About 14,000 households in Kent and East Sussex are without water for a fourth day due to an issue at a treatment works.
Some schools have closed for a second consecutive day, and residents are being forced to rely on neighbours to help bring them supplies.
At 08:00 GMT, SEW said it was making "good progress" restoring water.
It later said the the issue would be resolved at about 18:00.
Listen to updates throughout the day on BBC Radio Kent and watch BBC South East Today on iPlayer.
More from South East Water, which says the customers who have seen their supply return may still have lingering problems.
Quote MessageRecharging the network needs to be done slowly to protect the network from bursts as water returns to the pipes. Some of those customers who have had their tap water restored may currently be experiencing intermittent supplies while we balance the network.
South East Water
We want to hear how the ongoing water supply problems are impacting you.
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Phil Harrison
in Tunbridge Wells
Lewis Froud, from Tunbridge Wells, said: "The frustrating thing is the deadlines for water returning keep getting pushed back.
"If we had something concrete we could plan better."
Deborah Grant, from Frant, East Sussex, said her water was starting to trickle back on Tuesday morning.
She said: "There has been no communication.
"It has been enormously inconvenient, at best."
Some secondary schools in Kent are closed for the second day due to the water supply problems.
Here is where is closed on Tuesday:
Skinners' Kent Academy has reopened on Tuesday.
If you're just joining us, here is the latest information:
Fiona Irving
South East environment correspondent
South East Water has blamed a "bad chemical batch" at its Pembury water treatment works as the reason behind the water supply disruption for thousands of homes in Tunbridge Wells.
The Pembury site has previously been problematic for South East Water.
A notice from the Drinking Water Inspectorate last autumn said that there is or has been "a significant risk of supplying water from Pembury water treatment works that could constitute a potential danger to human health or could be unwholesome".
The inspectorate added a list of requirements for the site including completing an assessment of pesticides entering the reservoir and desludging the sludge lagoons.
In the past pesticides from neighbouring fields have been found to affect the water supply at the site.
South East Water says it is continuing to investigate exactly what caused water quality to drop at the site.
Phil Harrison
in Tunbridge Wells
Bottled water stations in Tunbridge Wells have reopened at three locations - Tunbridge Wells Sports Centre on St John's Rd, Odeon Cinema on Knights Way and RCP Parking on Major York's Road. .
Cars were queuing up on Tuesday morning outside Tunbridge Wells Sports Centre for bottled water.
Here's the latest information from South East Water
Quote MessageWe're very sorry to customers in Tunbridge Wells who are continuing to experience issues with their water supply, including low pressure and no water. We are recharging the network in the Tunbridge Wells area and we have returned 10,000 properties into supply overnight.
South East Water
The company has once again revised its timetable for resolving the water supply problems - it is now estimating supplies will return at 18:00 GMT, having earlier said supplies would have been restored by 06:00 on Tuesday.
Image source, PA MediaThousands of households in Kent and East Sussex are without water for a fourth day due to an issue at a treatment works.
South East Water (SEW) apologised after up to 24,000 customers in Tunbridge Wells, Pembury, Frant and Eridge experienced a loss of water or low pressure since Saturday.
Some schools have closed for a second day, and residents are being forced to rely on neighbours to help bring them supplies.
At 08:00, SEW said it was making "good progress" restoring water but that 14,000 customers were still without supplies. It later said the issue would be resolved at 18:00.
At 14:00 on Monday the company said supplies would be restored by 08:00 on Tuesday, but many woke up to another day without water.
Image source, PA MediaGood morning and welcome to our live page on Day 4 of the water supply issues affecting Tunbridge Wells and surrounding areas.
Stay with us throughout the day as we being the latest developments - and stories from you being impacted.