Tumwater, WA · Pierce County

MCNEIL ISLAND WATER Water System

Current status

4 open health-based violations on record as of July 4, 2026. See the violation history below for contaminant and status details.

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): WA5352900
System type: Community Water System
Population served: 692
Service connections: 271
Ownership: state government
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
TTHM
January 1, 2025 – December 31, 2025
Archived
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2025 – December 31, 2025
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2022 – December 28, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2022 – December 28, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2022 – December 28, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2022 – December 28, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2022 – December 28, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2021 – April 21, 2021
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2021
Addressed
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2020
Addressed
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2020
Addressed
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2020
Addressed
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2020 – October 5, 2020
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2020 – October 5, 2020
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 2020 – October 5, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2019 – March 31, 2019
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2017 – September 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2017 – September 30, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – April 4, 2013
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Benzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Toluene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Styrene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2008 – December 31, 2010
Archived
Monitoring, Regular
—
Carbofuran
January 1, 2008 – December 31, 2010
Archived
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2008 – December 31, 2010
Archived
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2008 – December 31, 2010
Archived
Monitoring, Regular
—
OXAMYL
January 1, 2008 – December 31, 2010
Archived
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Surface Water Treatment Rule
April 1, 2006 – April 30, 2006
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1979 – October 31, 1979
Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmation

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2025 – December 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2025 – December 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
November 1, 2022 – December 28, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2022 – December 28, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2022 – December 28, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2022 – December 28, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2022 – December 28, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2021 – April 21, 2021	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2021	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Addressed
December 1, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Addressed
October 1, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Addressed
September 1, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Addressed
August 1, 2020 – October 5, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2020 – October 5, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2020 – October 5, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2019 – March 31, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2018 – December 31, 2018	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2012 – April 4, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Benzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Toluene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Aldicarb	—	Archived
January 1, 2008 – December 31, 2010	Monitoring, Regular	Carbofuran	—	Archived
January 1, 2008 – December 31, 2010	Monitoring, Regular	Aldicarb sulfone	—	Archived
January 1, 2008 – December 31, 2010	Monitoring, Regular	Aldicarb sulfoxide	—	Archived
January 1, 2008 – December 31, 2010	Monitoring, Regular	OXAMYL	—	Archived
April 1, 2006 – April 30, 2006	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	—	Resolved
October 1, 1979 – October 31, 1979	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmation

Enforcement actions

December 28, 2022State Compliance achieved5 linked violations
April 21, 2021State Compliance achieved1 linked violation
April 21, 2021State Violation/Reminder Notice1 linked violation
October 5, 2020State Violation/Reminder Notice12 linked violations
October 5, 2020State Compliance achieved3 linked violations
June 12, 2019State Compliance achieved1 linked violation
June 12, 2019State Compliance achieved1 linked violation
April 3, 2019State Compliance achieved1 linked violation
October 27, 2017State Compliance achieved1 linked violation
October 27, 2017State Compliance achieved1 linked violation
April 4, 2013State Compliance achieved1 linked violation
June 29, 2011State Compliance achieved20 linked violations

Contact

MCNEIL ISLAND WATER

Phone not on record

Tumwater, WA 98501