476
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 300 — 2024-03-07 – 2025-01-28
Lead and copper monitoring summaries: 20 — 1992-07-01 – 2025-12-31

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
ADONA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2024-12-03	INTERCONNECT AQUARION REG PIPELINE / 3
NFDHA	< 0.02 µg/L	0.02 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2024-12-03	INTERCONNECT AQUARION REG PIPELINE / 3
PFBA	< 0.005 µg/L	0.005 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFBS	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFDA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFDoA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFEESA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFHpA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFHpS	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFHxA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFHxS	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFMBA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFMPA	< 0.004 µg/L	0.004 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFNA	< 0.004 µg/L	0.004 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFOA	0.0050 µg/L	0.004 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFOS	< 0.004 µg/L	0.004 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFPeA	< 0.003 µg/L	0.003 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFPeS	< 0.004 µg/L	0.004 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
PFTA	< 0.008 µg/L	0.008 µg/L	2024-12-03	INTERCONNECT AQUARION REG PIPELINE / 3
PFTrDA	< 0.007 µg/L	0.007 µg/L	2024-12-03	INTERCONNECT AQUARION REG PIPELINE / 3
PFUnA	< 0.002 µg/L	0.002 µg/L	2025-01-28	AQUARION WATER CO OF CT-RIDGEFIELD SYS / 3
lithium	< 9 µg/L	9 µg/L	2024-12-03	INTERCONNECT AQUARION REG PIPELINE / 3

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Published 90th percentile	Monitoring period	Source quarter
Lead (PB90)	0.0031 mg/L	2025-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0.008 mg/L	2024-01-01 – 2024-12-31	2026Q3
Lead (PB90)	0.004 mg/L	2023-01-01 – 2023-12-31	2026Q3
Lead (PB90)	0.004 mg/L	2022-01-01 – 2022-12-31	2026Q3
Lead (PB90)	0.003 mg/L	2021-01-01 – 2021-12-31	2026Q3
Lead (PB90)	0.004 mg/L	2020-07-01 – 2020-12-31	2026Q3
Lead (PB90)	0 mg/L	2020-01-01 – 2020-06-30	2026Q3
Lead (PB90)	0.002 mg/L	2019-07-01 – 2019-12-31	2026Q3

Published compliance history

6 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Lead and Copper Rule / Lead Consumer Notice	2021-12-30 – —	Resolved	No	2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation	2021-01-21 – —	Resolved	No	2026Q3
Ground Water Rule / Monitoring, Source Water (GWR)	2019-09-12 – —	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report	2018-07-01 – —	Resolved	No	2026Q3
Lead and Copper Rule / Initial Tap Sampling for Pb and Cu	1993-01-01 – 1993-10-26	Archived	No	2026Q3
Surface Water Treatment Rule / Failure to Filter (SWTR)	1992-01-01 – 2001-05-23	Archived	Yes	2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17

Administrative contact (EPA filing)

Ulrich, Robert J.: 203-926-4320

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records