Water bosses have re-opened the old wound over compensation for Lancashire’s cryptosporidium outbreak last year.
Consumers affected by a boil water notice in parts of Greater Manchester for less than three days this week have been given £20 payouts - just £40 less than customers in the Fylde Coast, Preston, South Ribble and Chorley areas received for a entire month without supplies in 2015.
Supplies in Tameside and Oldham were affected due to a problem at a water treatment plant.
Residents were advised to boil all water, or use bottled.
United Utilities announced all 17,000 households affected would get £20.
The level of payments made to 300,000 consumers in Lancashire in 2015 - £50 to £60 - sparked wholesale protests by consumers at the time.
A United Utilities spokesman said it had worked with water watchdog, the Consumer Council for Water, to set “the right figure to fairly reflect loss of service and inconvenience caused.”