Educators
- Webpage
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…
- Webpage
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…
- Webpage
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…
- Webpage
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…
- Webpage
Open burning publications
This is a partial list of publications related to open burning. Other resources may be available.
- Webpage
Environmental and health impacts of open burning
All open burning poses risks to the environment and public health. Smoke pollutes the air we breathe. Ash pollutes our soil, groundwater, lakes, rivers and streams. Burning anything in the outdoors can cause a wildfire. Burning only approved…
- Webpage
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.
- Webpage
Resources for homeowners and farmers
The following resources describe things homeowners and farmers can do to reduce polluted runoff, related to the Wisconsin River Basin TMDL.
- Webpage
Lower Fox River Basin Volunteer Monitoring Program
In May 2012, the U.S. Environmental Protection Agency (EPA) approved the Lower Fox River Basin Total Maximum Daily Load (TMDL). The TMDL set targets to improve surface water quality by reducing phosphorus and sediment loading in the watershed.