Cause of the United Utilities cryptosporidium outbreak is revealed

Posted on - 10th October, 2017 - 4:08pm | Author - | Posted in - Business, Crime, Preston News
Inside the Franklaw water treatment works
Inside the Franklaw water treatment works

The reason why Prestonians couldn’t drink their water without boiling it for a month has finally been revealed.


United Utilities has been fined after a cryptosporidium outbreak at its Franklaw treatment plants to the north of Preston,

The Drinking Water Inspectorate found the problems came from the Franklaw works using a different reservoir to source water

Rainwater running off agricultural land was able to access an underground water tank at Barnacre.

A ‘planned change in operations’ allowed the entry of the contaminated water into the treatment process.


Traces of cryptosporidium were detected in the water at Franklaw triggering a shut off of supplies for 700,000 people across Lancashire.

Supplies for many were knocked out for a month during the summer of 2015 as engineers worked to fix the issue.

Read more: Grimsargh Wetlands project given the go ahead

At Preston Crown Court the hearing fined United Utilities £300,000 and additional costs of £150,000 were also agreed. The firm had pleaded guilty to supplying water unfit for human consumption.

Chief inspector of Drinking Water Marcus Rink said: “This prosecution was brought about because the company failed to follow nationally recognised and published good practice in assessing the risks of returning stored water to critical stages within the treatment works and to take appropriate and rapid action to protect consumers when the contamination was known.”

barton manor gym

United Utilities was criticised for not acting fast enough to issue the boil water warning to households and businesses.

Tap water is not safe to drink Pic: Olly Clarke
Tap water is not safe to drink Pic: Olly Clarke

It has since paid out £20million in compensation to customers through reduced water bills.

Chief executive Steve Mogford said: “We are very sorry for the impact this had on our customers. I know from first-hand the inconvenience this incident caused, having lived in Lancashire for forty years. We have learned valuable lessons from what happened and have put technology and processes in place to guard against a repeat of this type of incident. United Utilities is now a leading company in terms of resilience to cryptosporidium.

“Public safety is always our primary concern and customers can be reassured that the North West’s drinking water is of an extremely high quality. Incidents of the kind that affected Lancashire in summer 2015 are thankfully extremely rare. The fact that we spotted the bug quickly, through our routine sampling, and immediately issued precautionary advice, minimised the risk of any customer falling ill.”

The fine was branded ‘pathetic’ by Preston MP Mark Hendrick

barton manor gym
Preston in pictures Converted beer barrelsSunset at the bull nose24.02.18 - Preston [Queuing] 240216Past Times1Bistrot PierreCrystal HouseAnd dog food pleaseDocklands @ Preston View more Advertisement Subscribe to the newsletter

Sign up below to receive Blog Preston's email newsletter. It wings its way into inboxes every Sunday and Wednesday rounding up our top stories and more.

Advertisement News by location

Find news by location, select an area of your choice to be kept up to date with the latest goings on.

The Preston Guide

Discover local businesses and services near you.

Advertisement Categories

Find news by category, select an category of your choice to be kept up to date with the latest goings on.

Blog Preston email updates

Receive our digest of the biggest and best stories every Sunday to your email inbox

We respect your privacy and you can unsubscribe at any time from our emails