Omega Yeast OYL-004 West Coast Ale I Liquid Yeast


Popularly the “Chico,” this neutral, highly attenuating, moderately flocculating chart topper is a great house for its reliability, versatility — and lauded place in American craft beer history. It ferments cool, crisp and clean at the low range, with light citrus under 66° F. Great for displays of malts and hops. Also try DIPA Ale (OYL-052) and British Ale I (OYL-006) for hops, or West Coast Ale II (OYL-009) and Scottish Ale (OYL-015) for malts.


  • Flocculation: Medium-Low
  • Attenuation: 73-80%
  • Temperature Range: 60-73° F (16-23° C)
  • Alcohol Tolerance: 11% ABV
This is a special order yeast, please allow an extra week for delivery. Also, we ship out liquid yeast at the beginning of the week and include a cold-pack during warm months to ensure freshness.