County · Maine

Hancock County, Maine: drinking water records

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

Explore EPA records for 30 community water systems across 40 ZIP codes in Hancock County, then find water-testing resources and available recent monitoring-station readings.

In focus30Community 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 3 of the 30 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 30 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
Ellsworth Water Department ME0090520	3,910	120	0	5	4 ppbbelow the action level
Town of Bar Harbor- Water Division ME0090120	4,443	120	2	0	3.4 ppbbelow the action level
Southwest Harbor Water & Sewer District ME0091490	2,480	0	0	7	2.1 ppbbelow the action level
Stonington Water Company ME0091510	683	0	0	5	1.3 ppbbelow the action level
Franklin Water Department ME0090570	443	60	4	0	3.6 ppbbelow the action level
Long Pond Water District ME0090890	308	0	0	20	4 ppbbelow the action level
Parker Ridge Retirement Community ME0092265	120	0	0	1	20.8 ppbat or above the action level
Birch Tree Meadows MHP ME0095663	105	0	0	3	0.7 ppbbelow the action level
Hancock Village MHP ME0002527	73	0	0	1	0 ppbbelow the action level
Sherwood Forest MHP ME0015106	68	0	0	3	6.7 ppbbelow the action level
Blue Hill Terrace ME0092110	60	0	0	4	8.9 ppbbelow the action level
Spinsfield Commons ME0095655	45	0	0	3	0 ppbbelow the action level
Stonington Manor ME0092120	44	0	0	6	8.4 ppbbelow the action level
Birch Haven Trailer Park ME0007233	43	0	0	1	9.6 ppbbelow the action level
Harbor View I & II ME0092165	40	0	0	2	1.2 ppbbelow the action level
Maine Water Company Bucksport Division ME0090280	1,700	0	0	0	2 ppbbelow the action level
Mount Desert Water Dist North ME0091140	1,623	0	0	0	2.5 ppbbelow the action level
Castine Water Department ME0090330	983	0	0	0	0 ppbbelow the action level
Mount Desert Water Dist -Seal ME0091420	865	0	0	0	2.2 ppbbelow the action level
Winter Harbor Water District ME0091630	700	0	0	0	1.4 ppbbelow the action level
Cold Spring Water Company ME0090360	305	0	0	0	0.7 ppbbelow the action level
Sun Hancock Heights- East ME0007242	158	0	0	0	3.5 ppbbelow the action level
Sun Hancock Heights-West ME0107242	155	0	0	0	0 ppbbelow the action level
Silver Lake Estates ME0092722	110	0	0	0	0 ppbbelow the action level
Deer Run Apts ME0090425	60	0	0	0	1.3 ppbbelow the action level
Crescent Mobile Home Park ME0007237	55	0	0	0	0 ppbbelow the action level
Benjamin River Apts ME0090145	45	0	0	0	5.9 ppbbelow the action level
Harriman Cove Park LLC ME0002245	45	0	0	0	0 ppbbelow the action level
South Penobscot Water Association ME0092060	38	0	0	0	0.8 ppbbelow the action level
Coastal Estates ME0092875	48	0	0	0	not reported

Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. One system in this table is at or above it. What an action level means

USGS · Monitoring stations

The water, more recently.

Available station readings in Hancock County, Maine. 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 Hancock County

40ZIP 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

Bar Harbor
Blue Hill
Bucksport
Castine
Ellsworth
Northeast Harbor
Southwest Harbor
Winter Harbor

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

04408
04416Bucksport
04421Castine
04429
04431
04472
04476
04605Ellsworth
04607
04609Bar Harbor
04612
04613
04614Blue Hill
04616
04617
04624
04625
04627
04634
04635
04640
04642
04646
04650
04653
04660
04662Northeast Harbor
04664
04669
04673
04674
04675
04676
04677
04679Southwest Harbor
04681
04683
04684
04685
04693Winter Harbor

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 2 of the 3 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter15 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 Hancock County

All Maine 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.