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Public water system record

Owanka Rural Water System

Serves an area of Pennington County, SD · 52 people served

Federal records show 17 health-based violations and no monitoring/reporting issues for Owanka Rural Water System in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.

  • SD4602310
  • BLACK HAWK
  • SD
  • 52 served

System profile

Source water Groundwater
ZIP 57718
EPA system ID SD4602310

Verify this system on EPA ECHO →

Health-based violations, last 10 years
17
Resolved
17
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Owanka Rural Water System draws water from 1 well.
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit), 2016.
  • Most recent formal enforcement: compliance order (no penalty) by South Dakota, June 2017.
  • Record on file since 2016, with 4 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 28 unknown out of 46 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 1, 2020 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jul 1, 2020 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Apr 1, 2020 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2020 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 1, 2019 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jul 1, 2019 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Apr 1, 2019 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2019 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 1, 2018 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jul 1, 2018 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Apr 1, 2018 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2018 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 31, 2017 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jul 1, 2017 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Apr 1, 2017 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2017 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
 340 Oct 1, 2016 Resolved No

Full record since 2016

EPA's records for Owanka Rural Water System go back to 2016. Before October 19, 2016 they list 4 health-based violations (4 resolved) and no monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2010 to October 18, 2016 4 0
October 19, 2016 to 2019 12 0
2020s 4 0

Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began October 2016, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
 Oct 1, 2016 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Jul 1, 2016 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Apr 1, 2016 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Jan 1, 2016 Resolved

Enforcement actions

South Dakota regulators took 1 formal enforcement action against Owanka Rural Water System in 2017, filed as 19 records in EPA's data. The most recent was a compliance order (no penalty) in June 2017.

Date By Action Violations covered
Jun 23, 2017 South Dakota Compliance order (no penalty) 19 violations (19 health-based): Combined Radium (-226 and -228)

What the violations mean

Combined Radium (-226 and -228)

17 incidents

Test results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about each of these violations.

Where the water comes from

Owanka Rural Water System draws water from 1 well.

Annual water quality report

Owanka Rural Water System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Owanka Rural Water System for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by South Dakota.

Certified drinking water labs by state EPA guidance for private wells