Evidence into Intelligence, Intelligence into Action.

Case study: low oxygen and a fish kill in Baltimore’s harbor, July 2026

Stage 01 of 06 / Collect

We pulled dissolved oxygen readings every 15 minutes from DNR sensors.

• 1.87 mg/L

  Fort McHenry, July 6, 2026, 1:45 AM

• 1.44 mg/L

  Masonville Cove, July 7, 2026, 1:00 AM

Fish need oxygen in the water to live. Both harbor sensors recorded low oxygen conditions before the July 8th news report.

• Source: Fort McHenry readings, Maryland DNR Eyes on the Bay
• Source: Masonville Cove readings, Maryland DNR Eyes on the Bay