Mireille Yarrow
Lake Data Editor
U.S. lake and freshwater water-quality grading from EPA and state-agency monitoring data
Mireille Yarrow leads how LakeQuality reads and presents lake water-quality data from the EPA Water Quality Portal, the Minnesota DNR LakeFinder, and the Wisconsin DNR Surface Water dataset. The role decides which sample parameters and reporting-year windows each lake page uses, how the Carlson Trophic State Index is computed into a letter grade, and how data corrections are triaged. Clarity, nutrient, and grade figures are drafted with AI assistance and editorially reviewed against the underlying EPA and state-agency records — every value links back to its source.
Areas of focus
How our content is produced
Content is produced by an AI-augmented editorial team: research and drafting are AI-assisted and reviewed by the named desk editor against primary public-data sources before publication.
See our Editorial Policy, Fact-Checking Policy, and Corrections Policy.