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Samui water rationing begins 3 August after drought

Koh Samui will introduce rotating water supplies for seven days from 3 August after drought reduced available production well below daily demand, the Provincial Waterworks Authority (PWA) Samui branch has announced.

The move follows a continuing decline in raw-water levels, leaving the island unable to produce enough tap water for residents and businesses. The PWA made the announcement on 28 July 2026.

Daily shortfall reaches 18,000 cubic metres

According to the authority, Samui's main available water supply for tap-water production, from the pipeline system from the mainland, is now about 16,000 cubic metres a day.

Average demand on the island is 34,000 cubic metres a day, creating a daily shortfall of 18,000 cubic metres. The rotating supply system is intended to spread the limited water available across all areas as fairly as possible.

The PWA has divided its service areas into a yellow zone and a red-green zone, with water to be supplied on a rotating schedule during the seven-day period.

It has asked households and businesses to store water ahead of days when their area is not being supplied, and to use only what is necessary.

Residents and tourism businesses affected

Some communities have already reported weak water pressure or no running water for several consecutive days. This has affected household use, cooking and hygiene, while some families have faced extra costs buying water from private tanker operators.

For foreign residents, long-stay visitors and holidaymakers on Samui, the immediate practical concern is to check with accommodation providers, landlords or local management offices about the supply timetable and whether water storage is available.

Restaurants, hotels, resorts and tourism operators are also facing higher costs for obtaining reserve water. Businesses have raised concerns that a prolonged shortage could affect visitor confidence and Samui's reputation as a tourism destination.

The PWA has not stated whether the rotating supply arrangements will continue beyond the initial seven-day period.

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29 July 2026

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Jimbolkb Senior Member

Jimbolkb

Member

if only someone invented something to use sea water to flush toilets

and somehow make the seawater into drinking water

maybe in 10-20-30 years, thais will invent REVERSE OSMOSIS

Woke to Sounds Gold Member

Woke to Sounds

Advanced Member

These are the consequences for those wicked geo engineering experiements the devil puppets are running worldwide.

Are you finally getting it or what.

animatic Star Member

animatic

Advanced Member
(edited)

3 hours ago, jacko45k said:

So is it purely an increase in demand that has brought about a shortage?

….

A desal plant that should have been built perhaps?

There is a plant in Lipa Noi, but it’s not working properly and is being repaired, in theory.

There should be at least two more built and added asap. But like the island garbage incinerator things go at their own glacial speed.

Edited by animatic
Duplicates

rumeaug Advanced Member

rumeaug

Member
24 minutes ago, Jimbolkb said:

if only someone invented something to use sea water to flush toilets

and somehow make the seawater into drinking water

maybe in 10-20-30 years, thais will invent REVERSE OSMOSIS

we already know how to turn seawater into drinking water using desalinisation platforms. Many countries have those already.

Jo M Rookie Member

Jo M

Member

Someone do not understand sarcastic comments?

JAS21 Platinum Member

JAS21

Advanced Member
32 minutes ago, Jo M said:

Someone do not understand sarcastic comments?

I don’t think you really need to post that…lol

Guderian Ruby Member

Guderian

Advanced Member
5 hours ago, jacko45k said:

So is it purely an increase in demand that has brought about a shortage?

Probably due to the tens of thousands of police, TRD officials, land office bods and investigators combing the island in search of nominee shareholders and their evil farang masters...

PoorSucker Star Member

PoorSucker

Advanced Member
2 hours ago, CFCol said:

A ban on more building is needed.

A ban on swimming pools

khunPer Diamond Member

khunPer

Advanced Member
4 hours ago, Jimbolkb said:

if only someone invented something to use sea water to flush toilets

and somehow make the seawater into drinking water

maybe in 10-20-30 years, thais will invent REVERSE OSMOSIS

Koh Samui already have Sea Water Reverse Osmosis (SWRO) desalination facilities, primarily as auxiliary plants managed by the Provincial Waterworks Authority during severe droughts, alongside private commercial and resort-run RO systems. But they cannot supply the whole island at present — it's "auxiliary" — likely because it is still cheaper to "import" fresh water from the mainland through the pipeline, which is too small compared to the progress on the island's turist-industry and also depending of the sources on the mainland.

