Community Water System · PWSID OR4106054

Big Oak Marina

Serves 30 peopleGroundwaterOwner: PrivatePortland, Oregon
Nothing open that measures the water, but 2 open testing or paperwork violations.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2022: 66 violations. 2 over the limit · 61 missed or late tests · 3 notices or reports. Most recent began 2025-09-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

2Over the limit
0Treatment lapse
61Missed or late test1 open
3Notice or report1 open

More violations on record than 94% of active water systems in Oregon. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052010201520202022 · Missed or late test: 42023 · Missed or late test: 32024 · Over the limit: 22024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Missed or late test: 512024 · Notice or report: 22025 · Missed or late test: 32025 · Notice or report: 12025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
3% over the limit · 292% missed or late test · 615% notice or report · 3

Across Oregon, 85% of violations are missed or late tests and 2% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

10 ppb
3.8 ppb
3.8 ppb

Open now (2)

  1. 2025-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuOpen
  2. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen

Every violation on record

  1. 2025-09-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  2. 2025-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuOpen
  3. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  4. 2025-02-01Revised Total Coliform RuleMONBack in compliance
  5. 2024-09-01Revised Total Coliform RuleMCLBack in compliance
  6. 2024-08-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2024-08-01Revised Total Coliform RuleMCLBack in compliance
  8. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  9. 2024-01-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2024-01-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2024-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2024-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  13. 2024-01-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2024-01-01Benzo(a)pyreneMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2024-01-01HexachlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2024-01-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2024-01-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2024-01-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2024-01-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2024-01-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2024-01-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2024-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2024-01-01HexachlorocyclopentadieneMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2024-01-01DinosebMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2024-01-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 41 entries
  1. 2024-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2024-01-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2024-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2024-01-01Di(2-ethylhexyl) adipateMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2024-01-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2024-01-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2024-01-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2024-01-01DalaponMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2024-01-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2024-01-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2024-01-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2024-01-01EndrinMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2024-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2024-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2024-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2024-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2024-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2024-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2024-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2024-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2024-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2024-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2024-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2024-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2024-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2024-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2024-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2024-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2024-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2024-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  31. 2024-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2024-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2024-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2024-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  35. 2023-01-01Gross Alpha, Excl. Radon and UMonitoring, RegularBack in compliance
  36. 2023-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
  37. 2023-01-01Combined UraniumMonitoring, RegularBack in compliance
  38. 2022-12-01Revised Total Coliform RuleMONBack in compliance
  39. 2022-11-01Revised Total Coliform RuleMONBack in compliance
  40. 2022-10-01Revised Total Coliform RuleMONBack in compliance
  41. 2022-08-01Revised Total Coliform RuleMONBack in compliance

System details

Population served30
Service connections25
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityPortland
EPA ZIP on file97217

Areas served

  • Multnomah County

Reading this record

Big Oak Marina is a community water system that draws from groundwater and serves about 30 people in Portland, Oregon. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.