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Hach's Easy Chemistry - COD

Quicker Results Than BOD Testing

Use COD as a correlative/ early indicator of BOD levels. Some NPDES permits include COD as a surrogate for BOD; however, BOD is the standard reportable parameter for oxygen demand in wastewater. COD provides a measure of available organic “food” and estimates the effect of the plant’s effluent on the receiving body. (Note: Can be correlated to BOD on a plant-by-plant basis, if influent characteristics are constant.)

Hach’s COD Method

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.

Chemical Oxygen Demand

8000: Low Range and High Range
10211: Ultra-low Range
10212: Ultra-high Range
10067: Mercury-free Manganese III Digestion Method with chloride removal
10067: Mercury free Manganese III Digestion Method without chloride removal

More about Hach Methods

One-Button Analysis with DR Spectrophotometers

TNTplus™ technology works exclusively with the Hach DR Family of Spectrophotometers (DR 2800™, DR 3900™, and DR 6000™). The chemistry vials require no preparation or glassware and enable the spectrophotometer to automatically recognize the testing method, eliminating the need to pre-program or create calibration curves. No blank is required, further reducing expense.

Easy Disposal

The USEPA requires safe disposal of waste generated by the dichromate COD method. Hach’s ez CODTM Recycling Service for USA customers reduces COD reagent recycling costs and greatly simplifies the task of recycling. This hassle-free program gives economical disposal for mercury-containing vials. Just throw your used COD vial in the bucket.


Download ez CODTM Brochure
Spectrophotometer Selection Guide

TNTplus™ Data Sheet

COD TNTplus