Happy New (Water) Year!

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Water Year Headline Graphic

The calendar may not say it’s 2023 yet, but for “water wonks” (those folks who are really into hydrology), it is! The 2023 Colorado River Water Year runs October 1, 2022 to September 30, 2023! Why does the Water Year work that way? It is based on the fact that precipitation begins in the fall and won’t drain out of the watershed until the following summer, so each water year is named after the calendar year in which the runoff ends.