City staff notified the Fillmore City Council that boron concentrations in Well 7 and Well 8 previously exceeded the state's notification threshold and presented the item as a receive-and-file report.

The staff report said the state has established a notification level for boron at 1,000 micrograms per liter. According to the report, Well 7 reached the notification level on March 13, 2023, and Well 8 exceeded the notification level on Nov. 21, 2022, reaching 1,500 micrograms per liter. City staff emphasized these are notification levels, not regulatory maximum contaminant levels that would force well shutdown: “This threshold does not require any immediate action. As I was saying, it does not require wells to be shut down. It's just an official notification to the governing body of the jurisdiction that the wells are in,” the presenter said.

Council members and staff clarified units in the report after a council member pointed out the numbers were reported in micrograms rather than milligrams; staff confirmed the samples were micrograms per liter. The council also discussed the sampling cadence: staff said wells are sampled quarterly and monitoring locations are sampled on a rotating weekly schedule, with an annual comprehensive suite reported to the state. Staff explained the Department of Drinking Water requires the city to notify the governing body when notification levels are exceeded and that the state’s sanitary survey reporting cadence can produce retrospective notifications.

Councilmember questions about health thresholds were answered by staff who said the U.S. Environmental Protection Agency’s non‑cancer health advisory level for boron is 5,000 micrograms per liter and that boron is not listed among the state's primary maximum contaminant levels for drinking water. Staff characterized the current situation as a notification rather than a public‑health emergency.

The council moved to receive and file the report; the motion was seconded and carried without recorded opposition.

No remedial action or well shutdown was ordered at the meeting.