Permit
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Oxygen measurement techniques
DO Probe Electrochemical method: Composed of two metal electrodes in contact with supporting electrolyte and separated from the test solution by a gas permeable membrane. A constant voltage is placed across the cathode and anode. Oxygen diffuses…
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BOD dilution water
BOD dilution water nutrient solutions can be a source of contamination. If you prepare your own solution, make sure you store the phosphate buffer in a refrigerator. Discard any solution if it becomes cloudy or you observe any "chunks" floating in…
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Calibration & barometric pressure
Pressure adjustments Typically, any barometric pressure measurement that you hear (radio, TV) represents a value that has been corrected to a value relative to sea level. Why is this? For one thing, it's a means of standardizing data. Barometric…
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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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What to look for when purchasing a property
There are many issues to consider when purchasing a property. Depending on the size and scope of the property, and the final plans for use of the land and/or buildings, a new owner may run into multiple programs within the DNR that have rules…
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Waterway and wetland permits
This page connects you directly to information from the program. If your proposed or existing facility is near surface waters or wetlands, a permit may be required. Please review the web page, Waterway protection. When finished reviewing, please use…
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Water supply
When starting a small business, you will need to consider all of your water needs. This can include any basic services such as restroom facilities (toilets, sinks, showers), breakrooms (coffeemakers, sinks) or fire suppression (sprinkler systems,…
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Wastewater
For information about wastewater, please see the Wastewater Wisconsin Pollutant Discharge Elimination System (WPDES) Permit Program. When finished reviewing, please use your browser's back button to return to this page and continue on to Solid Waste…