Community Water System · PWSID SD4602310

Owanka Rural Water System

Serves 52 peopleGroundwaterOwner: PrivateBlack Hawk, South Dakota
Nothing open right now.

On record since 2016: 20 violations. 20 over the limit. Most recent began 2020-10-01.

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

20Over the limit
0Treatment lapse
0Missed or late test
0Notice or report

More violations on record than 91% of active water systems in South Dakota. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005201020152016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 420202025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
100% over the limit · 20

Across South Dakota, 52% of violations are missed or late tests and 10% 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

12 ppb
2 ppb
2 ppb

Every violation on record

  1. 2020-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  2. 2020-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  3. 2020-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  4. 2020-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  5. 2019-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  6. 2019-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  7. 2019-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  8. 2019-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  9. 2018-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  10. 2018-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  11. 2018-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  12. 2018-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  13. 2017-10-31Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  14. 2017-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  15. 2017-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  16. 2017-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  17. 2016-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 7.00 PCI/LBack in compliance
  18. 2016-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  19. 2016-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
  20. 2016-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance

System details

Population served52
Service connections23
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityBlack Hawk
EPA ZIP on file57718

Areas served

  • Pennington County, 57718,57763

Reading this record

Owanka Rural Water System is a community water system that draws from groundwater and serves about 52 people in Black Hawk, South 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.