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What credits do you receive for a cistern from N.C. DWQ (the North Carolina Division of Water Quality) to offset the size of the Best Management Practice (BMP)?

April 26, 2017cistern Credits division north carolina offset size

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What credits do you receive for a cistern from N.C. DWQ (the North Carolina Division of Water Quality) to offset the size of the Best Management Practice (BMP)?

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For each gallon that you are able to store in your cistern you get a 1:1 credit that can be used to decrease the size of your BMP. Currently, the DWQ only allows the credit to apply to rainwater harvested off rooftops. The DWQ Technical Guidance for Rainwater Harvesting is on the Stormwater Permitting Unit home page.