Mt Vernon, WA · Island County

SEAWEST WATER SYSTEM Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Washington’s official records. Always confirm current status with Washington before making decisions based on this information.

System facts

System ID (PWSID): WA5337544
System type: Community Water System
Population served: 38
Service connections: 25
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2025 – December 31, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2025 – September 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2025 – June 30, 2025
Archived
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2025 – March 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2025 – March 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2024 – December 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2024 – December 31, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2022 – December 31, 2022
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2020 – June 9, 2023
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2019 – September 13, 2022
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Benzene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Toluene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Styrene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2008 – September 30, 2009
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2008 – September 30, 2009
Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2025 – December 31, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2025 – June 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2025 – March 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2025 – March 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2020 – June 9, 2023	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2019 – September 13, 2022	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2008 – September 30, 2009	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Benzene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Toluene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Styrene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2008 – September 30, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

June 4, 2025State Compliance achieved2 linked violations
June 4, 2025State Compliance achieved2 linked violations
May 28, 2024State Compliance achieved2 linked violations
May 24, 2024State Administrative/Compliance Order without penalty issued2 linked violations
June 9, 2023State Compliance achieved1 linked violation
September 13, 2022State Compliance achieved1 linked violation

Contact

SEAWEST WATER SYSTEM

Phone not on record

Mt Vernon, WA 98273