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    BOD Basics

    Five-day test The BOD test originated in the United Kingdom due to pollution in the London area along the Thames River. They found that sewage dumped in the Thames River took five days to reach the ocean, hence the five-day incubation period. The…

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    Annual Report Instructions

    Green Tier participants – Your annual report is your opportunity to share your accomplishments and illustrate your commitment to superior environmental performance. Through annual reporting, you help make the connection between Green Tier…

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    Green Tier and Environmental Management Systems

    An environmental management system, or EMS, is a leadership tool for strategic planning and risk management. The systematic approach helps organizations understand their impacts and operate more efficiently. It encourages top-down and bottom-up…

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    Green Tier Auditors Resources

    The Green Tier program provides credibility to participants by requiring that their environmental management systems are audited by a DNR approved outside environmental auditor. This webpage is intended to help auditors understand the approval…

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