COD Information Page



What is Chemical Oxygen Demand:

Chemical Oxygen Demand (COD) is an indicative measurement of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed as mass of oxygen consumed over volume of solution (mg/L). The measurement of COD is widely used in municipal and industrial laboratories to measure the overall organic contamination in wastewater. The contamination level is determined by measuring the equivalent amount of oxygen required to oxidize organic matter in the sample.

Health Risks:

High levels of COD in water often correlate with threats to human health including toxic algae blooms, bacteria from organic waste, and seafood contamination. High COD levels affect aquatic organisms as well by causing hypoxia. Hypoxia reduces cell function, disrupts circulatory fluid balance in aquatic species, and can kill individual organisms.

Measuring COD:

The products we carry to measure COD can be found HERE.

What type of component are you looking for?

Fixed Mount Handheld Dissolved Kits:  Replacement Sensors: Calibration Gas:  Rentals: 

All sensors require a yearly calibration to ensure your gas measurements are accurate and performing within manufacturer standards. This page is desiccated to the individual manufacturers we represent and their specific calibration procedures. 

**Calibration Service Request Form **

Calibration Costs:

Calibration costs do vary, see below to get an estimate: 

Calibration Fee: $150

Analyzer Calibration Fee: $300

PM Calibration Sensor Fee: $330

Genie Calibration Fee: $265

ATI Calibration Fee: $205

** note that prices are subject to change per labor and parts required.

Contact us for help choosing the right product for your application