Product - Chemical Oxygen Demand (COD)

Total confidence in COD analysis. Now that’s smart.  

Look to Hach for your complete COD testing solution. Our samplers, instruments, chemistries and lab supplies work together to provide superior results.

COD provides a measure of organic removal by treatment processes. Use COD as a surrogate for BOD and for effluent reporting when regulations allow.

AS950 Peristaltic Samplers


Water quality data relies on sample integrity. Correct sampling procedures deliver accurate lab results, a critical component for reporting and process monitoring.

Cooling rack for 8 cuvettes (Ø 16 mm), stainless steel

Sample Preparation

Hach offers a continually expanding selection of laboratory supplies to cover a range of analytical testing needs. COD must-haves include industrial-strength blenders and test tube racks.

DRB200 Digital Reactor Block for TNTplus: 30 x13 mm vial wells, 115 Vac


Easy to use and fast, safe to operate and versatile, Hach DRB reactors accommodate most test vials. Choose a dual block for running two programs at the same time.

Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand method in the world for NPDES reporting and for easy process monitoring.

DR3900 Benchtop VIS Spectrophotometer with RFID* Technology


Genuine Hach instruments, chemistries, methods and expertise from one source give you incomparable results. Each of Hach’s easy-to-use spectrophotometers and colorimeters give you pre-programmed methods, factory calibration and automatic wavelength selection.

ez COD Recycling Service (5-gallon mail-back)

Disposal- SAVE $$$ Here!

Mercury-based COD vials need appropriate environmental disposal. Hach gives you easy and economical options.
Calculate how much you could save!