The Gulf of America Coastal Acidification Network (GCAN) hosted this webinar on May 13, 2025, which provides highlights from the 2025 Wepal-Quasimeme Workshop in the UK with presenter Interim GCAN Coordinator Siobhan Kassem of Texas A&M University. Improving consistency in carbonate chemistry measurements is critical for climate and ocean acidification research. The 2025 Wepal-Quasimeme workshop emphasized the need for inter-laboratory comparisons, discussed limitations of current CRMs, and elaborated on the need for regional reference material distribution hubs. Additional focus areas included variability in mCP purity, advances in instrumentation and CO2SYS. The workshop emphasized the need of international collaboration and standardization to ensure high quality, comparable data across monitoring networks.