Community Water System · PWSID ND0300762

Oberon City of

Serves 105 peopleGroundwaterOwner: Local GovernmentOberon, North Dakota
Nothing open that measures the water, but 3 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 2004: 40 violations. 3 treatment lapses · 27 missed or late tests · 10 notices or reports. 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
3Treatment lapse
27Missed or late test1 open
10Notice or report2 open

More violations on record than 98% of active water systems in North Dakota. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2004 · Notice or report: 120052008 · Notice or report: 12010 · Missed or late test: 12010 · Notice or report: 22010 · Notice or report: 220102011 · Notice or report: 22011 · Notice or report: 220152016 · Treatment lapse: 12018 · Missed or late test: 22018 · Missed or late test: 22019 · Missed or late test: 32019 · Missed or late test: 32019 · Missed or late test: 32020 · Missed or late test: 22020 · Missed or late test: 22020 · Notice or report: 120202022 · Treatment lapse: 12022 · 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: 92022 · Notice or report: 22022 · Notice or report: 22023 · Missed or late test: 42023 · Missed or late test: 42023 · Missed or late test: 42023 · Missed or late test: 42024 · Treatment lapse: 12024 · Missed or late test: 32024 · Missed or late test: 32024 · Missed or late test: 32024 · Notice or report: 12025 · Missed or late test: 32025 · Missed or late test: 32025 · Missed or late test: 32025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
8% treatment lapse · 368% missed or late test · 2725% notice or report · 10

Across North Dakota, 69% of violations are missed or late tests and 8% 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 4 results on file · action level 15 ppb

1.2 ppb
1.1 ppb
0.59 ppb
0.54 ppb

Open now (3)

  1. 2025-08-28E. ColiMonitoring, Source Water (GWR)Open
  2. 2008-10-16Public NoticePN Violation for NPDWR ViolationOpen
  3. 2004-11-21Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-09-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  2. 2025-08-28E. ColiMonitoring, Source Water (GWR)Open
  3. 2025-07-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  4. 2024-10-17Lead service line inventoryRPTBack in compliance
  5. 2024-10-17Lead service line inventoryTTBack in compliance
  6. 2024-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  7. 2024-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  8. 2024-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  9. 2023-10-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  10. 2023-10-01Revised Total Coliform RuleMONBack in compliance
  11. 2023-07-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  12. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  13. 2022-12-29Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2022-12-22Lead and Copper RuleLead Consumer NoticeBack in compliance
  15. 2022-11-13Revised Total Coliform RuleTTBack in compliance
  16. 2022-11-01Revised Total Coliform RuleMONBack in compliance
  17. 2022-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  18. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  19. 2022-08-01Revised Total Coliform RuleMONBack in compliance
  20. 2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  21. 2022-07-01Revised Total Coliform RuleMONBack in compliance
  22. 2022-05-01Revised Total Coliform RuleMONBack in compliance
  23. 2022-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  24. 2022-04-01Revised Total Coliform RuleMONBack in compliance
  25. 2020-12-01Revised Total Coliform RuleMONBack in compliance
Show the other 15 entries
  1. 2020-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  2. 2020-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  3. 2019-11-07Lead and Copper RuleLead Consumer NoticeBack in compliance
  4. 2019-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  5. 2019-10-01Revised Total Coliform RuleMONBack in compliance
  6. 2018-12-01Revised Total Coliform RuleMONBack in compliance
  7. 2018-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  8. 2016-12-31Revised Total Coliform RuleTTBack in compliance
  9. 2011-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  10. 2011-06-20Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2010-12-12Lead and Copper RuleLead Consumer NoticeBack in compliance
  12. 2010-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  13. 2010-05-20Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2008-10-16Public NoticePN Violation for NPDWR ViolationOpen
  15. 2004-11-21Public NoticePN Violation for NPDWR ViolationOpen

System details

Population served105
Service connections42
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityOberon
EPA ZIP on file58357

Areas served

  • Oberon, Benson County

Reading this record

Oberon City of is a community water system that draws from groundwater and serves about 105 people in Oberon, North Dakota. 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.