County · Connecticut

Fairfield County, Connecticut: drinking water records

Name: Drinking water records for Fairfield County, Connecticut
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 61 community water systems across 46 ZIP codes in Fairfield County, then find water-testing resources and available recent monitoring-station readings.

In focus61Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 12 of the 61 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 61 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
Danbury Water Department CT0340011	62,055	240	4	1	0 ppbbelow the action level
South Norwalk Electric & Water CT1030021	42,000	120	0	3	2 ppbbelow the action level
Aquarion-Eastern Fairfield County CT0150011	351,756	420	7	0	1.7 ppbbelow the action level
Aquarion-Stamford CT1350011	119,214	240	3	0	0 ppbbelow the action level
Aquarion-Greenwich CT0570011	53,297	360	4	0	2.2 ppbbelow the action level
Norwalk First Taxing District CT1030011	40,256	180	6	0	3 ppbbelow the action level
Aquarion-Darien CT0350011	18,737	240	4	0	2 ppbbelow the action level
Aquarion-New Milford Regional CT0960011	13,331	300	5	0	2 ppbbelow the action level
Aquarion-New Canaan CT0900011	10,097	120	3	0	0 ppbbelow the action level
Bethel Water Dept CT0090011	9,507	60	3	0	1.4 ppbbelow the action level
Aquarion-Ridgefield CT1180011	7,476	300	7	0	3.1 ppbbelow the action level
Aquarion-Newtown Regional CT0970011	6,054	120	8	0	4 ppbbelow the action level
Fairfield Hills CT0970021	2,610	0	0	1	4 ppbbelow the action level
Stone Bridge Center for Health & Rehab CT0971011	504	0	0	1	1.3 ppbbelow the action level
Knollcrest Tax District CT0910081	356	0	0	3	0 ppbbelow the action level
55 Sugar Street CT0970071	158	0	0	1	0.9 ppbbelow the action level
Brookfield Hills Condominium Unit Owners CT0180171	144	0	0	4	0.8 ppbbelow the action level
Aquarion-Pearce Manor CT0340081	133	0	0	1	1 ppbbelow the action level
Lake Lillinonah Shores Condos CT0180231	130	0	0	7	4.5 ppbbelow the action level
Cornell Hills Assoc, INC CT0340181	108	0	0	1	0 ppbbelow the action level
Weston Water Supply CT1570011	100	0	0	2	0 ppbbelow the action level
Woodcreek Village Condominium Assn, INC CT0180201	72	0	0	1	2 ppbbelow the action level
Cedar Terrace Prop Owners Assn CT0340141	66	0	0	3	1.1 ppbbelow the action level
Brookview Water Company CT1180091	55	0	0	1	3.4 ppbbelow the action level
Elmwood Court, LLC CT0090114	54	0	0	4	0.1 ppbbelow the action level
Brookfield Housing Authority CT0184011	37	0	0	3	0.8 ppbbelow the action level
39 Hop Brook Rd - Apt Complex CT0189971	36	0	0	3	0.3 ppbbelow the action level
Candlewood Shores Tax District CT0180061	1,315	0	0	0	6.1 ppbbelow the action level
Aquarion-Ridgefield Knolls CT1180021	958	0	0	0	3 ppbbelow the action level
Lake Waubeeka Association CT0340171	712	0	0	0	0 ppbbelow the action level
Aquarion-Ball Pond CT0910011	629	0	0	0	2.8 ppbbelow the action level
Brunswick School (Lower & Lower Middle) CT0579143	567	0	0	0	0 ppbbelow the action level
Candlewood Knolls Water Authority CT0910591	524	0	0	0	2.4 ppbbelow the action level
Aquarion-New Fairfield CT0915221	406	0	0	0	2.7 ppbbelow the action level
Stony Hill Village Condominium Assn CT0180251	392	0	0	0	1.8 ppbbelow the action level
Aqua Vista Assoc, INC CT0340111	388	0	0	0	1 ppbbelow the action level
Aquarion-Timber Trails CT1270021	310	0	0	0	1 ppbbelow the action level
Aquarion-Possum Ridge CT0910041	307	0	0	0	0 ppbbelow the action level
Arrowhead Point Homeowners Assn INC. CT0180091	296	0	0	0	3 ppbbelow the action level
Aquarion-Oakwood Acres CT0910031	286	0	0	0	2.3 ppbbelow the action level
Aquarion-Indian Spring CT0340191	242	0	0	0	0 ppbbelow the action level
Aquarion-Hollandale Estates CT0340251	200	0	0	0	1 ppbbelow the action level
Hawthorne Terrace Assoc CT0340151	156	0	0	0	0 ppbbelow the action level
Aquarion-Ken Oaks CT0340211	152	0	0	0	1 ppbbelow the action level
Aquarion-Indian Fields CT0180131	147	0	0	0	5 ppbbelow the action level
Candlewood Orchards Property Owners Corp CT0180181	144	0	0	0	2.3 ppbbelow the action level
Snug Harbor Development Corp CT0340231	144	0	0	0	1 ppbbelow the action level
Aquarion-Hickory Hills CT0180101	132	0	0	0	0 ppbbelow the action level
Aquarion-Scodon CT1180041	130	0	0	0	2 ppbbelow the action level
Aquarion-Butternut CT0180021	124	0	0	0	4 ppbbelow the action level
Aquarion-Barnum CT1189171	120	0	0	0	0 ppbbelow the action level
Shady Acres Mobile Home Park CT0347031	117	0	0	0	5.6 ppbbelow the action level
Danbury Water Dept-Ridgeview Gardens CT0340051	116	0	0	0	0 ppbbelow the action level
Aquarion-Rolling Ridge CT0340271	115	0	0	0	0 ppbbelow the action level
Aquarion-Fieldstone Ridge CT0910021	84	0	0	0	0 ppbbelow the action level
Aquarion-Berkshire CT0090292	75	0	0	0	0 ppbbelow the action level
Aquarion-Mckeon CT1189161	67	0	0	0	5 ppbbelow the action level
Aquarion-Birches CT0911091	66	0	0	0	0.8 ppbbelow the action level
Aquarion-Interlaken CT0911061	64	0	0	0	3 ppbbelow the action level
27 Maple Drive CT0859071	38	0	0	0	3 ppbbelow the action level
Tashua Village Association, INC. CT1440021	35	0	0	0	2.8 ppbbelow the action level

