Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Mar. 31, 2021
Jul. 01, 2021
Sep. 30, 2020
Document Type 10-K/A    
Amendment Flag true    
Amendment Description The Alkaline Water Company Inc. (“we”, “us”, “our” and the “Company”) is filing this Amendment No. 1 on Form 10-K/A (the “Amendment”) to amend its Annual Report on Form 10-K for the fiscal year ended March 31, 2021, originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on July 6, 2021 (the “Original Report”). In filing this amendment, the Company has amended certain information in the table for Securities Authorized for Issuance under Equity Compensation Plans, in the section on Executive Compensation and has corrected certain other information, which it considers immaterial. Except as described below, all other information in, and the exhibits to, the Original Report remain unchanged. Accordingly, this Amendment should be read in conjunction with the Original Report and with our filings with the SEC made after the Original Report. This Amendment speaks as of the date of the Original Report and the Company has not updated the Original Report to reflect events occurring subsequent to the date of the Original Report.    
Document Period End Date Mar. 31, 2021    
Entity Registrant Name ALKALINE WATER Co INC    
Entity Central Index Key 0001532390    
Current Fiscal Year End Date --03-31    
Entity Filer Category Non-accelerated Filer    
Entity Common Stock, Shares Outstanding   89,761,122  
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 85,287,096.72
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Trading Symbol WTER    
Security Exchange Name NASDAQ    
Title of 12(b) Security Common stock    
Entity Interactive Data Current Yes    
Document Annual Report true    
Document Transition Report false