COLUSA CO. WWD #1 - GRIMES
California - Community Water System - PWSID: CA0600008
System Information
| PWSID | CA0600008 |
| System Name | COLUSA CO. WWD #1 - GRIMES |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | GRIMES |
| ZIP Code | 95950 |
| Address | P.O. Box 66 |
| Organization | SWIFT, LANCE |
| Phone | 530-520-1311 |
Population & Service
| Population Served | 512 |
| Service Connections | 114 |
Drinking Water Violations (106)
This water system has 106 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, 2025 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Oct 1, 2024 | Dec 31, 2024 | MCL | Yes | No | 23.5 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MCL | Yes | No | 23.6 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2024 | - | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | 22.4 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2024 | - | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 22.9 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2024 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 2024 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 2024 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 22.9 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 25.3 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2023 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 25.9 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 26.5 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2023 | - | |
| Nov 1, 2022 | Nov 30, 2022 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2022 | - | |
| Nov 1, 2022 | Nov 30, 2022 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 26.2 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2022 | - | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | 25.4 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2022 | - | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | 25 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2022 | - | |
| Jan 1, 2022 | Mar 31, 2022 | MCL | Yes | No | 22.7 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2022 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | 23.8 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2021 | - | |
| Jul 1, 2021 | Sep 30, 2021 | MCL | Yes | No | 24.9 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2021 | - | |
| Apr 1, 2021 | Jun 30, 2021 | MCL | Yes | No | 23.6 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2021 | - | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | 24.6 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2021 | - | |
| Dec 1, 2020 | Dec 31, 2020 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2020 | - | |
| Dec 1, 2020 | Dec 31, 2020 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2020 | - | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | 22.8 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2020 | - | |
| Jul 1, 2020 | Sep 30, 2020 | MCL | Yes | No | 23.5 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2020 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | 24.1 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2020 | - | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | 22.2 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2020 | - | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | 22.7 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2019 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | 23.5 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | 23 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | 20.8 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2019 | - | |
| Oct 1, 2018 | Dec 31, 2018 | MCL | Yes | No | 20.4 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2018 | - | |
| Jul 1, 2018 | Sep 30, 2018 | MCL | Yes | No | 23.9 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2018 | - | |
| Apr 1, 2018 | Jun 30, 2018 | MCL | Yes | No | 25.1 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2018 | - | |
| Apr 1, 2018 | Jun 30, 2018 | MCL | Yes | No | 25.1 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2018 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MCL | Yes | No | 23 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2018 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MCL | Yes | No | 23 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2018 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Jul 17, 2019 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MCL | Yes | No | 24 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2017 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MCL | Yes | No | 24 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2017 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Jul 17, 2019 | - | |
| Jul 1, 2017 | Sep 30, 2017 | MCL | Yes | No | 26 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2017 | - | |
| Jul 1, 2017 | Sep 30, 2017 | MCL | Yes | No | 26 UG/L | 0.010 mg/L | 10 | Archived | Sep 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MCL | Yes | No | 24 UG/L | 0.010 mg/L | 10 | Archived | Jun 30, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 25 UG/L | 0.010 mg/L | 10 | Archived | Mar 31, 2017 | - | |
| Oct 1, 2016 | Dec 31, 2016 | MCL | Yes | No | 24 UG/L | 0.010 mg/L | 10 | Archived | Dec 31, 2016 | - |
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.