Coupeville, WA · Island County

MAPLE HILL PARK 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): WA5309356
System type: Community Water System
Population served: 35
Service connections: 22
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2025 – December 31, 2025
Archived
Monitoring, Regular
—
Benzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Toluene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Styrene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Arsenic
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Barium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Cadmium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Chromium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
CYANIDE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Fluoride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Mercury
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Nickel
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Nitrite
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Thallium, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Selenium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Nitrate
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Nitrate
January 1, 2022 – December 31, 2022
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2021 – December 31, 2021
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Arsenic
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Barium
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Cadmium
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Chromium
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
CYANIDE
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Fluoride
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Mercury
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Nickel
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Nitrite
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Selenium
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Thallium, Total
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Benzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Toluene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Styrene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2020 – December 31, 2025
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2018 – December 31, 2018
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2018 – December 31, 2018
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2013 – March 31, 2013
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Diquat
January 1, 2005 – December 31, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1995 – July 31, 1995
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
January 1, 2025 – December 31, 2025	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Toluene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Styrene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Arsenic	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Barium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Cadmium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Chromium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	CYANIDE	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Fluoride	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Mercury	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Nickel	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Nitrite	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Thallium, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Antimony, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Selenium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2023 – December 31, 2023	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2020 – December 31, 2025	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Arsenic	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Barium	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Cadmium	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Chromium	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	CYANIDE	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Fluoride	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Mercury	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Nickel	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Nitrite	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Selenium	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Antimony, Total	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Thallium, Total	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Benzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Toluene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Styrene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
April 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 2013 – March 31, 2013	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Diquat	—	Resolved
July 1, 1995 – July 31, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived

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

Enforcement actions

October 15, 2024State Compliance achieved3 linked violations
January 1, 2021State Compliance achieved2 linked violations
April 1, 2014State Compliance achieved1 linked violation
January 1, 2014State Compliance achieved2 linked violations
July 1, 2010State Compliance achieved1 linked violation
January 1, 2009State Compliance achieved4 linked violations
January 1, 2008State Compliance achieved66 linked violations

Contact

MAPLE HILL PARK

Phone not on record

Coupeville, WA 98239