Well Shock-Chlorination Dose
The household bleach to shock-chlorinate a private well from the casing diameter and standing water column: well volume, the available chlorine for the target ppm, and the bleach to pour in. The local health department governs the procedure and clearance.
Formula and source
well_volume_gal = 0.0408 x casing_in^2 x column_ft; bleach_gal = volume x target_ppm / (1,000,000 x (bleach% / 100)); available_cl_lb = (volume / 1,000,000) x target_ppm x 8.34.
AWWA A100 / state private-well shock-chlorination guidance (by name).
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