The Point Reyes National Seashore unveiled a new plan to improve and monitor water quality in the creeks, drainages and beaches downstream of its ranches and dairies. The California Coastal Commission had rejected a first draft of the plan last spring, giving the park until September to develop a more sophisticated version. 

Coastal commissioners lambasted the park’s first effort, raising fundamental concerns about the impacts of agriculture in the seashore. But in a report…