| #R001 | administrative | unknown | mandatory | Establishment of TMDLs | drinking water, wastewater, agricultural water, aquatic life, recreational water | The federal Clean Water Act requires States to establish TMDLs when certain conditions are met for waters in which the State has identified impaired beneficial uses due to water pollution. | when certain conditions are met for waters in which the State has identified impaired beneficial uses due to water pollution | high |
| #R002 | administrative | unknown | mandatory | Identification and Development of TMDLs | drinking water, wastewater, agricultural water, aquatic life, recreational water | the state must identify these waters and develop TMDLs to address the impairment unless an alternative approach (like an ARP) is expected to achieve water quality standards more efficiently. | unless an alternative approach (like an ARP) is expected to achieve water quality standards more efficiently | high |
| #R003 | reporting | reporting | mandatory | Integrated Report Preparation | other | The Surface Water Quality Assessment Program prepares a report every two years on the condition of California’s surface waters — including rivers, streams, reservoirs, estuaries, lagoons, bays, and ocean waters. | every two years | high |