CALICO WATER SYSTEM
South Dakota — Community Water System — PWSID: 084690476
System Information
| PWSID | 084690476 |
| System Name | CALICO WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Non-Inventory |
| Owner Type | Native American |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 4, 1980 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | South Dakota |
| City | PINE RIDGE |
| ZIP Code | 57770 |
| Address | OST WTR & SWR CO |
| Organization | O'ROURKE, SAM |
| Phone | 605-867-5804 |
Population & Service
| Population Served | — |
| Service Connections | 18 |
Drinking Water Violations (19)
This water system has 19 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2010 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 12, 2010 | Consumer Confidence Rule |
| Jul 1, 2010 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 12, 2010 | Consumer Confidence Rule |
| Jul 1, 2009 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 26, 2009 | Consumer Confidence Rule |
| Jul 1, 2009 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 26, 2009 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 7, 2008 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 7, 2008 | Consumer Confidence Rule |
| Jul 1, 2007 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 28, 2007 | Consumer Confidence Rule |
| Jul 1, 2007 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 28, 2007 | Consumer Confidence Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Mar 1, 2005 | Mar 31, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2005 | Total Coliform Rule |
| Mar 1, 2005 | Mar 31, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2005 | Total Coliform Rule |
| Mar 1, 2005 | Mar 31, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2005 | Total Coliform Rule |
| Jan 1, 1983 | Dec 31, 1985 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 1985 | Arsenic Rule |
| Jan 1, 1983 | Dec 31, 1985 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 1985 | Nitrate Rule |
| Jul 1, 1976 | Jun 30, 1980 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Jun 30, 1980 | Radionuclides and Revised Rad Rule |
| Jul 1, 1976 | Jun 30, 1980 | Combined Radium (-226 and -228) | MR | No | No | — | 5 pCi/L | — | Archived | Jun 30, 1980 | Radionuclides and Revised Rad Rule |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.