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Approximate Amount of Bleach for Disinfection of a Drilled or Driven Well (Metric)

Table 2. Approximate Amount of Bleach for Disinfection of a Drilled or Driven Well (Metric)
Depth of Water Diameter of Well Casing
5 cm 10 cm 15 cm 20 cm 25 cm 0.6 m 0.9 m
3 m 12 mL 48 mL 118 mL 177 mL 296 mL 1.66 L 3.78 L
6 m 24 mL 96 mL 236 mL 354 mL 592 mL 3.32 L 7.56 L
9 m 36 mL 144 mL 354 mL 531 mL 888 mL 4.98 L 11.34 L
12 m 48 mL 192 mL 472 mL 708 mL 1.18 L 6.64 L 15.12 L
15 m 60 mL 240 mL 590 mL 885 mL 1.48 L 8.30 L 18.90 L
30 m 120 mL 480 mL 1.18 L 1.77 L 2.96 L 16.60 L 37.80 L

Notes:

  • Use only unscented household liquid chlorine bleach.
  • Bleach concentrations can vary between 5% and 6%.
  • Quantities given in this table are approximate and are rounded to the nearest practical measurement. Amounts given are calculated in accordance with reaching a chlorine concentration of 100 mg/L

Key:

  • cm: centimeter
  • m: meter
  • 1 m = 100 centimeters
  • mL: milliliter
  • L: liter
  • 1 liter = 1000 milliliters

For information in United States measurements, please see Table 2. Approximate Amount of Bleach for Disinfection of a Drilled or Driven Well.

 
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