| Fluoride | Archived | Jan 1, 2026 to Mar 31, 2026 |
| Public Notice | Resolved | Aug 15, 2025 to Sep 18, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Surface Water Treatment Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Surface Water Treatment Rule | Resolved | Nov 1, 2024 to Nov 30, 2024 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | Nov 1, 2024 to Nov 30, 2024 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | Nov 1, 2024 to Nov 30, 2024 |
| Public Notice | Resolved | Sep 29, 2024 to Sep 18, 2025 |
| Public Notice | Resolved | Jul 14, 2024 to Sep 18, 2025 |
| Surface Water Treatment Rule | Resolved | May 1, 2024 to May 31, 2024 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | May 1, 2024 to May 31, 2024 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | May 1, 2024 to May 31, 2024 |
| Public Notice | Resolved | Apr 10, 2024 to Sep 18, 2025 |
| LASSO | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| CARBON, TOTALHealth-based | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| Simazine | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| Atrazine | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| Public Notice | Resolved | Jan 8, 2024 to Sep 18, 2025 |
| CARBON, TOTALHealth-based | Resolved | Jan 1, 2024 to Mar 31, 2024 |
| CARBON, TOTALHealth-based | Resolved | Oct 1, 2023 to Dec 31, 2023 |
| CARBON, TOTALHealth-based | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Public Notice | Resolved | Oct 3, 2022 to Oct 28, 2022 |
| CARBON, TOTALHealth-based | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Revised Total Coliform Rule | Resolved | Jan 1, 2021 to Jan 31, 2021 |