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Adjusting your bill based on weather
The Weather Normalization Adjustment (WNA) is a method of billing based on “normal” weather approved by the Kentucky Public Service Commission. Today, we utilize 20-year average temperature information provided by the National Oceanic and Atmospheric Administration (NOAA) to define normal weather and the Degree Days Deficiencies method to determine heating requirements. This recognized standard enables Columbia to remove the effects of abnormal weather on the delivery portion of your bill during the heating season (December through April).
How does it work?
The delivery charge usage is adjusted to reflect “normal” weather rather than actual weather. So, if the weather is colder than normal, the WNA is a credit that reduces the amount of the delivery charge. If it’s warmer than normal, the WNA is a debit that increases the amount of delivery charge. Over time, your bill should total the same as it would without the application the WNA, which simply provides a more even method of collecting delivery costs.