TWIN RIDGES GRIZZLY HILL SCHOOL
California - Non-Transient Non-Community - PWSID: CA2900578
System Information
| PWSID | CA2900578 |
| System Name | TWIN RIDGES GRIZZLY HILL SCHOOL |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Oct 23, 1986 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | NEVADA CITY |
| ZIP Code | 95959 |
| Address | 16661 Old Mill Rd. |
| Organization | BENDER, SUNSHINE |
| Phone | 530-265-3049 |
Population & Service
| Population Served | 125 |
| Service Connections | 11 |
Drinking Water Violations (31)
This water system has 31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| May 1, 2017 | May 31, 2017 | MON | No | Yes | - | - | - | Resolved | May 31, 2017 | - | |
| May 1, 2017 | May 31, 2017 | MON | No | Yes | - | - | - | Resolved | May 31, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Feb 1, 2015 | Feb 28, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2015 | - | |
| Feb 1, 2015 | Feb 28, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2015 | - | |
| Apr 1, 2011 | Apr 30, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2011 | - | |
| Apr 1, 2011 | Apr 30, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2011 | - | |
| Apr 1, 2011 | Apr 30, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2011 | - | |
| Oct 1, 2005 | Oct 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2005 | - | |
| Oct 1, 2005 | Oct 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2005 | - | |
| Oct 1, 2005 | Oct 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2005 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2002 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2002 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2002 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2002 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2002 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Oct 1, 1997 | Oct 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1997 | - | |
| Jul 1, 1993 | - | MR | No | No | - | TT | - | Resolved | Sep 30, 2005 | - | |
| - | - | - | 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.