Public Health
- Webpage
Meth lab/clandestine drug lab information
Methamphetamine (meth) made in makeshift laboratories, such as rented apartments or hotel rooms, may cause contamination of indoor air and property and pose a risk of fire or explosion. When law enforcement officials seize a meth lab, containers and…
- Webpage
Laboratory services
The DNR receives laboratory data from many sources for environmental monitoring. This environmental monitoring is done for compliance with state and federal rules, investigating environmental problems, determining baseline quality, verifying cleanup…
- Webpage
PFAS Certification
The Wisconsin Department of Natural Resources is offering certification for PFAS in drinking water (potable water), aqueous (non-potable water), and non-aqueous matrices.Labs that currently hold WI DNR PFAS certification can be found here: WI PFAS…
- Webpage
BOD Toxicity
Sample ToxicityOften referred to as "sliding" BODsBOD decreases as sample volume increases (i.e., less dilute)Occurs frequently in systems receiving industrial wasteAmounts to killing off (or severe shock to) "the bugs"Results in under-reporting the…
- Webpage
BOD Seed
Seed Preparation and AdditionDe-ionized water kills - Adding a seed capsule to deionized water causes an osmotic imbalance that will kill seed organisms. The purified water —containing no salts— rushes across the bacterial cell walls. The bacteria…
- Webpage
BOD Resources
Websites Field Training Manual for Laboratory Analysts: Chapter 7 - BOD Biochemical Oxygen Demand Source: http://home.windstream.net/mikeric/Chap1to9/Chap7%20Biochemical%20Oxygen%20Demand.htm-->
- Webpage
BOD Quality Control
Limit of Detection (LOD)BOD detection limits are theoretically based. A key assumption which the concept of detection for BOD is based is that the LEAST amount of depletion allowable is 2 mg/L. The LOD is also based on the highest volume of sample…
- Webpage
BOD Sample Pre-Treatment
Because the BOD test is a bioassay, it is critical to maintain optimal conditions for the "bugs" (bacteria and other microorganisms) to remain viable. Temperature, pH, oxygen levels and the presence of disinfectants can all influence the outcome of…
- Webpage
cBOD
Nitrogenous Oxygen Demand (NOD) cBOD v. BOD - If you have Nitrogenous Oxygen Demand (NOD) you should consider analyzing cBOD vs. BOD