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Laboratory testing
The Safe Drinking Water Act (SDWA) requires public water systems to test water supplies for bacteriological agents and chemical contaminants to protect the health of their consumers. The frequency and extent of testing is dependent on the population…
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Drinking water administrative codes
Wisconsin Administrative Codes that relate to private and public drinking water are provided on this page as links to the Wisconsin Legislative website. To request an official paper copy of a specific code, follow the instructions on the Wisconsin…
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Source water protection
Source water protection helps prevent contaminants from entering sources of drinking water. It's the first line of defense to reduce the chance that contaminants will be in a glass of water from your tap. Source water protection avoids potential…
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Submittal requirements by project type
Common project document definitions/expectations:Cover letters should provide a general description of the need for the project and proposed scope of work. Cover letters may address previous project approvals or prior work done that is associated…
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Public water system plan review
Chapter NR 108, Wis. Adm. Code, allows the DNR up to 90 days to approve, return or deny submitted plans for new construction or improvements relating to a public water system. Average Review Process Timeframes Water Mains: 55-65 days All other…
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Laboratory analysis slips
The following are the most current sample lab analysis slips which are used for compliance with Safe Drinking Water Act regulations. Systems are mailed sampling slips as part of the normal mailing schedule. If you did not receive a slip or need…
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Wisconsin's Capacity Development Program
The Capacity Development Program aims to help public water systems strengthen their ability to consistently supply safe drinking water to their customers. The program focuses on assisting system owners and operators, particularly small water systems…
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Instructions for creating and customizing a Consumer Confidence Report using DNR’s CCR generator
Consumer Confidence Reports (CCR) are required by the U.S. Environmental Protection Agency (EPA). The CCR must be prepared and distributed by all Community Water Systems in order to provide information concerning water quality for the previous…
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Mercury Ban
Wisconsin Act 44 was signed in October 2009 and regulates the sale, distribution and use of specific mercury and mercury-containing devices to Wisconsin citizens, businesses, institutions and others, including specific requirements for Wisconsin K-…
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About Mercury
Mercury is a naturally occurring element (Hg on the periodic table) that is found in air, water and soil. It exists in several forms: elemental or metallic mercury, inorganic mercury compounds and organic mercury compounds. Elemental or metallic…