Some residents collects rain water, especially in areas without public fresh water supply, and some use a well, and some — including myself without useable well and no public water pipes — have permanent fresh water supply by water truck.

khunPer Diamond Member

khunPer

Advanced Member
1 hour ago, PoorSucker said:

A ban on swimming pools

Should instead be saltwater pools refilled with seawater — however, seawater salt might spoil the equipment; so, would not work — would instead be an idea to stop refilling water to pools during drought, as they evaporate about 10 mm per day. You ban-suggestion seems right...👍

khunPer Diamond Member

khunPer

Advanced Member
28 minutes ago, PoorSucker said:

Been saying this for 27 years.

Pig bill (Sören), RIP that moved to Samui 1974 told me he saw it coming.

Do you meet him Per?

Oh boy he had some stories but he was mostly drunk in the 70s.

I was the only one that knew where he lived. Brought him Swedish food when he was over 80 years old.

Every time new immigration chief they came and arrested him , he was married into a Samui family so he was always out in one hour.

He was the school bus driver in the 70s

I got invited into weddings and funerals as his friend, always closest table to the "families".

Thanks for your reply. I didn't know Sören, I don't mingle much with farangs.

And don't worry to much about pool-water; yesterday it rained more the 10 mm — 16 mm in Mae Nam — and it is also raining now...👍

PoorSucker Star Member

PoorSucker

Advanced Member
6 minutes ago, khunPer said:

And don't worry to much about pool-water; yesterday it rained more the 10 mm — 16 mm in Mae Nam — and it is also raining now...👍

Seems western moonson is early this year.

https://weather.tmd.go.th/cmploop.php

Burma Bill Diamond Member

Burma Bill

Advanced Member
11 hours ago, Georgealbert said:

after drought reduced available production

After a hot and sweaty day on the beach -

image.png

emptypockets Platinum Member

emptypockets

Advanced Member
5 hours ago, banyanman said:

A freshwater pipeline from the mainland would benefit the island far more than a bridge.

From the OP:

According to the authority, Samui's main available water supply for tap-water production, from the pipeline system from the mainland, is now about 16,000 cubic metres a day.

Nick Carter icp Star Member

Nick Carter icp

Advanced Member

I am quite enjoying this .

For years I've listened to foreigners discovering Koh Samui and going to live on the Island permently .

Buying forever place on a pardise island

100"s , 1000's of them going to live in paradise and offering healing, yoga , self awareness , getting in touch with your inner self courses for 3000 Baht a time .

Now they have no water and the authorities are confiscating their properties .

:)

Recoveringslowly Newbie

Recoveringslowly

Member
On 7/29/2026 at 4:00 AM, blaze master said:

This is generally what happens to world class destinations.

On the contrary to your obviously "biased" statement, I'm from Western Australia and we have water rationing / restrictions often due to drought, but hey you keep going with your rant mate.......

blaze master Diamond Member

blaze master

Advanced Member
36 minutes ago, Recoveringslowly said:

On the contrary to your obviously "biased" statement, I'm from Western Australia and we have water rationing / restrictions often due to drought, but hey you keep going with your rant mate.......

And you keep missing the point.....mate.

xtrnuno41 Platinum Member

xtrnuno41

Advanced Member

And then they want to make harbors for cruise ships to visit Koh Samui.

About 400 of those ships a year ! What could go wrong?

The smallest cruise ship is the Hebridean Princess, which accommodates up to 48 guests

The biggests, wellcome to Koh Samui

Gross Tonnage (GT)

Length (m)

Passenger Capacity (Double Occupancy)

Maximum Capacity

Icon of the Seas

248,336

365

5,610

7,600

Star of the Seas

248,336

365

5,610

7,600

Legend of the Seas

250,800

365

5,610

7,600

PJ71 Platinum Member

PJ71

Advanced Member
On 7/29/2026 at 2:26 AM, rumeaug said:

we already know how to turn seawater into drinking water using desalinisation platforms. Many countries have those already.

Yes, many marine vessels do this.

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