Public Health
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DO meter calibration
Calibration of the DO meter is arguably the most critical aspect of BOD testing, since we measure the consumption of dissolved oxygen (DO). While calibration may be the center of the DO measurement universe, calibration is in turn impacted by both…
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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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Alternatives To Burning
Before burning anything, always consider alternatives. Open burning of materials other than clean wood and some yard waste is prohibited. In addition, outdoor burning of anything generates smoke and air pollution and is the number one cause of…
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Historical Air Emissions Information
The DNR first developed its web-based Air Reporting System (ARS) in 1995. Today, more than 1,650 emissions inventories and 600 Under Thresholds Notifications (UTNs) are submitted annually by facilities to the DNR via ARS.
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Radon in private well water
Radon is a substantial health risk in many Wisconsin homes. There is a risk of developing cancer from long term exposure to radon in air and water. If you get your drinking water from a private well, this page will guide you in evaluating whether…
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Safety and Ebola hemorrhagic fever resources
The DNR has received questions about health risks to wastewater treatment plant/sanitary sewer workers from sewage containing the Ebola virus. There is very little research on the fate and transport of the Ebola virus in wastewater collection…
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Groundwater collaboration workgroup
Given the unique hydrogeology in certain regions of the state, specifically the karst geology in northeast Wisconsin, the Department of Natural Resources helped facilitate a groundwater work group to assess issues regarding landspreading and…
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Arsenic
Arsenic is a naturally occurring element found in soil and bedrock throughout Wisconsin. Under certain conditions, arsenic can be released into groundwater and enter water wells. Long-term exposure to arsenic in drinking water is known to increase…
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NR 140 Groundwater Quality Standards Update
Subscribe to NR 140 UpdatesAs part of a continuing commitment to protect public health and the environment, the DNR periodically updates groundwater quality standards in ch. NR 140, Wis. Adm. Code.
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Wisconsin's groundwater law
Wisconsin's groundwater law, Ch. 160, Wis. Stats., established the framework for a comprehensive approach to protect public health and welfare and the environment. The intent of this law is to minimize the concentration of polluting substances in…