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
Depth of Water	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

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