Friday Harbor Water Quality
Washington
According to EPA SDWIS, Friday Harbor, Washington is served by 18 community water systems covering about 6,761 people. The same extract lists 82 health-based violation records, most recently coded 2950 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Friday Harbor, Washington is delivered through 18 EPA-regulated community water systems serving an estimated 6,761 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 82 violation records across the 18 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 3 distinct EPA contaminant codes: TTHM, Total Haloacetic Acids (HAA5), Surface Water Treatment Rule.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Washington drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| FRIDAY HARBOR TOWN OF | 3,543 | 1 | Health |
| ROCHE HARBOR WATER SYSTEM INC | 2,091 | 1 | Health |
| CAPE SAN JUAN WATER DISTRICT | 164 | 42 | Health |
| OAKS THE MOBILE HOME PARK | 143 | 0 | Clean |
| PORTLAND FAIR ESTATES | 130 | 11 | Health |
| LIMESTONE POINT WATER COMPANY INC | 81 | 0 | Clean |
| MITCHELL POINT WATER ASSN | 81 | 0 | Clean |
| UNIVERSITY HEIGHTS | 76 | 0 | Clean |
| HANNAH HEIGHTS OWNERS ASSOCIATION | 66 | 0 | Clean |
| EAGLE COVE WATER ASSOCIATION | 65 | 0 | Clean |
| CATTLE POINT WATER DISTRICT | 63 | 0 | Clean |
| MINERAL HEIGHTS ASSOCIATION | 46 | 0 | Clean |
| HANNAH HEIGHTS #2 WATER USERS ASSN | 44 | 4 | Health |
| SAN JUAN FAIRWAYS OWNERS ASSN | 40 | 1 | Health |
| FAIRWAY NUMBER THREE WATER | 39 | 22 | Health |
| SAN JUAN RANCHOS | 35 | 0 | Clean |
| SMUGGLERS COVE WATER SYSTEM | 27 | 0 | Clean |
| NORTH FORTY PROPERTY OWNERS ASSN | 27 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| PORTLAND FAIR ESTATES | TTHM | 2025-10-01 |
| HANNAH HEIGHTS #2 WATER USERS ASSN | TTHM | 2025-10-01 |
| PORTLAND FAIR ESTATES | TTHM | 2025-07-01 |
| HANNAH HEIGHTS #2 WATER USERS ASSN | TTHM | 2025-07-01 |
| PORTLAND FAIR ESTATES | TTHM | 2025-04-01 |
| HANNAH HEIGHTS #2 WATER USERS ASSN | TTHM | 2025-04-01 |
| HANNAH HEIGHTS #2 WATER USERS ASSN | TTHM | 2025-04-01 |
| PORTLAND FAIR ESTATES | TTHM | 2025-01-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-10-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-10-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-07-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-07-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-04-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-04-01 |
| PORTLAND FAIR ESTATES | TTHM | 2024-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2024-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2024-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2024-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-01-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-01-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2023-01-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-10-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-07-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-07-01 |
| FAIRWAY NUMBER THREE WATER | TTHM | 2022-04-01 |
| FAIRWAY NUMBER THREE WATER | TTHM | 2022-04-01 |
| FAIRWAY NUMBER THREE WATER | TTHM | 2022-04-01 |
| FAIRWAY NUMBER THREE WATER | Total Haloacetic Acids (HAA5) | 2022-04-01 |
| FAIRWAY NUMBER THREE WATER | Total Haloacetic Acids (HAA5) | 2022-04-01 |
| FAIRWAY NUMBER THREE WATER | Total Haloacetic Acids (HAA5) | 2022-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-04-01 |
| CAPE SAN JUAN WATER DISTRICT | TTHM | 2022-04-01 |
What are Friday Harbor's health-based records for?
Friday Harbor's health-based violation records carry 3 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Tthm | 69 | 5 |
| Total Haloacetic Acids (HAA5) | 11 | 1 |
| Surface Water Treatment Rule | 2 | 2 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Friday Harbor, Washington? ▼
How many water violations does Friday Harbor have in this EPA extract? ▼
What contaminants were found in Friday Harbor water? ▼
How many water systems serve Friday Harbor? ▼
Where does Friday Harbor get its drinking water? ▼
How does Friday Harbor compare in Washington?
Of the 365 Washington places with at least one community water system on file, Friday Harbor ranks #30 by number of systems (18).
Either side of it: Ferndale (19), Vancouver (19), Stanwood (18), Woodland (18)
About This Data
Figures here are the current EPA SDWIS extract joined to the 18 community water systems whose service area lists Friday Harbor, ranked against the 365 Washington places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.