RAPID CITY
South Dakota — Community Water System — PWSID: SD4600406
System Information
| PWSID | SD4600406 |
| System Name | RAPID CITY |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Dec 9, 2025 |
Location & Contact
| State | South Dakota |
| City | RAPID CITY |
| ZIP Code | 57701 |
| Address | 300 6TH STREET |
| Organization | RAPID CITY |
| Phone | 6053944162 |
Population & Service
| Population Served | 72,009 |
| Service Connections | 23,171 |
Drinking Water Violations (8)
This water system has 8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2002 | Dec 31, 2002 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2002 | Radionuclides and Revised Rad Rule |
| Oct 1, 2002 | Dec 31, 2002 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2002 | Radionuclides and Revised Rad Rule |
| Oct 1, 2002 | Dec 31, 2002 | Combined Uranium | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2002 | Radionuclides and Revised Rad Rule |
| Oct 1, 2002 | Dec 31, 2002 | Combined Uranium | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2002 | Radionuclides and Revised Rad Rule |
| Oct 1, 2002 | Dec 31, 2002 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2002 | Radionuclides and Revised Rad Rule |
| Oct 1, 2002 | Dec 31, 2002 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2002 | Radionuclides and Revised Rad 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 |
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.