SHELTON, WA · Mason County
OAK 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)
- WA5362675
- System type
- Community Water System
- Population served
- 695
- Service connections
- 227
- Ownership
- privately owned
- Water source
- groundwater (wells)
Violation history
Monitoring, Regular
—Nitrate
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Nitrate
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Nitrate
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—Nitrate
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
June 1, 2018 – June 30, 2018
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Benzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Toluene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Styrene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Benzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Toluene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Styrene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2011 – December 31, 2013
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2011 – December 31, 2013
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
October 1, 1995 – October 31, 1995
ArchivedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
May 1, 1993 – May 31, 1993
ArchivedMonitoring, Regular
—Barium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Cadmium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Chromium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Mercury
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Nitrate
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Selenium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Fluoride
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Arsenic
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 state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Nitrate | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Nitrate | — | Archived |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | Nitrate | — | Resolved |
| June 1, 2018 – June 30, 2018 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2011 – December 31, 2013 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| October 1, 1995 – October 31, 1995 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
| May 1, 1993 – May 31, 1993 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Barium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Cadmium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Chromium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Mercury | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Nitrate | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Selenium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Fluoride | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Arsenic | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- December 18, 2023State Compliance achieved1 linked violation
- December 18, 2023State Compliance achieved1 linked violation
- July 17, 2018State Compliance achieved1 linked violation
- November 14, 2016State Compliance achieved20 linked violations
- November 14, 2016State Compliance achieved20 linked violations
- May 31, 1993State Violation/Reminder Notice3 linked violations
- October 31, 1992State Violation/Reminder Notice1 linked violation
- February 29, 1992State Violation/Reminder Notice1 linked violation
Contact
OAK PARK
Phone not on record
SHELTON, WA 98584-5034