USGS · Monitoring stations

The water, more recently.

Available station readings in Fairfield County, Connecticut. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Fairfield County

46ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Ball Pond
Bethel
Bridgeport
Brookfield Center
Cos Cob
Danbury
Georgetown
Greens Farms
Greenwich
Lakeside Woods
Lordship
Murray
New Canaan
Newtown
Norwalk
Old Greenwich
Oronoque
Plattsville
Redding Center
Ridgefield
Riverside
Sandy Hook
Shelton
Southport
Stamford
Stepney
Tokeneke
Trumbull Center
Weston

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

06468Stepney
06470Newtown
06482Sandy Hook
06484Shelton
06604Bridgeport
06605Bridgeport
06606Bridgeport
06607Bridgeport
06608Bridgeport
06610Bridgeport
06611Trumbull Center
06612Plattsville
06614Oronoque
06615Lordship
06784Lakeside Woods
06801Bethel
06804Brookfield Center
06807Cos Cob
06810Danbury
06811Danbury
06812Ball Pond
06820Tokeneke
06824Murray
06825Plattsville
06830Greenwich
06831Stamford
06840New Canaan
06850Norwalk
06851Norwalk
06853Norwalk
06854Norwalk
06855Norwalk
06870Old Greenwich
06877Ridgefield
06878Riverside
06880Greens Farms
06883Weston
06890Southport
06896Redding Center
06897Georgetown
06901Stamford
06902Stamford
06903Stamford
06905Stamford
06906Stamford
06907Stamford

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 11 of the 12 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter23 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Fairfield County

All Connecticut counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.