Transient Non-Community · PWSID OR4195216

Zig Zag Mountain Store

Serves 70 peopleGroundwaterOwner: PrivatePortland, Oregon
Nothing open right now.

On record since 2015: 62 violations. 62 missed or late tests. Most recent began 2025-09-01.

None of them is a measurement of contaminated water.

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

0Over the limit
0Treatment lapse
62Missed or late test
0Notice or report

More violations on record than 93% 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

200520102015 · Missed or late test: 120152016 · Missed or late test: 42016 · Missed or late test: 42016 · Missed or late test: 42016 · Missed or late test: 42017 · Missed or late test: 42017 · Missed or late test: 42017 · Missed or late test: 42017 · Missed or late test: 42018 · Missed or late test: 52018 · Missed or late test: 52018 · Missed or late test: 52018 · Missed or late test: 52018 · Missed or late test: 52019 · Missed or late test: 22019 · Missed or late test: 22020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 920202021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112021 · Missed or late test: 112022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92023 · Missed or late test: 42023 · Missed or late test: 42023 · Missed or late test: 42023 · Missed or late test: 42024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92024 · Missed or late test: 92025 · Missed or late test: 42025 · Missed or late test: 42025 · Missed or late test: 42025 · Missed or late test: 42025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
100% missed or late test · 62

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

Every violation on record

  1. 2025-09-01ColiphageFailure to Conduct Assessment MonitoringPeriod ended · no return to compliance on file
  2. 2025-09-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  3. 2025-02-01Revised Total Coliform RuleMONBack in compliance
  4. 2025-02-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  5. 2024-12-01ColiphageFailure to Conduct Assessment MonitoringPeriod ended · no return to compliance on file
  6. 2024-11-01Revised Total Coliform RuleMONBack in compliance
  7. 2024-11-01ColiphageFailure to Conduct Assessment MonitoringPeriod ended · no return to compliance on file
  8. 2024-10-14E. ColiMonitoring, Source Water (GWR)Back in compliance
  9. 2024-09-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  10. 2024-08-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  11. 2024-07-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  12. 2024-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2024-01-01ColiphageFailure to Conduct Assessment MonitoringPeriod ended · no return to compliance on file
  14. 2023-06-01Revised Total Coliform RuleMONBack in compliance
  15. 2023-04-01Revised Total Coliform RuleMONBack in compliance
  16. 2023-03-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  17. 2023-02-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  18. 2022-12-01Revised Total Coliform RuleMONBack in compliance
  19. 2022-11-01Revised Total Coliform RuleMONBack in compliance
  20. 2022-10-01Revised Total Coliform RuleMONBack in compliance
  21. 2022-09-01Revised Total Coliform RuleMONBack in compliance
  22. 2022-07-01Revised Total Coliform RuleMONBack in compliance
  23. 2022-06-01Revised Total Coliform RuleMONBack in compliance
  24. 2022-04-01Revised Total Coliform RuleMONBack in compliance
  25. 2022-02-01Revised Total Coliform RuleMONBack in compliance
Show the other 37 entries
  1. 2022-01-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  2. 2021-12-01Revised Total Coliform RuleMONBack in compliance
  3. 2021-11-01Revised Total Coliform RuleMONBack in compliance
  4. 2021-10-01Revised Total Coliform RuleMONBack in compliance
  5. 2021-09-01Revised Total Coliform RuleMONBack in compliance
  6. 2021-08-01Revised Total Coliform RuleMONBack in compliance
  7. 2021-07-01Revised Total Coliform RuleMONBack in compliance
  8. 2021-05-01Revised Total Coliform RuleMONBack in compliance
  9. 2021-04-01Revised Total Coliform RuleMONBack in compliance
  10. 2021-02-01Revised Total Coliform RuleMONBack in compliance
  11. 2021-01-01NitrateMonitoring, RegularBack in compliance
  12. 2021-01-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  13. 2020-11-01Revised Total Coliform RuleMONBack in compliance
  14. 2020-10-01Revised Total Coliform RuleMONBack in compliance
  15. 2020-08-01Revised Total Coliform RuleMONBack in compliance
  16. 2020-07-01Revised Total Coliform RuleMONBack in compliance
  17. 2020-05-01Revised Total Coliform RuleMONBack in compliance
  18. 2020-04-01Revised Total Coliform RuleMONBack in compliance
  19. 2020-03-01Revised Total Coliform RuleMONBack in compliance
  20. 2020-02-01Revised Total Coliform RuleMONBack in compliance
  21. 2020-01-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  22. 2019-08-01Revised Total Coliform RuleMONBack in compliance
  23. 2019-02-01Revised Total Coliform RuleMONBack in compliance
  24. 2018-08-01Revised Total Coliform RuleMONBack in compliance
  25. 2018-06-01Revised Total Coliform RuleMONBack in compliance
  26. 2018-04-01Revised Total Coliform RuleMONBack in compliance
  27. 2018-01-01ColiphageFailure to Conduct Assessment MonitoringBack in compliance
  28. 2018-01-01Revised Total Coliform RuleMONBack in compliance
  29. 2017-12-01Revised Total Coliform RuleMONBack in compliance
  30. 2017-10-01Revised Total Coliform RuleMONBack in compliance
  31. 2017-07-01Revised Total Coliform RuleMONBack in compliance
  32. 2017-04-01Revised Total Coliform RuleMONBack in compliance
  33. 2016-10-01Revised Total Coliform RuleMONBack in compliance
  34. 2016-04-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  35. 2016-01-01NitrateMonitoring, RegularBack in compliance
  36. 2016-01-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  37. 2015-01-01NitrateMonitoring, RegularBack in compliance

System details

Population served70
Service connections1
Water sourceGroundwater
System typeTransient Non-Community
OwnerPrivate
StatusActive
CityPortland
EPA ZIP on file97266

Areas served

  • Clackamas County

Reading this record

Zig Zag Mountain Store is a transient non-community that draws from groundwater and serves about 70 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.