1—39
Chlorine, Free and Total, HR (0.1 to 10.0 mg/L Cl
2
)
Method 10069 (Free)
For water, treated water, estuary water, and seawater
Method 10070 (Total)
For water, treated waters, wastewater, estuary water, and seawater
DPD Method*
USEPA accepted for reporting drinking water analyses (free and total chlorine)
and wastewater analyses (total chlorine)
Measuring Hints
• If the chlorine concentration is typically less than 2 mg/L, use the Chlorine Pocket
Colorimeter (Cat. No. 58700-00).
• Analyze samples immediately. Do not use plastic containers to collect samples.
For best results, dedicate a set of cells to each test (free and total).
* Adapted from Standard Methods for the Examination of Water and Wastewater.
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