County · Washington

San Juan County, Washington: drinking water records

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

Explore EPA records for 41 community water systems across 9 ZIP codes in San Juan County, then find water-testing resources and available recent monitoring-station readings.

In focus41Community 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 2 of the 41 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 41 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	Health-based violations	Lead, 9 in 10 homes at or below
Eastsound Water Users Association WA5322170	3,711	300	1	5.3 ppbbelow the action level
Friday Harbor Town of WA5326595	3,543	120	0	1.6 ppbbelow the action level
Cape San Juan Water District WA5311065	164	0	13	5.1 ppbbelow the action level
Portland Fair Estates WA5369008	130	0	8	0.9 ppbbelow the action level
Spring Point Homeowners Association WA5383335	85	0	21	0 ppbbelow the action level
Hannah Heights #2 Water Users Assn WA5325264	44	0	4	4.8 ppbbelow the action level
San Juan Fairways Owners Assn WA5375765	40	0	1	4.6 ppbbelow the action level
Fairway Number Three Water WA5324528	39	0	10	1.2 ppbbelow the action level
E.L.C. Water System WA5302051	36	0	8	10.3 ppbbelow the action level
Roche Harbor Water System INC WA5373230	2,091	0	0	3.3 ppbbelow the action level
Rosario WA5374270	1,426	0	0	4.5 ppbbelow the action level
Fisherman Bay Water Association WA5325547	1,195	0	0	0 ppbbelow the action level
Doe Bay Water Users Assoc WA5319600	442	0	0	3.3 ppbbelow the action level
Olga Water Users INC WA5363400	392	0	0	3.1 ppbbelow the action level
Orcas Highlands WA5313301	260	0	0	10.1 ppbbelow the action level
West Sound Water Association WA5345014	206	0	0	1.6 ppbbelow the action level
Oaks the Mobile Home Park WA5387780	143	0	0	1.1 ppbbelow the action level
Mackaye Harbor Water District WA5312911	133	0	0	1.5 ppbbelow the action level
North Lopez Service WA5360665	114	0	0	0 ppbbelow the action level
Harbor on Fisherman Bay WA5331024	84	0	0	2.1 ppbbelow the action level
Limestone Point Water Company INC WA5347280	81	0	0	1.7 ppbbelow the action level
Mitchell Point Water Assn WA5355370	81	0	0	5.6 ppbbelow the action level
Raccoon Point Water System WA5370670	81	0	0	1.6 ppbbelow the action level
Sunset Ranch Owners Assoc WA5386150	76	0	0	3.5 ppbbelow the action level
University Heights WA5390543	76	0	0	1.7 ppbbelow the action level
Hannah Heights Owners Association WA5330850	66	0	0	0 ppbbelow the action level
Eagle Cove Water Association WA5320803	65	0	0	1.2 ppbbelow the action level
Cattle Point Water District WA5342751	63	0	0	0 ppbbelow the action level
Orcas Island Golf Estates WA5328460	57	0	0	9 ppbbelow the action level
Mineral Heights Association WA5355035	46	0	0	2.5 ppbbelow the action level
Aleck Bay Park Water System WA5301338	40	0	0	3.3 ppbbelow the action level
Humphrey Head Owners Assoc WA5334860	37	0	0	4.6 ppbbelow the action level
Common Field Water System WA53AB738	36	0	0	4.6 ppbbelow the action level
San Juan Ranchos WA5375795	35	0	0	1.5 ppbbelow the action level
Shoal Bay & Swift Bay Water Assn. WA5378398	35	0	0	1.9 ppbbelow the action level
Cayou Valley Homeowners Assoc WA5311860	31	0	0	1.1 ppbbelow the action level
Milagra Water System WA53AA517	31	0	0	1.4 ppbbelow the action level
North Forty Property Owners Assn WA5301698	27	0	0	0.3 ppbbelow the action level
Smugglers Cove Water System WA5301666	27	0	0	1.7 ppbbelow the action level
Sunrise Beach Association WA5385641	27	0	0	0 ppbbelow the action level
Salish Sea Water System WA53AC941	26	0	0	not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in San Juan County, Washington. 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 San Juan County

9ZIP 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

Roche Harbor

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

98222
98243
98245
98250Roche Harbor
98261
98279
98280
98286
98297

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.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s PFAS survey records.LeadChoosing a lead filter9 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 San Juan County

All Washington 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.