Aquarion-Eastern Fairfield County water quality
Fairfield, CT · serves 351,756 people (108,501 connections) · Surface water · Private · EPA ID CT0150011
Data: U.S. EPA · How we read the data · How we check it
Buys water from Aquarion-Stamford, Aquarion-Ridgefield, Norwalk First Taxing District. Treated water bought from another system can carry that system's contaminants.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit7 of 29 PFAS found at least once. All averages below the federal limits.
- Lead
- Below action level0 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period Jan 2026 – now, still in progress (results reported so far). Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Want to reduce what was found? Filters for these results.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Aquarion-Eastern Fairfield County's 2026 water quality report (Consumer Confidence Report, from the utility). It lists every regulated contaminant tested, including ones not on this page. Questions: (203) 926-4320.
PFAS (“forever chemicals”)
EPA UCMR 5: 5 entry points tested Jan 2023 to Feb 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA One sample above limit Limit 4 ppt | 1.05 ppt 26% of the limit |
| PFOS One sample above limit Limit 4 ppt | 0 ppt 0% of the limit |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Detected, below limit Guideline 2,000 ppt | 0 ppt |
| PFBA Detected, below limit Guideline 6,000 ppt | 1.9 ppt |
| PFHxA Detected, below limit Guideline 3,000 ppt | 0 ppt |
| PFPeA Detected, no limit | 0 ppt |
| PFHpA Detected, no limit | 0 ppt |
29 PFAS tested, 7 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 14 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 0 ppb lead (Jan 2026 – now (in progress)). Below action level
Highest since 2016: 8 ppb (Dec 2021).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2026 – now (in progress) | 0 ppb |
| Jan 2025 – Dec 2025 | 1.7 ppb |
| Jan 2024 – Dec 2024 | 3 ppb |
Earlier results (9)
| Jan 2023 – Dec 2023 | 2 ppb |
| Jan 2022 – Dec 2022 | 2 ppb |
| Jul 2021 – Dec 2021 | 2 ppb |
| Jan 2021 – Dec 2021 | 0 ppb |
| Jan 2019 – Dec 2021 | 8 ppb |
| Jan 2021 – Jun 2021 | 2 ppb |
| Jul 2020 – Dec 2020 | 2 ppb |
| Jan 2020 – Dec 2020 | 0 ppb |
| Jan 2020 – Jun 2020 | 2 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 74.3 ppb | 300 ppb |
| Chlorate | 660 ppb | 210 ppb |
| Chromium-6 | 0.14 ppb | – |
| Vanadium | 0.46 ppb | 21 ppb |
| Strontium | 0.12 ppm | 1.5 ppm |
Where it serves
Fairfield, Shelton, Newtown, Greenwich, Stamford, Ridgefield, Redding, Easton, Wilton, Monroe, Trumbull, Norwalk, New Canaan, Westport, Weston, Stratford, Bridgeport, Seymour, Darien, Beacon Falls
ZIP codes the system reported serving: 06468, 06484, 06604, 06605, 06606, 06607, 06608, 06610, 06611, 06612, 06614, 06615, 06650, 06824, 06825, 06880, 06881, 06883, 06890, 06897
Nearby utilities
- Norwalk First Taxing District Norwalk · 10 mi · PFAS above limit
- Bethel Water Dept Bethel · 15 mi · PFAS above limit
- Aquarion-Ridgefield Ridgefield · 15 mi · PFAS above limit
- Aquarion-Newtown Regional Newtown · 15 mi · PFAS above limit
- Aquarion-Stamford Stamford · 16 mi
- Danbury Water Department Danbury · 19 mi · PFAS above limit
Questions
Is Aquarion-Eastern Fairfield County water safe to drink?
Aquarion-Eastern Fairfield County has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Aquarion-Eastern Fairfield County water have PFAS?
Yes. EPA's 2023–2025 testing of Aquarion-Eastern Fairfield County found 7 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Aquarion-Eastern Fairfield County water?
The most recent 90th-percentile lead result for Aquarion-Eastern Fairfield County is 0 ppb, for the monitoring period that began Jan 2026 (still in progress). The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for CT0150011: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID CT0150011).
- EPA SDWIS download: the lead results, population and violation records we use.
- Aquarion-Eastern Fairfield County's 2026 water quality report: the utility's own annual report, including contaminants EPA's national database doesn't carry (link checked Nov 14, 2026). Phone: (203) 926-4320.
- Aquarion-Eastern Fairfield County website
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.