Frequent Questions

Where can I find a list of EPA-approved turbidimeters?

EPA does not approve individual makes and models of turbidimeters.  Don’t be confused when a certain model of instrument is associated with a unique type of analytical procedure, just remember that it is the analytical procedure that is being approved rather than that model of instrumentation.  EPA approved methods (that must be used in the measurement of turbidity to demonstrate compliance with the regulations) can be found in the Code of Federal Regulations {40 CFR 141.74(a)(1)}.

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